# The 14th International Workshop Dark Side Of the Universe

Europe/Paris
Auditorium (Annecy-le-Vieux, France)

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Description

The 14th international workshop on the "Dark Side of the Universe 2018" will be held at LAPTh, Annecy, France. workshops bring together a wide range of theorists and experimentalists to discuss ideas on models of the dark side, and relate them to current and future experiments.

Topics covered include dark matter, dark energy, cosmic rays, cosmology,  gravitational waves, and physics beyond the standard model

Participants
• Alberto Sesana
• Alexander Pukhov
• Ali Murat GULER
• Anand Raichoor
• ANDREAS GOUDELIS
• Andrew Cheek
• Anirban Das
• Arata Aoki
• arianna di cintio
• Arnaud Lucotte
• Barbara Clerbaux
• Björn Herrmann
• Bryan Zaldivar
• Carlos Munoz
• Cedric Delaunay
• Celine Armand
• Christopher Eckner
• Chung-Lin SHAN
• Cláudio Frederico Pascoal Silva
• Csaba Balazs
• Da Huang
• Daniel E. Lopez-Fogliani
• Daniel G. Figueroa
• David Harvey
• Deanna Hooper
• Debtosh Chowdhury
• Doojin Kim
• Eric Aubourg
• Fabio Finelli
• Fawzi Boudjema
• Felix Kahlhoefer
• Francesca Calore
• Francesca Day
• Francesco A. Conventi
• Francesco Nuti
• Francis-Yan Cyr-Racine
• Frédéric Mayet
• Fumihiro Takayama
• Genevieve Belanger
• glenn robbins
• Guillaume Chalons
• Habiba BOUHALLOUF
• Hexi SHI
• Hong-Bo Jin
• Hyun Min Lee
• Ildus Nurgaliev
• James Battat
• Jan Hamann
• Jan Heisig
• Javier Redondo
• Jean-Baptiste Durrive
• Jinn-Ouk Gong
• Johannes Rothe
• John March-Russell
• Jonathan Blazek
• Jong-Chul Park
• Julien Billard
• Keisuke Yanagi
• Keith Olive
• Ki-Young Choi
• Laura Lopez Honorez
• Lawrence Hall
• Loïc Rolland
• Luigi Tedesco
• Marco Regis
• Marco Taoso
• Marcos A. Garcia Garcia
• Mathias Pierre
• Mathieu Boudaud
• Mathieu Perrin-Terrin
• Maíra Dutra
• Michael Korsmeier
• Mikhail Kirsanov
• Mirko Boezio
• Misao Sasaki
• Mounir Boussahel
• Nassim Bozorgnia
• Natsumi Nagata
• Nishita Desai
• Ottavia Balducci
• Paolo Gondolo
• Pasquale Dario Serpico
• Philip von Doetinchem
• Pier Simone Marrocchesi
• Pierre Salati
• Pyungwon Ko
• Ranny Budnik
• Rex Tayloe
• Riccardo Munini
• Robert Foot
• Sabine Kraml
• Shaaban Khalil
• Shohei Okawa
• Silvia Manconi
• Simone Sanfilippo
• Spyridon Argyropoulos
• Subharthi Ray
• Teresa Montaruli
• Tessa Baker
• Thomas Edwards
• Thomas Lacroix
• Tina Pollmann
• Valeriy Dvoeglazov
• Vincent BERTIN
• Vivian Poulin
• Xiang Li
• Y. Jack Ng
• Yann Mambrini
• Yvonne Wong
• Álvaro de la Cruz-Dombriz
• Monday, 25 June
• 08:30 09:00
Registration Grande Galerie ()

### Grande Galerie

• 09:00 09:20
Introduction Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
• 09:20 10:40
Dark matter and direct detection Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: S. Khalil
• 09:20
Where are the WIMPs? 40m
Speaker: Felix Kahlhoefer
• 10:00
Searching for low-mass dark matter with cryogenic detectors 40m
Speaker: Julien Billard
• 10:40 11:10
Coffee break Grande Galerie ()

### Grande Galerie

• 11:10 13:00
Dark matter direct detection phenomenology Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Paolo Gondolo
• 11:10
Effective theories for direct detection 40m
• 11:50
Impact of simulation results for DM searches 40m
Speaker: Nassim Bozorgnia
• 12:30
Self-consistent description of the dark matter velocity distribution: from galactic dynamics to phenomenology 20m

In the context of dark matter (DM) searches, it is crucial to quantify and reduce theoretical uncertainties affecting predictions that depend on the DM velocity distribution, including event rates in direct searches, velocity-dependent annihilation rates, and microlensing event rates for DM compact objects. The well-known Eddington inversion formalism for the self-consistent reconstruction of the DM velocity distribution from a Galactic mass model allows one to go beyond the simplistic Maxwellian approximation or direct fits to cosmological simulations. However, this method and its anisotropic extensions can be ill-defined depending on the DM and baryonic content of the galaxy of interest.

