Up-down asymmetries of charmed baryon three-body decays

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2019-11, Vol.79 (11), p.1-11, Article 946
• Main Authors: Cen, Jian-Yong, Geng, Chao-Qiang, Liu, Chia-Wei, Tsai, Tien-Hsueh
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Asymmetry; Baryons; Charm (particle physics); Data points; Decay; Elementary Particles; Flavor (particle physics); Hadrons; Heavy Ions; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Parameters; Parity; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular Article - Theoretical Physics; String Theory
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-019-7467-z

We study the up-down asymmetries in the three-body anti-triplet charmed baryon decays of B c → B n M M ′ with the S U ( 3 ) f flavor symmetry, where B c presents the anti-triplet charmed baryon of ( Ξ c 0 , - Ξ c + , Λ c + ) , while B n and M ( ′ ) denote octet baryon and meson states, respectively. By assuming the s-wave meson-pairs to be the dominant constituents in final state configurations, we can write the spin-dependent decay amplitude into parity-conserving and parity-violating parts, parametrized by 6 real parameters under S U ( 3 ) f , respectively. Fitting these parameters by 16 experimental data points with the minimum χ 2 method, we obtain that χ 2 / d . o . f = 2.4 . With the fitted parameters, we evaluate the up-down asymmetries along with the decay branching ratios of B c → B n M M ′ . Some of these up-down asymmetries are accessible to the experiments at BESIII, BELLE-II and LHCb.