Probe CP violation in H→ γZ through forward-backward asymmetry

2017/08/27 by Xia Wan, X. Wan, Wan, Xia
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.48550/arxiv.1708.08074

4pages, 3 figures, LHCP2017 proceedings

arxiv created 2017/08/27 · openalex publication_date 2017/08/27 · arxiv updated 2017/08/29 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28

Abstract

We suggest that the forward-backward asymmetry (A_FB) of the charged lepton in gg→ H→γZ→γℓ^-ℓ⁺ process could be used to probe the CP violating HγZ coupling when the interference from gg→γZ→γℓ^-ℓ⁺ process is included. With CP violation in HγZ coupling, the interference effect leads to a non-vanishing A_FB, which is also sensitive to the strong phase differences. The resonant and non-resonant strong phases together make A_FB(s) change sign around Higgs mass M_H. For phenomenology study, we suggest the integral over one-side mass region below M_H to magnify the A_FB strength.

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