In this presentation, I will first discuss the validity range of the Eddington inversion methods from a theoretical perspective, as well as issues such as the impact of the finite boundary of a galactic system on observables relevant to DM searches. Then, even in their theoretical validity range, these methods must be tested against hydrodynamical cosmological simulations to assess their relevance for complex gravitational systems such as Milky-Way-like galaxies. I will therefore discuss the predictivity of these methods based on zoom simulations. Finally, as an application, I will present novel constraints on p-wave suppressed DM annihilation from positron data, and their associated theoretical uncertainties.

Speaker: Dr Thomas Lacroix (Laboratoire Univers & Particules de Montpellier)
• 13:00 14:30
Lunch 1h 30m University Restaurant ()

### University Restaurant

• 14:30 15:20
Dark matter candidates I Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Csaba Balazs (Monash University)
• 14:30
Susy DM 30m
Speaker: Keith Olive
• 15:00
Thermalisation and DM production 20m
Speaker: Yann Mambrini
• 15:20 16:00
Parallel I: Direct detection Petit Amphi ()

### Petit Amphi

Convener: Doojin Kim
• 15:20
Directional Search for Dark Matter Using Nuclear Emulsion 20m

A variety of experiments have been developed over the past decades, aiming at the detection of Weakly Interactive Massive Particles (WIMPs) via their scattering in an instrumented medium. The sensitivity of these experiments has improved with a tremendous speed, thanks to a constant development of detectors and analysis methods. Detectors capable of reconstructing the direction of the nuclear recoil induced by the WIMP scattering are opening a new frontier to possibly extend Dark Matter searches beyond the neutrino background. Exploiting directionality would also give a proof of the galactic origin of dark matter making it possible to have a clear and unambiguous signal to background separation. The NEWSdm experiment, based on nuclear emulsions, is a new experiment proposal intended to measure the direction of WIMP-induced nuclear recoils with a solid-state detector, thus with a high sensitivity. We discuss the discovery potential of a directional experiment based on the use of a solid target made of newly developed nuclear emulsions and novel read-out systems achieving nanometric resolution. We also report results of a technical test conducted in Gran Sasso.

Speaker: Ali Murat Guler
• 15:40
Latest results from the LUX Dark Matter Experiment 20m

LUX (Large Underground Xenon) was a 250 kg dual-phase (liquid/gas) xenon TPC with an active mass of 250 kg that operated at the Sanford Underground Research Facility (SURF) in the US, from 2013 until 2016. Its main objective was to look for evidence of galactic dark matter in the form of Weakly Interacting Massive Particles (WIMPs). During the full 427 live-days run, it excluded WIMP-nucleon spin-independent cross sections above 1.1×10$^{-46}$ cm$^2$ (90% confidence level) at a WIMP mass of 50 GeV/c$^2$. Due to its low radioactive and large sensitivity, LUX is able to look for other dark matter particle candidates and rare event signals. In this presentation, we will report the most recent results from several new data analyses such as: an effective field theory approach to explore a more general set of possible nuclear responses from WIMP-nucleon scattering, mirror dark matter searches with the electron recoil data, and searches for annual and diurnal rate modulations in the data. We will also present the most recent calibrations studies, such as i) pulse shape discrimination, ii) $^{14}$C beta calibrations, iii) nuclear recoil calibration using a pulsed D–D neutron generator. These calibrations are essential to the development of the next generation of dark matter detectors.

Speaker: Cláudio Silva (LIP Coimbra)
• 15:20 16:00
Parallel II: Dark Matter models Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Bryan Zaldivar (LAPTh, Annecy-le-Vieux)
• 15:20
Supersymmetric dark matter by GAMBIT 20m

Is supersymmetry loosing ground as a compelling explanation for dark matter? Or is there still enough experimental evidence to support our faith in supersymmetric dark matter? In search of quantitative answers, focusing on dark matter properties, I review the latest GAMBIT results for various supersymmetric models covering the CMSSM, NUHM1 and 2, MSSM7 and MSSM9.

Speaker: Csaba Balazs (Monash University)
• 15:40
LHC and dark matter signals motivated by the $\mu\nu$SSM 20m
Speaker: Daniel Lopez-Fogliani
• 16:00 16:30
Coffee break Grande Galerie ()

### Grande Galerie

• 16:30 18:10
Parallel I: Direct detection Petit Amphi ()

### Petit Amphi

Convener: Doojin Kim
• 16:30
Direct dark matter search with DEAP-3600 20m

DEAP-3600 is a single-phase liquid-argon Dark Matter direct detection experiment located 2 km underground at SNOLAB, in Sudbury, Canada. With a 1 tonne fiducial mass, the target sensitivity to spin-independent scattering of 100 GeV weakly interacting massive particles (WIMPs) is 10^{-46} cm^2. The detector was designed and built to reach a background level of less than 0.6 events in 3 tonne-years exposure. This included designing all parts of the detector to prevent or veto backgrounds, radio-purity screening for all detector materials, working with suppliers to source radio-pure materials, and using construction techniques that limit contaminations with radio-isotopes. The largest remaining background - beta decays from Ar-39 - is mitigated offline through pulse shape analysis. DEAP-3600 has been taking physics data since late 2016. This talk presents first results and the status of the experiment.

