%0 Journal Article %1 Zhang2009Leptonic %A Zhang, Yu-Jie %A Shao, Hua-Sheng %D 2009 %K bsm, heavy %T Leptonic Decay of Upsilon, a Possible Evidence of New Physics %U http://arxiv.org/abs/0911.1766 %X We calculated the quasi exclusive leptonic decay width of Upsilon to NLO in QED. The large logarithms are resummed too. Then we get R\_tau mu=GammaUpsilon ->tau+tau-/GammaUpsilon -> mu+mu- at the precision level of 0.1\% within Standard Model. Compared with the Babar's data R\_tau mu=1.009+-0.01+-0.024, we find that Standard Model prediction is not consistent with the experiment date in the error bar. The discrepancy is about 2\% or more. So leptonic decay of Upsilon may be a possible evidence of New Physics. We also consider the impact of R\_tau mu from light Higgs h and pseudoscalar Higgs A0 within New Physics Model.

@article{Zhang2009Leptonic, abstract = {We calculated the quasi exclusive leptonic decay width of Upsilon to NLO in QED. The large logarithms are resummed too. Then we get R\_{tau mu}=Gamma[Upsilon -\>tau+tau-]/Gamma[Upsilon -\> mu+mu-] at the precision level of 0.1\% within Standard Model. Compared with the Babar's data R\_{tau mu}=1.009+-0.01+-0.024, we find that Standard Model prediction is not consistent with the experiment date in the error bar. The discrepancy is about 2\% or more. So leptonic decay of Upsilon may be a possible evidence of New Physics. We also consider the impact of R\_{tau mu} from light Higgs h and pseudoscalar Higgs A0 within New Physics Model.}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Zhang, Yu-Jie and Shao, Hua-Sheng}, biburl = {https://www.bibsonomy.org/bibtex/28e3e24de9c6292526ae0338d70e8b182/cmcneile}, citeulike-article-id = {6097095}, citeulike-linkout-0 = {http://arxiv.org/abs/0911.1766}, citeulike-linkout-1 = {http://arxiv.org/pdf/0911.1766}, day = 9, eprint = {0911.1766}, interhash = {3b9a21248485d7d7046aba0ee3009b9d}, intrahash = {8e3e24de9c6292526ae0338d70e8b182}, keywords = {bsm, heavy}, month = nov, posted-at = {2009-11-11 08:26:14}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{Leptonic Decay of Upsilon, a Possible Evidence of New Physics}}, url = {http://arxiv.org/abs/0911.1766}, year = 2009 }