17–21 Oct 2022
CERN
Europe/Zurich timezone

A Novel Approach to Detect Lepton Flavor Violating Scalar

Not scheduled
25m
500/1-001 - Main Auditorium (CERN)

500/1-001 - Main Auditorium

CERN

400
Show room on map

Speaker

Kunfeng Lyu (University of Minnesota)

Description

We propose using two existing neutrino experiment and one future experiment to probe a simple charged lepton flavor violation (CFLV) model. It is assumed that a complex scalar couples to $(e,\mu)$ or $(\mu,\tau)$ and we focus the case that the scalar mass is within $[|m_{l_1} - m_{l_2}|, m_{l_1} + m_{l_2}]$ in which $l_1$ and $l_2$ are the two different charged leptons. First the muon magnetic moment can give the allowed parametric space in the coupling-mass parameter plane. For $\mu-e$ sector, we exploit the muonium decay branching ratio and LSND which can exclude the parametric region explained by $g_\mu -2$. For the $\tau-\mu$ sector, there are 3 ways to produce the scalar at beamdump experiments, the Drell-Yan process, the heavy meson decay and muon of target. We explore the constraints from the CHARM, NuTeV and the future beamdump experiment SHiP. It turns out CHARM and NuTeV cannot exclude the parameter region that explains the muon g − 2 anomaly, while the future SHiP experiment covers the whole parameter space.

Participation I prefer to give a remote talk

Authors

Kunfeng Lyu (University of Minnesota) Maxim Pospelov Yohei Ema Zhen Liu

Presentation materials