Speaker: Tina Pollmann (Technische Universität München)
• 16:50
Low-mass dark matter search with the CRESST-III experiment 20m
Speaker: Johannes Rothe
• 17:10
DANAE - a new experiment for direct dark matter detection with DEPFET silicon detector. 20m
Speaker: Hexi Shi
• 17:30
Search for dark matter with the SABRE experiment 20m

The Sodium-iodide with Active Background REjection (SABRE) experiment is designed to search for the annual modulation of dark matter interaction rate with NaI(Tl) crystals. The experiment will also be able to perform a conclusive model-independent test of the notorious DAMA/LIBRA annual modulation signal. This signal is compatible with the WIMP-nucleon scattering hypothesis, but it is in contrast with observations from different-target dark matter experiments. SABRE will perform a high sensitivity search using NaI(Tl) crystals with unprecedented radio-purity operated inside a liquid scintillator veto for active background rejection. The project comprises twin detectors located in the northern and southern hemispheres to identify any possible contribution to the modulation from seasonal or site-related effects.
In the first phase of the experiment, the SABRE Proof-of-Principle (PoP), a single 5 kg crystal detector is hosted in a liquid scintillator filled vessel at the Laboratori Nazionali del Gran Sasso. This phase is underway with the aim to measure the crystal background, to test the active background rejection system, and to validate the SABRE concept.
This talk will illustrate the concept of the SABRE experiment and will present the latest estimate of the background for the SABRE Proof-of-Principle. Assuming such background model, the sensitivities of the experiment to spin-independent WIMP-nucleon scattering and to the DAMA/LIBRA modulation are assessed.

Speaker: Francesco Nuti (The University of Melbourne)
• 17:50
Signal Diversity in Dark Matter Searches from Information Geometry 20m
Speaker: Thomas Edwards (GRAPPA, Amsterdam)
• 16:30 18:10
Parallel II: Dark Matter models Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Bryan Zaldivar (LAPTh, Annecy-le-Vieux)
• 16:30
Radiative corrections to the Relic Density in the IDM 20m

The current experimental precision from PLANCK on the extraction of the relic abundance of Dark Matter calls for very precise prediction from the theory side to be able to extract meaningful information. In this study we compute the full set of radiative corrections entering the calculation of the relic density of Dark Matter in the Inert Doublet Model and weigh their impact on its prediction in well motivated regions of parameter space. The calculation is performed with the help of the SloopS code, an automatic code for predictions beyond leading order in cosmology, astrophysics and cosmology.

Speaker: Guillaume Chalons (LPSC-IN2P3-CNRS)
• 16:50
Moduli Portal Dark Matter 20m

Supergravity and string theories usually have particles, such as a modulus, with only gravitational interactions. These moduli fields arise due to the flat directions in the above theories. We inspect the possibility that these moduli fields acting as a mediator between the dark sector and the Standard Model, from an effective field theory perspective. We show that in this scenario, dark matter can be efficiently produced via freeze-in mechanism during the reheating epoch. We delineate the regions where this portal is efficient by varying the modulus mass relative to the temperatures attained during the reheating process.

Speaker: Debtosh Chowdhury (CPHT, Ecole Polytechnique)
• 17:10
Dynamical EW symmetry breaking via multiple bosonic seesaw 20m
Speaker: Shohei Okawa (TUM, Munich)
• 17:30
SuperIso Relic new extensions for direct and indirect detection 20m

SuperIso Relic is a public computing program for the calculation of flavour observables and relic density in supersymmetry (MSSM and NMSSM). We present new extensions of the code dedicated to the calculation of dark matter direct and indirect detection constraints from the latest experiment results. After presenting the new features of the program in particular the treatment of the relevant uncertainties, I will show some exemplified results and implications.

Speaker: Glenn Robbins (CRAL)
• 17:50
Dark matter searches with cosmic-ray antideuteron and antihelium 20m
Speaker: Michael Korsmeier
• Tuesday, 26 June
• 09:00 11:00
Direct detection and dark matter candidates II Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
• 09:00
Recent results from Xenon 40m
Speaker: Ranny Budnik
• 09:40
Axion and ALP dark matter and searches 40m
Speaker: Javier Redondo
• 10:20
Dark Matter and the Strong CP problem 40m
Speaker: Lawrence Hall
• 11:00 11:30
Coffee break Grande Galerie ()

### Grande Galerie

• 11:30 12:50
Dark matter candidates III Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
• 11:30
DM and freeze-in 20m
Speaker: Andreas Goudelis
• 11:50
SIMP and SIDM 20m
Speaker: Hyun Min Lee
• 12:10
Long range interactions and dark matter 20m

Dark matter interacting through a light mediator arises in many extensions of the Standard Model. This scenario has been proposed for several phenomenological reasons, in particular to enhance dark matter self-interactions and solve the putative discrepancies between collisionless cold DM and observations of galactic structures.
I will discuss several phenomenological consequences showing that a variety of indirect detection constraints (gamma-rays, CMB, anti-protons) severely constrain such model.
Then I will consider the possibility of an asymmetry in the dark matter sector. I will show that, contrary to the common lore, detectable annihilations occur even for large asymmetries. I will discuss the possibility to test this scenario with direct and indirect searches.

