no code implementations • 24 Feb 2021 • Zhen-Hua Zhang
A novel observable measuring the $C\! P$ asymmetry in multi-body decays of heavy mesons, which is called the forward-backward asymmetry induced $C\! P$ asymmetry (FBI-$C\! P$A), $A_{CP}^{FB}$, is introduced.
High Energy Physics - Phenomenology High Energy Physics - Experiment
no code implementations • 4 Feb 2021 • Jing-Juan Qi, Zhen-Yang Wang, Chao Wang, Zhen-Hua Zhang, Xin-Heng Guo
In the framework of the QCD factorization approach, we study the localized $CP$ violations of the $B^-\rightarrow K^- \pi^+\pi^-$ decay with and without $a_0^0(980)-f_0(980)$ mixing mechanism, respectively, and find that the localized $CP$ violation can be enhanced by this mixing effect when the mass of the $\pi^+\pi^-$ pair is in the vicinity of the $f_0(980)$ resonance.
High Energy Physics - Phenomenology
no code implementations • 15 Dec 2020 • Zhen-Hua Zhang, Feng-Kun Guo
We propose a new object, the $X$ atom, which is the $D^\pm D^{*\mp}$ composite system with positive charge parity and a mass of $(3879. 89\pm0. 07)$ MeV, formed mainly due to the Coulomb force.
High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment Nuclear Theory