Semileptonic decays Λc+ → Λl+νl(l = e,μ) in the covariant quark model and comparison with the new absolute branching fraction measurements of Belle and BESIII

被引：40

作者：

Gutsche, Thomas ^{[1
]}

Ivanov, Mikhail A. ^{[2
]}

Koerner, Juergen G. ^{[3
]}

Lyubovitskij, Valery E. ^{[1
,4
,5
]}

Santorelli, Pietro ^{[6
,7
]}

机构：

[1] Univ Tubingen, Inst Theoret Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany

[2] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia

[3] Johannes Gutenberg Univ Mainz, Inst Phys, PRISMA Cluster Excellence, D-55099 Mainz, Germany

[4] Tomsk State Univ, Dept Phys, Tomsk 634050, Russia

[5] Tomsk Polytech Univ, Math Phys Dept, Lenin Ave 30, Tomsk 634050, Russia

[6] Univ Naples Federico II, Dipartimento Fis, Complesso Univ Monte St Angelo,Via Cintia, I-80126 Naples, Italy

[7] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 03期

关键词：

BARYON TRANSITIONS; MESON DECAYS; FORM-FACTORS; HEAVY;

D O I：

10.1103/PhysRevD.93.034008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present precise theoretical predictions for the absolute branching fractions of Lambda(+)(c) -> Lambda l(+)nu(l) (l = e,mu)decays in the covariant confined quark model. This study is motivated by two recent and accurate measurements of the absolute branching fractions of Lambda(+)(c) -> pK(-)pi(+) and Lambda(+)(c) -> Lambda e(+) nu(e) by the Belle Collaboration at the KEKB and by the BESIII Collaboration at the BEPCII. Our predictions for the branching fractions are consistent with both experimental results. We also provide detailed numerical results for differential decay distributions and polarization observables.

引用

页数：8

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