Speaker: Marco Taoso (INFN Torino)
• 12:30
Neutrino-nucleus scattering in COHERENT 20m
Speaker: Rex Tayloe
• 12:50 14:30
Lunch 1h 40m University Restaurant ()

### University Restaurant

• 14:30 16:10
Dark matter searches at colliders Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Fawzi Boudjema (LAPTh)
• 14:30
DM searches with monoX and other exotic searches at LHC 30m
Speaker: Barbara Clerbaux
• 15:00
DM searches in SUSY and other UV complete models at LHC 30m
Speaker: Francesco Conventi
• 15:30
Search for subGeV dark sector particles with NA64 experiment at the CERN SPS 20m
Speaker: Mikhail Kirsanov
• 15:50
Exotic particles NA62 20m
Speaker: Mathieu Perrin-Terrin (CPPM, Marseille)
• 16:10 16:30
Coffee break Grande Galerie ()

### Grande Galerie

• 16:30 17:50
Parallel I: Dark matter models at colliders Petit Amphi ()

### Petit Amphi

Convener: Y. Mambrini
• 16:30
Use and limitations of simplified-model constraints from the LHC 20m

Simplified models have become one of the standard methods to interpret searches for new physics at the LHC. They reduce full models with dozens of particles and a plethora of parameters to subsets with just a handful of new states. The virtue of simplified model spectra (SMS), namely that a full model decomposes into many different SMS, also defines their main challenge: depending on the complexity of the mass and decay patterns, a full model may not be fully reconstructed by SMS.

In this talk, I present SModelS, an automatised public tool for interpreting simplified model results from LHC SUSY searches. I explain the working principle and how SModelS can be used -standalone or interfaced with micrOMEGAs- to a) constrain SUSY and non-SUSY models of new physics and b) identify interesting channels for which no SMS results are available. Finally, I address the limitations of the approach, that is to what extent full models can indeed be constrained by SMS results.

Speaker: Sabine Kraml (LPSC Grenoble)
• 16:50
Next-to-minimal dark matter at the LHC 20m

We examine the collider signatures of a WIMP dark matter scenario comprising a singlet fermion and an SU(2) n-plet fermion, with a focus on n=3 and n=5. The singlet and n-plet masses are of the order of the electroweak scale. The n-plet contains new charged particles which will be copiously pair-produced at the LHC. Small mixing angles and near-degenerate masses, both of which feature naturally in these models, give rise to long-lived particles and their characteristic collider signatures. In particular, the n=5 model can be constrained by displaced lepton searches independently of the mixing angle, generically ruling out 5-plet masses below about 280 GeV. For small mixing angles, we show that there is a parameter range for which the model reproduces the observed thermal relic density but is severely constrained by disappearing track searches in both the n=3 and the n=5 cases. The n=3 model is further constrained by soft di-lepton searches irrespectively of whether any new particles are long-lived.

Speaker: Nishita Desai (L2C & LUPM)
• 17:10
Scalar versus vector dark matter 20m

We investigate and compare two simple models of dark matter (DM): a vector and a scalar DM. In the former case an extra gauged group factor $U(1)$ is introduced, and the DM is the corresponding massive gauge boson $A_X^\mu$. The $U(1)$ symmetry is spontaneously broken by a vacuum of an extra scalar complex field $S$. Dark charge conjugation $A_X^\mu\to -A_X^\mu$ with $S \to S^*$ is responsible for stabilization of DM. In the latter case the gauge group remains standard, but an extra scalar complex field $S$ is also introduced. The DM is an imaginary part of $S$ and the stabilizing symmetry is also the dark charge conjugation $S \to S^*$. In this case, in order to avoid spontaneous breaking, the $U(1)$ symmetry is broken explicitly, but softly, in the scalar potential. The possibility to disentangle the two models has been investigated.

Speaker: Bohdan Grzadkowski (University of Warsaw)
• 17:30
Flavourful $Z′$ portal for vector-like neutrino Dark Matter and $R_{K^{(∗)}}$ 20m

We discuss a flavourful $Z'$ portal model with a coupling to fourth-family singlet Dirac neutrino dark matter. In the absence of mixing, the $Z′$ is fermiophobic, having no couplings to the three chiral families, but does couple to a fourth vector-like family. Due to mixing effects, the Z′ gets induced couplings to second family left-handed lepton doublets and third family left-handed quark doublets. This model can simultaneously account for the measured $B$-decay ratios $R_K$ and $R_{K^*}$ and for the observed relic abundance of dark matter. We identify the parameter space where this explanation is consistent with existing experimental constraints from dark matter direct and indirect detection, LHC searches, and precision measurements of flavour mixing and neutrino processes.

Speaker: Mathias Pierre (LPT Orsay)
• 16:30 17:50
Parallel II: Indirect dark matter searches Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Francesca Calore (LAPTh, CNRS)
• 16:30
Constraining Galactic dark matter with gamma-ray pixel counts statistics 20m

The investigation of the composition of the extra-galactic gamma-ray background (EGB) is a powerful tool to search for dark matter signals in the gamma-ray sky. In the last few years, statistical analysis methods have been demonstrated to outperfom classic detection methods in decomposing the EGB. In particular, the 1-point photon counts statistics (1pPDF) permits to resolve the population of extra-galactic point sources and to decompose the diffuse components into Galactic foreground and isotropic background emissions.
For the first time, we extend this analysis to include a potential contribution from dark matter annihilating in the Galactic dark matter halo. In this contribution I will discuss the sensitivity reach of 1pPDF analysis for the dark matter thermally-averaged self-annihilation cross section when applied to eight years of Fermi-LAT data between 1 and 10 GeV.

