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arXiv 2103.15964hep-phhep-exhep-latnucl-exnucl-th
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重+轻赝标介子半轻子跃迁

Heavy+light pseudoscalar meson semileptonic transitions

Zhen-Ni Xu, Zhu-Fang Cui, Craig D. Roberts, Chang Xu

摘要:

一个保序正则化的矢量$\times$矢量接触相互作用(SCI)是用来提供一个统一的治疗涉及$π$,$K$,$D_{(s)}$,$B_{(s,c)}$初始状态的半轻子跃迁。该框架的特点是代数简单,参数少,并能够同时处理系统从南武-戈德斯通模式重+重介子。尽管SCI形状因子通常有些僵硬,但结果与实验和严格的理论结果相当。因此,对五个未测量的$B_{s,c}$分支分数的预测应该是一个合理的指导。分析提供了深入了解希格斯玻色子耦合通过电流夸克质量的过渡形状因子的影响,和$B_{(s)}\to D_{(s)}$过渡的结果产生了预测的Isgur明智的功能与当代数据公平协议。

英文摘要:

A symmetry-preserving regularisation of a vector$\times$vector contact interaction (SCI) is used to deliver a unified treatment of semileptonic transitions involving $π$, $K$, $D_{(s)}$, $B_{(s,c)}$ initial states. The framework is characterised by algebraic simplicity, few parameters, and the ability to simultaneously treat systems from Nambu-Goldstone modes to heavy+heavy mesons. Although the SCI form factors are typically somewhat stiff, the results are comparable with experiment and rigorous theory results. Hence, predictions for the five unmeasured $B_{s,c}$ branching fractions should be a reasonable guide. The analysis provides insights into the effects of Higgs boson couplings via current-quark masses on the transition form factors; and results on $B_{(s)}\to D_{(s)}$ transitions yield a prediction for the Isgur-Wise function in fair agreement with contemporary data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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