Invisible and semi-invisible decays of bottom baryons  

作　　者：Yong Zheng Jian-Nan Ding Dong-Hao Li Lei-Yi Li Cai-Dian Lü Fu-Sheng Yu 郑勇;丁剑南;李东浩;李磊毅;吕才典;于福升

机构地区：[1]MOE Frontiers Science Center for Rare Isotopes,Lanzhou University,Lanzhou 730000,China [2]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China [3]Center for High Energy Physics,Peking University,Beijing 100871,China [4]Institute of High Energy Physics,CAS,Beijing 100049,China [5]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 101408,China

出　　处：《Chinese Physics C》2024年第8期127-139,共13页中国物理C（英文版）

基　　金：Supported by the National Key Research and Development Program of China(2020YFA0406400,2023YFA1606000);the National Natural ScienceFoundationof China(12335003,12275277)。

摘　　要：The similar densities of dark matter and baryons in the universe imply that they may arise from the same ultraviolet model.B-Mesogenesis,which assumes dark matter is charged under the baryon number,attempts to simultaneously explain the origin of baryon asymmetry and dark matter in the universe.In particular,B-Mesogenesis may induce bottom-baryon decays into invisible or semi-invisible final states,which provide a distinctive signal for probing this scenario.In this work,we systematically study the invisible decays of bottom baryons into dark matter and the semi-invisible decays of bottom baryons into a meson or a photon together with a dark matter particle.In particular,the fully invisible decay can reveal the stable particles in B-Mesogenesis.Some QCD-based frameworks are used to calculate the hadronic matrix elements under the B-Mesogenesis model.We estimate the constraints on the Wilson coefficients or the product of some new physics couplings with the Wilson coefficients according to the semi-invisible and invisible decays of bottom baryons detectable at future colliders.

关 键 词：baryon asymmetry dark matter B-Mesogenesis invisible and semi-invisible decay bottom baryons 

分 类 号：O572.34[理学—粒子物理与原子核物理]