Speaker: Silvia Manconi (University of Turin)
• 16:50
Probing the Nature of Dark Matter with Gamma Rays: Prospects for the Cherenkov Telescope Array at the Galactic Center 20m

Revealing the nature of dark matter is one of the most riveting open tasks of modern astronomy and cosmology. To this end, observing and analyzing high-energy gamma-rays provides a promising and highly-effective tool which is, in particular, well-suited to constrain Weakly Interacting Massive Particle (WIMP) models.
Being currently in its pre-construction phase, the Cherenkov Telescope Array (CTA) will soon observe the high-energy gamma-ray sky in the 20 GeV - 300 TeV energy range. Thus, it will open the possibility to explore the parameter space of heavy dark matter (above 100 GeV) with unprecedented sensitivity.
One of the main targets for searches for signals of dark matter annihilation or decay is the center of our Galaxy. Due to its lower energy threshold and significantly larger effective area when compared to the current generation of ground-based Cherenkov telescopes, the CTA is expected to be sensitive to diffuse astrophysical emission which is present in that region.
In this talk, we present the status of the collaboration effort to estimate the sensitivity of CTA to various diffuse gamma-ray components in the surroundings of the Galactic Center. Moreover, based on the astrophysical emission observed with the LAT at lower energies, we report on the impact of these diffuse astrophysical emission backgrounds on dark matter searches and suggest promising data analysis and observational strategies for the upcoming CTA data.

Speakers: Christopher Eckner (University of Nova Gorica), for the CTA Consortium
• 17:10
Constraining TeV-scale dark matter with cosmic-ray antiprotons 20m

osmic-ray observations provide a powerful probe of dark matter annihilation in the Galaxy. In this paper we derive constraints on heavy dark matter from the recent precise AMS-02 antiproton data. We consider all possible annihilation channels into pairs of standard model particles. Furthermore, we interpret our results in the context of minimal dark matter, including higgsino, wino and quintuplet dark matter. We compare the cosmic-ray limits to limits from γ-ray observations of dwarf spheroidal galaxies and, for the specific case of minimal dark matter, to limits from γ-line observations of the Galactic center. While the latter limit is highly dependent on the dark matter density distribution and only excludes a thermal wino for cuspy profiles, the cosmic-ray limits are more robust, strongly disfavoring the thermal wino dark matter scenario even for a conservative estimate of systematic uncertainties.

Speaker: Dr Jan Heisig (RWTH Aachen University)
• 17:30
Astrophysical background and dark matter implication based on latest AMS-02 data 20m

The cosmic ray(CR) positrons and antiprotons are often regarded as the products of collisions of CR nucleons with the interstellar medium. However this conclusion is challenged by recent experimental data. In this work, we choose the latest AMS-02 data to analyze the astrophysical background of CR positrons and antiprotons based on the GALPROP code for CR propagation and QGSJET-II-04 for hadronic CR interactions. The results show that in low energies the flux of CR antiprotons is consistent with AMS-02 data, and the over-predicted flux of CR positrons is well reduced in a diffusion model combining the re-acceleration and convection terms.
Using this model, the calculated flux of CR protons is consistent with AMS-02 data with the hardening feature above 330 GeV. Based on this model, using the total fluxes of CR electrons and positrons from AMS-02, interpretation of dark matter annihilation on the positron excess are also analyzed.

Speaker: Hong-Bo Jin (National Astronomical Observatories, Chinese Academy of Sciences)
• 18:30 20:30
Reception at Annecy-le-Vieux Townhall 2h Townhall (Annecy-le-Vieux)

### Townhall

#### Annecy-le-Vieux

• Wednesday, 27 June
• 09:00 10:50
Dark matter indirect detection I Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Pierre SALATI (Laboratoire d'Annecy-le-Vieux de Physique Théorique LAPTH)
• 09:00
Multimessenger dark matter searches 40m
Speaker: Marco Regis
• 09:40
PAMELA experiment: cosmic rays deep inside the heliosphere 25m
Speaker: Riccardo Munini
• 10:05
Antinuclei in cosmic rays 25m
Speaker: Philip Von Doetinchen
• 10:30
Indirect detection with antiprotons 20m
Speaker: Mathieu Boudaud
• 10:50 11:10
Coffee break Grande Galerie ()

### Grande Galerie

• 11:10 13:00
Dark matter indirect detection II Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Prof. Keith Olive (University of Minnesota)
• 11:10
CALET Results 30m
Speaker: Pier Simone Marrocchesi
• 11:40
DAMPE Results 30m
Speaker: Li Xiang
• 12:10
IceCube observations on the cosmos 30m

IceCube, the cubic-kilometre neutrino telescope at the South Pole, is observing the sky with sensors embedded at more than 1.5 km depth. We describe recent findings of the experiment in standalone and in multi-messenger mode concerning time-dependent and independent searches of cosmic-ray sources. We also describe the results on indirect dark matter searches.

