Conveners
Theory and pheno II
- Jan Hajer (CFTP, IST, Universidade de Lisboa)
- Martin Hirsch
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Jose Miguel No (IFT-UAM/CSIC)03/06/2025, 09:30
In this talk, I will provide a (non-exhaustive) review of the connections between Long-Lived-Particles and both Baryogenesis and Dark Matter, touching upon Heavy Neutral Leptons and extended scalar sectors (from the baryogenesis side), and freeze-in and Conversion driven freeze-out mechanisms (from the dark matterside).
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Joshua Lockyer03/06/2025, 10:00
Hidden Valley (HV) scenarios featuring confining dark sectors can offer compelling collider signatures known as “dark-showers”. This confinement gives rise to dark mesons, some portions of which are expected to be long-lived particles (LLPs). We consider HV LLPs at lifetimes where it is necessary to reinterpret existing CMS searches targeting LLP decays in the muon system. Using a...
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Adrian Carmona Bermudez (Universidad de Granada (ES))03/06/2025, 10:20
I will present a minimal composite dark matter model, based on a $SU(N_d)$ dark sector with $n_f$ dark quarks and a heavy t-channel mediator. For $n_f \ge 4$, the dark flavor symmetry guarantees the stability of a subset of the dark pions, which serve as our dark matter candidates. Their relic abundance is determined by co-scattering or co-annihilation with the remaining dark pions, which are...
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Lucas Magno Dantas Ramos03/06/2025, 10:40
Conversion-driven freeze-out is an appealing mechanism to explain the observed relic density while naturally accommodating the null results from direct and indirect detection due to a very weak dark matter coupling. Interestingly, the scenario predicts long-lived particles decaying into dark matter with lifetimes favorably coinciding with the range that can be resolved at the LHC. However, the...
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