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arXiv 0907.2461hep-ph
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右旋荷电电流对|V_ub|和|V_cb|测定的影响

Effects of right-handed charged currents on the determinations of |V_ub| and |V_cb|

Andreas Crivellin

摘要:

我们研究了夸克与W玻色子的右手耦合对|V_ub|和|V_cb|测量的影响。结果表明,这种耦合可以消除由B \to π \ell v,B^+ \to τ^+ v和B \to X_u \ell v测定|V_ub|之间的差异。此外,从B \to D^* \ell ν、B \to D \ell ν和包含B \to X_c \ell ν的衰变中对|V_cb|的测量可以更好地一致。我们证明,右手耦合可以产生内的MSSM由有限的胶子夸克环。这种效应涉及到夸克质量矩阵的参数δ^{u RL}_{23}和δ^{u RL}_{13},它们对其它过程的约束很差。另一方面,所有的引力夸克修正规则左手耦合的W玻色子被发现是太小,是相关的。

英文摘要:

We study the effect of a right-handed coupling of quarks to the W-boson on the measurements of |V_ub| and |V_cb|. It is shown that such a coupling can remove the discrepancies between the determinations of |V_ub| from B\toπ\ellν, B^+\toτ^+ νand B\to X_u\ellν. Further the measurements of |V_cb| from B\to D^*\ellν, B\to D\ellνand inclusive B\to X_c\ellνdecays can be brought into better agreement. We demonstrate that a right-handed coupling can be generated within the MSSM by a finite gluino-squark loop. The effect involves the parameters δ^{u RL}_{23} and δ^{u RL}_{13} of the squark mass matrices, which are poorly constrained from other processes. On the other hand, all gluino-squark corrections to the regular left-handed coupling of the W-boson are found to be too small to be relevant.

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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