关于Ds介子非标准轻子衰变的证据不断积累。
Accumulating evidence for nonstandard leptonic decays of Ds mesons.
作者信息
Dobrescu Bogdan A, Kronfeld Andreas S
机构信息
Theoretical Physics Department, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500, USA.
出版信息
Phys Rev Lett. 2008 Jun 20;100(24):241802. doi: 10.1103/PhysRevLett.100.241802. Epub 2008 Jun 17.
Abstract
The measured rate for D{s}{+}-->l+nu decays, where l is a muon or tau, is larger than the standard model prediction, which relies on lattice QCD, at the 3.8sigma level. We discuss how robust the theoretical prediction is, and we show that the discrepancy with experiment may be explained by a charged Higgs boson or a leptoquark.
摘要
测量得到的(D_{s}^{+}\to l^{+}\nu)衰变率（其中(l)为缪子或陶子）比依赖格点量子色动力学的标准模型预测值在(3.8)倍标准差水平上要大。我们讨论了理论预测的稳健程度，并表明与实验的差异可能由带电希格斯玻色子或轻夸克来解释。
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