May 15 – 20, 2017
Shanghai Jiao Tong University
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Probe CP violation through forward-backward asymmetry in $h\to \gamma Z \to \gamma l^-l^+ $ process

May 16, 2017, 2:00 PM
2h
Haoran 102 (Shanghai Jiao Tong University)

Haoran 102

Shanghai Jiao Tong University

Xuhui Campus

Speaker

Dr xia wan (School of Physics $\&$ Information Technology, Shaanxi Normal University, Xi'an 710119, China)

Description

We show that the forward-backward asymmetry $(A_{FB})$ of the charged lepton in $gg\to H\to\gamma Z\to\gamma \ell^-\ell^+$ process could be used to probe the CP violating $H\gamma Z$ coupling when the interference of $gg\to\gamma Z\to\gamma \ell^-\ell^+$ process is included. In the presence of CP violation in $H\gamma Z$ coupling, the interference has a non-vanishing forward-backward asymmetry $(A_{FB})$, which is also sensitive to the strong phase differences. The resonant and non-resonant strong phases together make $A_{FB}$ change sign around Higgs mass $M_H$. We propose the integral over one-side mass region below (or above) $M_H$ to get a larger $A_{FB}$.

Primary authors

Dr xuan chen (Institute of Theoretical Physics $\&$ State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China) Dr gang li (Institute of Theoretical Physics $\&$ State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China ) Dr xia wan (School of Physics $\&$ Information Technology, Shaanxi Normal University, Xi'an 710119, China)

Presentation materials