W-exchange contribution to the decays Ξcc++ → Ξc+(')π+ using light-cone sum rules

被引：10

作者：

Shi, Yu-Ji ^{[1
,2
]}

Zhao, Zhen-Xing ^{[3
]}

Xing, Ye ^{[4
]}

Meissner, Ulf-G ^{[1
,2
,5
,6
,7
]}

机构：

[1] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[2] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

[3] Inner Mongolia Univ, Sch Phys Sci & Technol, Hohhot 010021, Peoples R China

[4] China Univ Min & Technol, Sch Phys, Xuzhou 221000, Jiangsu, Peoples R China

[5] Forschungszentrum Julich, Inst Adv Simulat, Inst Kernphys, D-52425 Julich, Germany

[6] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany

[7] Tbilisi State Univ, GE-0186 Tbilisi, Georgia

来源：

PHYSICAL REVIEW D | 2022年 / 106卷 / 03期

基金：

中国国家自然科学基金;

关键词：

WEAK DECAYS; HEAVY; BARYONS;

D O I：

10.1103/PhysRevD.106.034004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the W-exchange contribution to the Xi(++)(cc)-> Xi(+)((')())(c)pi(+) decay using light-cone sum rules. The two-particle light-cone distribution amplitudes of the pion are used as nonperturbative input for the sum rules calculation, and the perturbative kernel is calculated at the leading order. We obtain the corresponding decay branching fractions by combining our W-exchange amplitudes with the factorizable amplitudes given by various theoretical methods from the literature. It is shown that with the factorizable amplitudes from heavy quark effective theory, we obtain the branching fraction ratio B(Xi(++)(cc) -> Xi c(+')pi(+))/B(Xi(++)(cc) -> Xi(+)(c)pi(+)) = 1.42 +/- 0.78, which is consistent with the experimental value of 1.41 +/- 0.17 +/- 0.1.

引用

页数：13

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