Speaker: Prof. Teresa Montaruli (University of Geneva)
• 12:40
Indirect Search for Dark Matter with the ANTARES and KM3NeT Neutrino Telescopes 20m

The ANTARES detector is the largest water Cherenkov neutrino telescope in the Northern hemisphere, installed in the Mediterranean Sea offshore France. It has been continuously taking data for more than ten years.

One major goal of ANTARES is the search for high energy neutrinos potentially produced by self-annihilation of Dark Matter particles trapped in massive objects such as the Sun or the Galactic Centre. Latest results of ANTARES on the indirect search for Dark Matter towards the Sun, the Earth and the Galactic Centre are presented. In particular, the results obtained by ANTARES on Dark Matter searches towards the Galactic Centre lead to the most stringent limits on the annihilation cross-sections for high mass WIMPs.

Finally, preliminary sensitivities on indirect search for Dark Matter with KM3NeT, the next generation neutrino telescope already under construction in the Mediterranean Sea, are also presented.

Speaker: Vincent Bertin (CPPM)
• 13:00 14:30
Lunch 1h 30m University Restaurant ()

### University Restaurant

• 14:30 15:10
Dark matter indirect detection III Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
• 14:30
X-ray polarimetry 20m
Speaker: Francesca Day
• 14:50
Dark energy stars 20m
Speaker: Paolo Gondolo
• 15:10 19:00
Excursions 3h 50m Annecy

#### Annecy

• Thursday, 28 June
• 09:00 11:00
Cosmology I Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Laura Lopez Honorez (Univ. Libre de Bruxelles Belgium)
• 09:00
Cosmological probes of dark matter 40m
Speaker: Francis-Yan Cyr-Racine
• 09:40
Cosmology and neutrinos 40m
Speaker: Yvonne Wong
• 10:20
Status of Inflationary models after PLANCK 40m
Speaker: Fabio Finelli
• 11:00 11:30
Coffee break Grande Galerie ()

### Grande Galerie

• 11:30 13:00
Cosmology II Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Jan Hamann (CERN)
• 11:30
LSST/Euclid future surveys 40m
Speaker: Eric Aubourg
• 12:10
Cluster cosmology with the NIKA2 camera at the IRAM 30-m telescope 20m

The main limiting factor of cosmological analyses based on thermal Sunyaev-Zel’dovich (SZ) cluster statistics comes from the bias and systematic uncertainties that affect the estimates of the mass of galaxy clusters. High-angular resolution SZ observations at high redshift are needed to study a potential redshift dependence of the cluster mass-observable scaling relation used in SZ cosmological analyses.
The NIKA2 camera is a new generation continuum instrument installed at the IRAM 30-m telescope. The combination of a large field of view (6.5 arcmin), a high angular resolution (17.7 arcsec), and a high-sensitivity of 8 mJy.s1/2 at 150 GHz provides the NIKA2 camera with unique SZ mapping capabilities. The NIKA2 SZ observation program will allow us to observe a large sample of clusters (50) at redshifts between 0.5 and 1.

I will present the characterization of the first NIKA2 SZ observations of a galaxy cluster at the IRAM 30-m telescope. I will then describe the ongoing SZ observation program with the NIKA2 camera and emphasize the synergy between the high quality NIKA2 SZ and XMM-Newton X-ray data for the calibration of the mass-obervable scaling relation at high redshift.

Speaker: Frédéric Mayet (LPSC Grenoble)
• 12:30
Apollo 20m
Speaker: James Battat
• 12:50
DSU 2019 10m
Speaker: Daniel Lopez-Fogliani
• 13:00 14:30
Lunch 1h 30m University Restaurant ()

### University Restaurant

• 14:30 16:10
Cosmology III Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Frédéric Mayet (LPSC Grenoble)
• 14:30
DM haloes, open problems, perspectives 40m
Speaker: Arianna Di Cintio
• 15:10
Innovative methods to probe new models of dark matter in Clusters of Galaxies 20m

In a bid to unveil the illusive fundamental properties of dark matter, physicists are being forced to look beyond the standard model and develop both new theoretical models and observational methods. In this talk I shall present exciting new results from observations and state-of-the-art simulations that exploits the largest structures in the known Universe, galaxy clusters to study the the dark matter self-interaction cross-section in a whole new way. This fundamental property, which has the discriminatory power to rule out large swathes of dark matter models has become of great interest in the last decade and these results could be another step closer to understanding exactly what this mysterious matter could be.

Speaker: David Harvey (EPFL)
• 15:30
A fresh look into the interacting dark matter scenario 20m
Speaker: Laura Lopez Honorez
• 15:50
Role of the SM Higgs boson in the DM searches at colliders 20m

I show that the SM Higgs boson can play an important role for the fermion or vector dark matter with Higgs portal interactions, because of the SM gauge invariance and unitarity, unlike the usual simplified models that includes only the singlet scalar mediator. I demonstrate how the ATLAS and the CMS bounds from the mono jet + missing $E_T$ and $t\bar{t}$ + missing $E_T$ on the DM models are modified when the effects of the SM Higgs boson is correctly included. Then I will discuss prospects for discovery and the spin discrimination of these DM models at the current and the future high energy colliders.

