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| Description | Title: Probing Fundamental Theories & Reheating Cosmology with Cosmic Millicharge Background Abstract: Exploring millicharged particles (particles with small rational or irrational charges) has become a central focus in contemporary particle physics and cosmology. Linked to charge quantization, which spurred Dirac Quantization and Grand Unification Theories, the millicharge searches are also a testing grounds for string theory and quantum gravity. I will give a general introduction to millicharged particles and present a novel approach to leverage them for probing reheating cosmology—a pivotal phase post-inflation, shaping the current Universe's particle composition. Millicharge searches offer insights into reheating scenarios and temperatures. I will also discuss the irreducible cosmic millicharged background and implications on the dark matter observations, the 21-cm absorption spectrums, Big Bang nucleosynthesis, and CMB measurements. Finally, the talk delves into dedicated experimental efforts, notably the FORMOSA experiment at CERN, LANSCE-mQ at LANL, and neutrino experiments at Fermilab, which may help unveil the mysteries in cosmology and fundamental theories. Speaker: Yu-Dai Tsai (LANL) Host: Matthew Citron |
| Location | PHY 285 |
| Date | Tue, October 8, 2024 |
| Time | 4:00pm-6:00pm PDT |
| Duration | 2 hours |
| Access | Public |
| Created by | High-Energy Seminars |
| Updated | Wed, October 2, 2024 1:36pm PDT |
| Send Reminder | Yes - 20241002 |
