Author:
Geng 耿 Chao-Qiang 朝强,Liu 劉 Chia-Wei 佳韋,Zhang 张 Jiabao 嘉宝
Abstract
Abstract
We explored a new approach to search for a low-mass
particle through
decays by identifying its existence through parity-violating phenomena in the isospin-violating final states of
and the corresponding charge conjugated states of
. Our investigation centered on a generation-independent and leptophobic
with mass below 10 GeV. Given the present experimental conditions at Beijing Spectrometer III (BESIII) and the anticipated opportunities at the Super Tau Charm Factory (STCF), we conducted Monte-Carlo simulations to predict possible events at both facilities. Notably, we foresee a substantial enhancement in the precision of the lower limit estimation of
as well as a reduction in statistical uncertainty with upcoming STCF experiments. Furthermore, it is essential to highlight that a null result in the measurement of
would impose stringent constraints, requiring the
couplings to be in the order of
.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China