Refs: Based on arXiv:1712.05123,arXiv:1610.03997 (and also arXiv:1705.02149, arXiv:1701.04131, arXiv:1506.06556 )

Speaker: Pyungwon Ko (KIAS)
• 16:10 16:40
Coffee break Grande Galerie ()

### Grande Galerie

• 16:40 18:40
Parallel I: Cosmology Petit Amphi ()

### Petit Amphi

Convener: Pasquale Dario Serpico (LAPTh, Annecy-le-vieux)
• 16:40
Optimal and accurate cosmology from the Dark Energy Survey and beyond 20m

We are in the midst of an exciting time for understanding the dark sector of the Universe. Current and upcoming projects, including DES, LSST, and Euclid are observing an unprecedented number of galaxies and other astrophysical objects. It is critical to develop robust strategies that fully utilize this statistical power to extract cosmological information. I will present recent work connecting these observations to the underlying cosmological and astrophysical processes. In particular, I will discuss an analytic framework that maps between the behavior of dark matter and dark energy and the observed positions and shapes of galaxies (or any other luminous tracer). I will describe how this framework can be used in joint analyses of multiple probes or data sets, highlighting recent results from DES as an example.

Speaker: Jonathan Blazek (EPFL and OSU)
• 17:00
Cosmology with recent and future massive spectroscopic surveys: eBOSS and 4MOST/CRS 20m

Massive spectroscopic surveys are a key-component of the cosmological experiments, constraining the dark energy with the measurement of the Baryon Acoustic Oscillation (BAO) scale, but also the General Relativity on cosmological scales through redshift-space distortion (RSD) measurements, or the summed mass of all neutrino species.
I will first present latest results from the SDSS/eBOSS survey (2014-2019, ~1 million spectra over 7500 deg2), which is focusing on the [0.6,2.2] redshift range. I will then introduce the 4MOST/CRS survey (2021-2026) which will observe 20 million spectra for redshifts within 0 and 3, over 14,000 deg2, to map the three-dimensional matter distribution. 4MOST/CRS will thus be a reference survey over the Southern Sky.

Speaker: Anand Raichoor (EPFL)
• 17:20
Fuzzy dark matter and Planck 20m
Speaker: Arata Aoki
• 17:40
Modified dark matter: relating dark energy, DM and baryonic matter 20m
Speaker: Y. Jack Ng
• 18:00
Birkhoff theorem in theories with torsion 20m

In this talk I will present some recent results about the Birkhoff theorem in theories of gravity with non-vanishing torsion. Specifically, I will consider the most general quadratic Lagrangian, which depends on 9 parameters. Then, I will show that under some combination of the parameters, we can new theories in which the Birkhoff theorem holds. Moreover, other combinations allow us to find vacuum solutions different from Schwarzschild, that were not present in previous literature. Finally, I will explain the relation of these results with the stability conditions in these theories.

Speaker: F.J. Maldonado Torralba (University of Cape Town)
• 16:40 18:40
Parallel II: Dark matter direct detection Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Hyun Min Lee
• 16:40
One loop direct detection 20m
Speaker: Natsumi Nagata
• 17:00
Direct detection of exothermic dark matter with light mediator 20m

In this talk, we study the possible models trying to reconcile the tension between the CDMS-Si signals and null experiments. In particular, we focus on the models with the following properties: isospin-violating couplings, exothermic scatterings, and/or a light mediator. In the light of the latest constraints from LUX, PandaX-II, XENON1T, CDMSlite and PICO-60, we find that, for almost all the considered models, the predicted CDMS-Si signal regions are either severely constrained or completely excluded, including the previously promising Xe-phobic exothermic DM models with/without a light mediator.

Speaker: Dr Da Huang (University of Warsaw)
• 17:20
Boosted dark matter and surface detector 20m
Speaker: Jong-Chul Park
• 17:40
Direct detection of mirror dark matter 20m
Speaker: Robert Foot
• 18:00
Surrogate Models for Direct Dark Matter Detection 20m

This talk will introduce the use of surrogate model techniques for direct detection of dark matter. We have developed a tool, RAPIDD, that replaces the exact calculation of the dark matter differential rate (which in general involves up to three nested integrals) with a much faster parametrization in terms of ordinary polynomials of the dark matter mass and couplings, obtained in an initial training phase. Based on the work presented in arXiv:1802.03174, we explore the need and benefit of doing direct detection calculations differently, increasing speed vastly and sacrificing very little in terms of accuracy. We will exhibit the general analysis that these methods enable us to do, requiring larger than usual dimensionality and including astrophysical uncertainties. RAPPID is particularly well suited to analysis that demands high-dimensional parameter spaces and a large number of evaluations.

