# The Fifth Annual Large Hadron Collider Physics conference (LHCP2017)

May 15 – 20, 2017
Shanghai Jiao Tong University
Asia/Shanghai timezone
Please bring you passport details to the registration desk to confirm your participation for the excursions

## 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)

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

 LHCP_afb_hgammaz.pdf poster_afb_HZgamma_wanxia.pdf Probe CP violation in H→γZ through forward-backward asymmetry