Nonleptonic three-body charmed baryon weak decays with H(15)

被引：6

作者：

Geng, Chao-Qiang ^{[1
]}

Liu, Chia -Wei ^{[2
,3
,4
]}

Liu, Sheng-Lin ^{[1
,5
,6
]}

机构：

[1] UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China

[2] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China

[3] Shanghai Jiao Tong Univ, Key Lab Particle Astrophys & Cosmol MOE, Shanghai 200240, Peoples R China

[4] Shanghai Jiao Tong Univ, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China

[5] UCAS, Inst Theoret Phys, Beijing 100190, Peoples R China

[6] Univ Chinese Acad Sci, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 09期

基金：

中国国家自然科学基金;

关键词：

CABIBBO-SUPPRESSED DECAYS; LAMBDA(+)(C); QUARK; ASYMMETRIES;

D O I：

10.1103/PhysRevD.109.093002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the nonleptonic three-body charmed baryon weak decays of Bc - BnPP' under the SU(3)F flavor symmetry, where Bc denotes the antitriplet charmed baryon, comprising (e0c, -e+c , A+c ), and Bn and P(P') represent octet baryon and pseudoscalar meson states, respectively. In addition to 12 parameters from the contributions of the color-antisymmetric part of the effective Hamiltonian, denoted as H(6<overline>), there are 4 parameters from the color-symmetric one, H(15), which were not included in the previous study. With 16 parameters in total and 28 experimental data points, we obtain the minimal chi 2 over degree of freedom of chi 2/d.o.f = 1.5, which is a great improvement comparing to that without H(15). With the better fitting values, we evaluate the branching ratios and up-down asymmetries of Bc - BnPP', which present some interesting results such as B(A+c - (e(1690)0 - E+K-)K+) - (1.5 +/- 0.4) x 10-3 and potential SU(3) breaking effects in e+c - p pi+K- and A+c - E+pi-K+ to be verified by the experiments at BESIII, Belle-II, and LHCb.

引用

页数：14

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