Speaker: Andrew Cheek (Durham, IPPP)
• 18:20
Inelastic boosted dark matter at protoDUNE 20m
Speaker: Doojin Kim
• 19:00 22:00
Social dinner Espace Lac (Annecy Lake)

### Espace Lac

#### Annecy Lake

Talloires
• Friday, 29 June
• 09:00 11:00
Gravitational Waves and Black Holes Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Subhendra Mohanty (Physical Research Laboratory, Ahmedabad)
• 09:00
LIGO/Virgo Results 40m
Speaker: Loic Rolland
• 09:40
Perspectives of gravitational waves: LISA &PTA 40m
Speaker: Alberto Sesana
• 10:20
Primordial Black holes 40m
Speaker: Misao Sasaki
• 11:00 11:30
Coffee break Grande Galerie ()

### Grande Galerie

• 11:30 13:10
Gravitational Waves and Modified Gravity Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
• 11:30
Gravitational-Wave Signals in Extended Theories of Gravity 20m

Once the Einsteinian paradigm is abandoned, the phenomenology of neutron stars changes dramatically since neutron-star masses can be much larger than their General Relativity counterparts. Consequently, the total energy available for radiating gravitational waves could be of the order of several solar masses, and thus a merger of these stars constitutes a privileged wave source. This opens the door to a careful study of novel gravitational-wave signals as extracted from extended theories of gravity.

Speaker: Dr Álvaro de la Cruz-Dombriz (University of Cape Town)
• 11:50
Cosmological Backgrounds of Gravitational Waves 40m
Speaker: Daniel G. Figueroa
• 12:30
Modified Gravity: the current landscape 40m
Speaker: Tessa Baker
• 13:10 14:30
Lunch 1h 20m Grande Galerie ()

### Grande Galerie

• 14:30 16:10
Parallel I: Particle Cosmology Petit Amphi ()

### Petit Amphi

• 14:30
Asymptotic Scale Invariance, Electroweak Vacuum Stability and Higgs Inflation 20m

We discuss a possibility that our electroweak vacuum is absolutely stable even if the top Yukawa coupling is larger than the critical value. Such a scenario can be realized without introducing new particles if we adopt a renormalization prescription which respects the asymptotic scale invariance at the quantum level. Instead, the theory becomes non-renormalizable and the perturbative unitarity is violated at some energy scale. We argue that the perturbative computation of the Higgs effective potential is still justified and hence the quantum scale invariance can actually stabilize our vacuum. We also discuss the Higgs inflation with uncertainties coming from the violation of the perturbative unitarity.

• 14:50
Are dark matter interactions ruled out? 20m
Speaker: Deanna Hooper
• 15:10
CMB constraints on light primordial black holes 20m
Speaker: Jan Hamann (CERN)
• 15:30
Updated observational constraints on quintessence Dark Energy models 20m

The recent GW170817 measurement favors the simplest Dark Energy models, such as a single scalar field. Quintessence models can be classified in two classes, freezing and thawing, depending on whether the equation of state decreases towards −1 or departs from it. In this work we put observational constraints on the parameters governing the equations of state of tracking freezing, scaling freezing and thawing models using updated data, from the Planck 2015 release, Joint Light-Curve Analysis and Baryonic Acoustic Oscillations. Because of the current tensions on the value of the Hubble parameter H0 , unlike previous authors, we let this parameter vary, which modifies significantly the results. Finally, we also derive constraints on neutrino masses in each of these scenarios.

Speaker: Jean-Baptiste Durrive (Univ. Nagoya)
• 14:30 16:10
Parallel II: Dark matter models II Auditorium

### Auditorium

#### Annecy-le-Vieux, France

9 chemin de Bellevue
Convener: Cédric Delaunay
• 14:30
Baryogenesis from non-thermal wimp 20m
Speaker: Ki-Young Choi
• 14:50
SIDM with a light mediator in a gauged U(1) Lmu-Ltau model 20m
Speaker: Keisuge Yanagi
• 15:10
Nonperturbative Effects in Late Time Dark Matter Phenomenology 20m

Self-interacting dark matter is a promising candidate for solving the small-scale problems in the standard model of cosmology. A natural consequence of having self-interactions among dark matter particles is the Sommerfeld effect which can affect both the annihilation and self-scattering rates of dark matter particles. I shall show that as a result of the Sommerfeld effect, caused by a long-range off-diagonal interaction, the dark matter annihilation signal from the Milky Way center is preferentially enhanced by several orders of magnitude. This result can have important implication for indirect detection searches. I shall also explain this result with the help of simple particle exchange symmetry. The same interaction also predicts a faster dark matter halo cooling rate and a new drag force induced by large inelastic scattering. It could potentially modify the late time dynamics of the halos.

Speaker: Anirban Das (Tata institute of Fundamental Research)
• 15:30
Enhancement of the dark matter abundance before reheating: thermal and non-thermal production 20m

In the first stages of inflationary reheating, the temperature of the radiation produced by inflaton decays is higher than the commonly defined reheating temperature $T_R$. At these temperatures particle production can be significantly enhanced. Furthermore, in the earliest stages of reheating, before thermalization takes place, scattering of the inflaton decay products with momenta comparable to the inflaton mass can further enhance the particle production rate relative to the thermal one.

I will discuss these effects in a high scale supersymmetry model in which the only supersymmetric state below the inflationary scale is the gravitino, which plays the role of the dark matter particle. In such scenario, the thermal and non-thermal enhancement dominates over the dilution by the later generation of entropy near $T_R$, leading to a relic abundance that is sensitive to the maximum temperature of the Universe, set by the time scale of thermalization.

Speaker: Marcos A. Garcia Garcia (Rice University)
###### Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×