Productions of X(3872), $$Z_c(3900)$$, $$X_2(4013)$$, and $$Z_c(4020)$$ in $$B_{(s)}$$ decays offer strong clues on their molecular nature

Author:

Wu Qi,Liu Ming-ZhuORCID,Geng Li-Sheng

Abstract

AbstractThe exotic states X(3872) and $$Z_c(3900)$$ Z c ( 3900 ) have long been conjectured as isoscalar and isovector $${\bar{D}}^*D$$ D ¯ D molecules. In this work, we first propose the triangle diagram mechanism to investigate their productions in B decays as well as their heavy quark spin symmetry partners, $$X_2(4013)$$ X 2 ( 4013 ) and $$Z_c(4020)$$ Z c ( 4020 ) . We show that the large isospin breaking of the ratio $${\mathcal {B}}[B^+ \rightarrow X(3872) K^+]/{\mathcal {B}}[B^0 \rightarrow X(3872) K^0] $$ B [ B + X ( 3872 ) K + ] / B [ B 0 X ( 3872 ) K 0 ] can be attributed to the isospin breaking of the neutral and charged $${\bar{D}}^*D$$ D ¯ D components in their wave functions. For the same reason, the branching fractions of $$Z_c(3900)$$ Z c ( 3900 ) in B decays are smaller than the corresponding ones of X(3872) by at least one order of magnitude, which naturally explains its non-observation. A hierarchy for the production fractions of X(3872), $$Z_c(3900)$$ Z c ( 3900 ) , $$X_2(4013)$$ X 2 ( 4013 ) , and $$Z_c(4020)$$ Z c ( 4020 ) in B decays, consistent with all existing data, is predicted. Furthermore, with the factorization ansatz we extract the decay constants of X(3872), $$Z_c(3900)$$ Z c ( 3900 ) , and $$Z_c(4020)$$ Z c ( 4020 ) as $${\bar{D}}^*D^{(*)}$$ D ¯ D ( ) molecules via the B decays, and then calculate their branching fractions in the relevant $$B_{(s)}$$ B ( s ) decays, which turn out to agree with all existing experimental data. The mechanism we proposed is useful to elucidate the internal structure of the many exotic hadrons discovered so far and to extract the decay constants of hadronic molecules, which can be used to predict their production in related processes.

Publisher

Springer Science and Business Media LLC

Reference90 articles.

1. S.K. Choi et al. [Belle], Phys. Rev. Lett. 91, 262001 (2003). arXiv:hep-ex/0309032

2. B. Aubert et al. [BaBar], Phys. Rev. Lett. 93, 041801 (2004). arXiv:hep-ex/0402025

3. D. Acosta et al. [CDF], Phys. Rev. Lett. 93, 072001 (2004). arXiv:hep-ex/0312021

4. V.M. Abazov et al. [D0], Phys. Rev. Lett. 93, 162002 (2004). arXiv:hep-ex/0405004

5. S. Chatrchyan et al. [CMS], JHEP 04, 154 (2013). arXiv:1302.3968

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3