论文标题
计算$τ\至π（k）ν[γ] $的一环辐射校正并测试新物理
Computing one-loop radiative corrections in $τ\to π(K) ν[γ]$ and testing new physics
论文作者
论文摘要
Without a doubt the ratios $R_{τ/ P}\equiv Γ\left( τ\to P ν_τ[γ] \right) / Γ\left(P\to μν_μ[γ]\right)$ ($P=π,K$) give a convenient scenario to test the lepton universality, the CKM unitarity and to search for non-standard interactions in $τ$腐烂。此外，以前对这些可观察物的理论估计已有25年以上的历史，并且对该估计的一些假设是不现实的。因此，$ r_ {τ/ p} $的更新是及时的。一环辐射校正是通过考虑手性扰动理论的扩展来计算得出的，包括最轻的旋转一个共振和尊重QCD决定的短途行为。我们已经报道了$ΔR_{τ/π} =（0.18 \ pm 0.57）\％$和$ΔR_{τ/k} =（0.97 \ pm 0.58）\％$，在基本上通过估计反对者的估计而导致了不确定性。我们已经测试了Lepton的普遍性，CKM Unitarity，并以$τ$衰减搜索了新物理。作为副产品，我们还确定了对$τ\ $τ\ topν_τ[γ] $衰减率的理论辐射校正，$δ_{τπ} = - （0.24 \ pm 0.56）\％$和$δ__和$δ__{°{°{τk} = - （0.15 \ pm 0.57）
Without a doubt the ratios $R_{τ/ P}\equiv Γ\left( τ\to P ν_τ[γ] \right) / Γ\left(P\to μν_μ[γ]\right)$ ($P=π,K$) give a convenient scenario to test the lepton universality, the CKM unitarity and to search for non-standard interactions in $τ$ decays. Moreover, the previous theoretical estimation of these observables is more than twenty-five years old and some assumptions of that estimation are unrealistic. Therefore, an update of $R_{τ/ P}$ was timely. The one-loop radiative corrections have been computed by considering an expansion of Chiral Perturbation Theory including the lightest spin-one resonances and respecting the short-distance behavior dictated by QCD. We have reported $δR_{τ/π}=(0.18\pm 0.57 )\%$ and $δR_{τ/K}=(0.97\pm 0.58 )\%$, where the uncertainties have been induced fundamentally by the estimation of the counterterms. We have tested the lepton universality, the CKM unitarity and have searched for new physics in $τ$ decays. As a by-product, we have also determined the theoretical radiative corrections to the $τ\to P ν_τ[γ]$ decay rates, $δ_{τπ} = -(0.24 \pm 0.56) \%$ and $δ_{τK} = -(0.15 \pm 0.57) \%$
