Eur. Phys. J. C (2023) 83: 744
https://doi.org/10.1140/epjc/s10052-023-11930-z

Regular Article - Theoretical Physics

Semi-inclusive decays of B meson into a dark anti-baryon and baryons

¹ School of Physics, East China University of Science and Technology, 200237, Shanghai, China
² School of Materials Science and Physics, China University of Mining and Technology, 221116, Xuzhou, China
³ Tsung-Dao Lee Institute, Shanghai Jiao Tong University, 200240, Shanghai, China
⁴ Shanghai Key Laboratory of Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, 200240, Shanghai, China
⁵ Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, 210023, Nanjing, Jiangsu, China

^a shiyuji@ecust.edu.cn

Received: 5 June 2023
Accepted: 15 August 2023
Published online: 22 August 2023

Abstract

Using the recently developed B-Mesogenesis scenario, we studied the semi-inclusive decays of B meson into a dark anti-baryon $\psi$ plus any possible states X containing u/c and d/s quarks with unit baryon number. The two types of effective Lagrangians proposed by the scenario are both considered in the study. The semi-inclusive decay branching fractions of $B\to X\psi$ are calculated by the method of heavy quark expansion, where the non-perturbative contributions from the matrix elements of dimension-5 operators are included. We obtained the branching fractions as functions of the dark anti-baryon mass. Using the experimental upper limits of the branching fractions, we presented the constraints of the coupling constants in the B-Mesogenesis scenario.