Semileptonic decays of doubly charmed baryons with Ξc - Ξ'c mixing

被引：9

作者：

Geng, Chao-Qiang ^{[1
,2
]}

Jin, Xiang-Nan ^{[1
,2
]}

Liu, Chia-Wei ^{[1
,2
]}

Yu, Xiao ^{[1
,2
]}

Zhou, Ao-Wen ^{[1
,2
]}

机构：

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

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

来源：

PHYSICS LETTERS B | 2023年 / 839卷

基金：

中国国家自然科学基金;

关键词：

WEAK DECAYS; HEAVY BARYONS;

D O I：

10.1016/j.physletb.2023.137831

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the Xi(c) - Xi(')(c) mixing effects in the semileptonic decays the doubly charm baryons of Xi(cc). We focus on the ratio of R(theta C) equivalent to B Xi(cC) -> Xi(c)e(+)nu(e))/B (Xi(cc) -> Xi(c)e(+)nu(e)) and find that (R(theta(O)), R(-theta(O))) = (0.46 +/- 0.01, 7.33 +/- 0.23) with theta(0) = 0.137 pi, which are in sharp contrast to R(0) = 2.15 +/- 0.11 without the mixing. The ratio is enhanced (suppressed) by a factor of four for a negative (positive) theta c. In addition, the polarization asymmetries of Xi(('))(c) are found to be alpha(-theta(0)) = 0.32 (-0.76) and alpha(theta(0)) = -0.82 (-0.38). As R and alpha are highly sensitive to theta(c) and unaffected by the W-exchange contributions, they provide excellent opportunities to determine theta(c) in the ongoing experiments. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.

引用

页数：2

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