Hadronic weak decays of Λc in the quark model

被引：20

作者：

Niu, Peng-Yu ^{[1
,2
,3
]}

Richard, Jean-Marc ^{[4
]}

Wang, Qian ^{[1
,2
,5
]}

Zhao, Qiang ^{[1
,2
,3
,6
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Univ Lyon, Inst Phys Infinis Lyon 2, UCBL IN2P3 CNRS, 4 Rue Enrico Fermi, F-69622 Villeurbanne, France

[5] South China Normal Univ, Inst Quantum Matter, Guangdong Prov Key Lab Nucl Sci, Guangzhou 510006, Peoples R China

[6] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat S, Changsha 410081, Peoples R China

来源：

PHYSICAL REVIEW D | 2020年 / 102卷 / 07期

基金：

中国国家自然科学基金;

关键词：

BARYONS;

D O I：

10.1103/PhysRevD.102.073005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The hadronic weak decays of Lambda(c) are studied in the framework of a constituent quark model. With the combined analysis of the Cabbibo-favored processes, Lambda(c) -> Lambda pi(+), Sigma(0)pi(+), and Sigma(+)pi(0), we confirm that the nonfactorizable transition mechanisms play a crucial role in the understanding of their compatible branching ratios. We emphasize that the SU(3) flavor symmetry breaking effects, which is generally at the order of 1-2%, can be amplified by the destructive interferences among the pole terms in the diagrams with internal conversion. Some contributions are sensitive to the spatial distribution of the scalar-isoscalar light-quark sector in the Lambda(c), and its overlap with the light quarks in the final state hyperon. Namely, a compact diquark configuration is disfavored.

引用

页数：19

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