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24–26 May 2021
University of Pittsburgh
US/Eastern timezone

Explaining gμ2 and RK() using the light mediators of U(1)T3R

25 May 2021, 15:30
15m

Speaker

Sumit Ghosh (Texas A&M University)

Description

Scenarios in which right-handed light Standard Model fermions couple to a new gauge group, U(1)T3R can naturally generate a sub-GeV dark matter candidate. But such models necessarily have large couplings to the Standard Model, generally yielding tight experimental constraints. We show that the contributions to gμ2 from the dark photon and dark Higgs largely cancel out in the narrow window where all the experimental constraints are satisfied, leaving a net correction which is consistent with recent measurements from Fermilab.These models inherently violate lepton universality, and UV completions of these models can include quark flavor violation which can explain RK() anomalies as observed at the LHCb experiment after satisfying the Bsμμ constraint in the allowed parameter space of the model. This scenario can be probed by FASER, SeaQuest, SHiP, LHCb, Belle etc.

Author

Sumit Ghosh (Texas A&M University)

Co-authors

Bhaskar Dutta (Texas A&M University) Peisi Huang (University fo Nebraska) Jason Kumar (University of Hawaii)

Presentation materials