arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1809.01161hep-ph
收藏

作为新物理学探测器的强子τ衰变在LHC时代

Hadronic tau decays as New Physics probes in the LHC era

Vincenzo Cirigliano, Adam Falkowski, Martín González-Alonso, Antonio Rodríguez-Sánchez

摘要:

在标准模型有效场论(SMEFT)的模型独立框架内,我们分析了强子τ衰变对非标准相互作用的敏感性。利用最新的格点数据和QCD色散关系研究了排斥和包容衰变。我们发现,有足够的理论上干净的通道解开所有的有效耦合,这些衰变,与$τ\to ππν_τ$通道代表一个意想不到的强大的新物理探测。我们发现,非标准耦合的费米常数的比率是绑定在次百分之水平。这些界限是互补的电弱精密观测和$p p \to τν_τ$测量在大型强子对撞机。τ衰变和LHC数据的结合对规范玻色子-轻子顶点修正中的轻子普适性破坏提出了更严格的约束。

英文摘要:

We analyze the sensitivity of hadronic tau decays to non-standard interactions within the model-independent framework of the Standard Model Effective Field Theory (SMEFT). Both exclusive and inclusive decays are studied, using the latest lattice data and QCD dispersion relations. We show that there are enough theoretically clean channels to disentangle all the effective couplings contributing to these decays, with the $τ\to ππν_τ$ channel representing an unexpected powerful New Physics probe. We find that the ratios of non-standard couplings to the Fermi constant are bound at the sub-percent level. These bounds are complementary to the ones from electroweak precision observables and $p p \to τν_τ$ measurements at the LHC. The combination of tau decay and LHC data puts tighter constraints on lepton universality violation in the gauge boson-lepton vertex corrections.

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。

↑