Light-cone distribution amplitudes of Ξ and their applications

被引：25

作者：

Liu, Yong-Lu ^{[1
]}

Huang, Ming-Qiu ^{[1
]}

机构：

[1] Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China

来源：

PHYSICAL REVIEW D | 2009年 / 80卷 / 05期

关键词：

TWIST DISTRIBUTION AMPLITUDES; ELECTROMAGNETIC FORM-FACTORS; EXCLUSIVE PROCESSES; QUANTUM CHROMODYNAMICS; EVOLUTION-EQUATIONS; RESONANCE PHYSICS; WAVE-FUNCTIONS; BARYON DECAYS; VECTOR-MESONS; SUM-RULES;

D O I：

10.1103/PhysRevD.80.055015

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the light-cone distribution amplitudes of the Xi baryons up to twist six on the basis of QCD conformal partial wave expansion to the leading order conformal spin accuracy. The nonperturbative parameters relevant to the DAs are determined in the framework of the QCD sum rule. The light-cone QCD sum rule approach is used to investigate both the electromagnetic form factors of Xi and the exclusive semileptonic decay of Xi(c) as applications. Our estimations on the magnetic moments are mu(Xi 0) = -(1.92 +/- 0.34)mu(N) and mu(Xi)- = (1.19 +/- 0.03)mu(N). The decay width of the process Xi(c) -> Xi e(+) nu(e) is evaluated to be Gamma = 8.73 x 10(-14) GeV, which is in accordance with the experimental measurements and other theoretical approaches.

引用

页数：15

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