Low-energy $U(1)_{B-L}$ model at the high-intensity frontier

by Prof. Yongchao Zhang (Southeast University)

Tuesday 1 Jun 2021, 10:00 → 11:00 Asia/Shanghai

Tsung-Dao Lee library/Fourth Floor-410 - 410# Meeting Room (Tsung-Dao Lee Library)

Abstract:

The low-energy $U(1)_{B−L}$ model is a well-motivated framework to account for the tiny neutrino masses. The light scalar ($S$) and gauge ($Z'$) bosons in this model can be searched for in some high-intensity experiments. At the DUNE experiment, the gauge coupling of $S$ to $Z'$ could improve significantly the $Z'$ prospects, even by one order of magnitude. The $Z'$ boson can also induce important interference effect for $\nu - e$ scattering at DUNE and JSNS$^2$. Through mixing with the SM $Z$ boson, the light $Z'$ boson contributes to the high-precision P2 experiment, which is designed to measure the weak mixing angle in $e+p$ or $e + ^{12}$C scattering. If sufficiently light, the light $S$ can also be produced abundantly in supernova cores, merging neutron stars, the Sun, red giants, white dwarfs and horizontal-branch stars, and the corresponding astrophysical observations could provide some constraints on the couplings $S$.

Biography:

Dr. Yongchao Zhang, Associate Professor at Southeast University, got his Ph.D. from Peking University in 2014. He was once a visiting scholar at University of Maryland and Institute of Theoretical Physics, Chinese Academy of Sciences, and a postdoctor at Université Libre de Bruxelles and Washington University in St. Louis. He is mainly interested in beyond standard model phenomenology and relevant astrophysics and cosmology, such as neutrino physics, axion physics, and the interplay of particle physics and supernovae and neutron stars.

Zoom link：  https://zoom.com.cn/j/93579891950

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B-L_SJTU.pdf