53rd Rencontres de Moriond - EW 2018

Session

Wednesday afternoon: Dark Matter (cntd)

S8

14 mars 2018, 17:00

131. New Probes for Low-Mass Dark Matter, Dark Bosons and Neutrino-Mediated Forces

Yevgeny Stadnik (Johannes Gutenberg University of Mainz)

14/03/2018 17:00

Ordinary

Low-mass bosonic dark matter particles produced after the Big Bang may form an oscillating classical field, which can be sought for in a variety of low-energy laboratory experiments based on spectroscopic, interferometric and magnetometric techniques, as well as in astrophysical phenomena. Dark bosons can also mediate anomalous fifth forces between ordinary-matter particles. Recent...

199. NEWS-G, Light dark matter search with a Spherical Proportional Counter, First results and Future prospects

Ioannis Katsioulas (Universite Paris-Saclay, CEA Saclay, IRFU)

14/03/2018 17:20

Ordinary

NEWS-G (New Experiments With Spheres-Gas) is an innovative experiment aiming to shine a light on the dark matter conundrum using a novel gaseous detector, the Spherical Proportional Counter. It uses light noble gases, such as Hydrogen, Helium, and Neon, as targets, to search for Weakly Interacting Massive Particles (WIMPs) down to the sub-GeV/c${}^2$ mass region. The first detector of NEWS-G...

146. Extra Dimensions are Dark

Dr Thomas Rizzo (SLAC)

14/03/2018 17:40

Ordinary

Extra dimensions (ED) can provide a useful tool for model-building. In this paper we introduce a single, flat ED extension of the kinetic-mixing/dark photon (DP) portal for dark matter (DM)
interactions with the Standard Model (SM) assuming a compactification `radius' of order $R^{-1}\sim 10-1000$ MeV and examine the resulting modifications to and augmentation of the
usual DP...

139. The First Experimental Results from the Axion Dark Matter Experiment Generation 2.

Dr Nathan Woollett (Lawrence Livermore National Laboratory)

14/03/2018 18:00

Ordinary

The QCD axion is a natural consequence to the Peccei-Quinn solution to the Strong-CP problem and also happens to be a natural dark matter candidate. The first run of the Gen 2 campaign with the Axion Dark Matter Experiment (ADMX) has searched for QCD axions with mass in the few ueV range with unprecedented sensitivity. This talk will discuss how cryogenic operating conditions with...

134. Hunting for Axionlike Dark Matter by Searching for an Oscillating Neutron Electric Dipole Moment

Nicholas Ayres (University of Sussex)

14/03/2018 18:40

YSF (Young Scientists Forum)

Mr. N. J. Ayres on behalf of the PSI nEDM Collaboration

Axions and axion-like particles (ALPs) are popular dark matter candidates. Ultralight axion and ALP cold dark matter could manifest as a classical-like field, oscillating coherently on a galactic scale. Through their couplings to gluons, this field would induce an oscillation in the measured value of the electric dipole moments of...

140. Relic density of dark matter revisited

Andrzej Hryczuk (University of Oslo)

14/03/2018 19:00

Ordinary

Kinetic decoupling of dark matter (DM) typically happens much later than chemical freeze-out. In fact, local thermal equilibrium is an important assumption for the usual relic density calculations based on solving the Boltzmann equation [for its 0-th moment] describing the DM number density. But is this assumption always justified? In this talk I will address this question and discuss the...

182. Colored dark matter

Andrea Mitridate (Scuola Normale Superiore)

14/03/2018 19:20

Ordinary

We explore the possibility that Dark Matter is the lightest hadron made of two stable color octet Dirac fermions $Q$. The cosmological DM abundance is reproduced for $M_Q\approx 9.5$ TeV, compatibly with direct, indirect and collider searches. Hybrid hadrons, made of $Q$ and of SM quarks and gluons, have large QCD cross sections, and do not reach underground detectors. Their cosmological...