IRN Terascale @ Marseille, Luminy

Session

Beyond the Standard Model

25 oct. 2023, 14:00

Amphitheater Hexagone/CPPM (Luminy)

3. Accidentally light scalars from large representations

Giacomo Ferrante (LUPM)

25/10/2023 14:00

BSM

In models with spontaneous symmetry breaking by scalar fields in large group representations, we observe that some of the scalar masses can be loop-suppressed with respect to the naive expectation from symmetry selection rules. We present minimal models -- the SU(2) five-plet and SU(3) ten-plet -- with such accidentally light scalars, featuring compact tree-level flat directions lifted by...

4. Asymptotic Grand Unification

Giacomo Cacciapaglia (IP2I Lyon)

25/10/2023 14:22

BSM

Asymptotic Grand Unification (aGUT) is an alternative unification paradigm where coupling tend to the same UV fixed point. Models can be constructed in 5 dimensions with a single bulk gauge group. I will present a pathway to classify aGUT models, and apply it to SU(N) in the bulk. Only two models are viable, based on SU(6) and with one Higgs doublet stemming from the gauge fields. I will also...

12. Composite Hybrid Inflation : Dilaton and Waterfall Pions

Wanda Isnard (ENS de Lyon / IP2I)

25/10/2023 14:44

BSM

We investigate the possibility that inflation originates from a composite field theory, in terms of an effective chiral Lagrangian involving a dilaton and pions. It is possible to find a successful hybrid inflation occurring via the dilaton as the inflaton and the pions as waterfall fields. Compositeness consistency strongly constrain the model such as the composite scale and the inflation...

14. Global interpretation of EDMs

Nina Marie Elmer

25/10/2023 15:06

BSM

We present preliminary results for a global analysis in the low-energy EDM sector. This includes eleven measurements from the paramagnetic and diamagnetic sector and the neutron measurement. Furthermore we investigate their influence on a set of seven model parameter. Tests have shown that not all measurements are constraining the parameter set equally well, with only some leading to...

8. Is the muon a third family lepton?

Aldo Deandrea (IP2I - Université Lyon 1)

25/10/2023 15:28

BSM

We discuss a new possible family structure for the Standard Model, where the muon is assigned to the third family. This has no consequence in the Standard Model itself, were this assignment is simply a matter of convention. However in physics beyond the Standard Model this reveals potentially meaningful patterns in the masses and mixings, while pointing to precise and testable predictions for...

11. Enhancing DM searches in LHC with ML

Dr Rafał Masełek (LPSC (Grenoble))

25/10/2023 16:20

BSM

Dark Matter particles can be searched for in the Large Hadron Collider in the monojet channel defined as at least one hard jet recoiling against a missing momentum and no leptons. Monojet searches are challenging for classical analyses because they require investigation of subtle differences between the jets originating from the SM background and jets accompanying the production of DM...

23. Probing Lorentz invariance with top quarks at CMS

Nicolas Chanon (IP2I Lyon)

25/10/2023 16:42

BSM

17. Taking aim at the wino-higgsino plane with the LHC

Taylor Murphy (LPTHE (Sorbonne U./CNRS))

25/10/2023 17:04

BSM

In this work we explore multiple search strategies for higgsinos and mixed higgsino-wino states in the MSSM and project the results onto the $(\mu,M_2)$ plane. Assuming associated production of higgsino-like pairs with a $W/Z$ boson, we develop a search in a channel characterized by a hadronically tagged vector boson accompanied by missing energy. We use as our template an ATLAS search for...

22. Trend and novelty on tools used for BSM searches at LHC

Stephanie Beauceron (IPNL)

25/10/2023 17:26

BSM

1. Light dark matter with Breit-Wigner enhanced annihilation and possible probes

Sreemanti Chakraborti (IPPP Durham)

BSM

We study a minimal model for a light scalar dark matter (DM) with a mass of a few GeV, requiring a light dark photon mediator to interact with the Standard Model (SM) particles. We analyse the model by focusing on the Breit-Wigner resonance for DM annihilation channels, considering the thermal relic abundance condition that includes the early kinetic decoupling effect. The interactions of the...