6–11 Jun 2021
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America/Toronto timezone
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(G*) Sub-GeV Dark Vector Bosons and their Impacts on Cosmology

7 Jun 2021, 17:06
3m
Underline Conference System

Underline Conference System

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle) Theoretical Physics / Physique théorique (DTP-DPT) M4-4 Cosmology (DTP) / Cosmologie (DPT)

Speaker

John Coffey (University of Victoria)

Description

The purpose of this presentation is to recognize the effects of electromagnetic energy injection into the early Universe from decaying sub-GeV dark vectors. Decay widths and energy spectra for the most prominent channels in the sub-GeV region are calculated for various dark vector models. The models include the kinetic mixing of the dark photon with the Standard Model photon, $U(1)_{A'}$ , a dark vector boson which couples to the baryon minus the lepton current, $U(1)_{B-L}$, and the last three are dark vector bosons which couple one lepton's current minus a different lepton's current, $U(1)_{L_i - L_j}$ where $i , j = e, \mu, \tau$ . Measurements from Big Bang Nucleosynthesis and the Cosmic Microwave Background are used to constrain the lifetime, mass and coupling constant of the dark vectors.

Primary author

John Coffey (University of Victoria)

Presentation materials

There are no materials yet.