Measurement of the Lepton Forward-Backward Asymmetry in B → Xs l+ l- Decays with a Sum of Exclusive Modes
Measurement of the Lepton Forward-Backward Asymmetry in B → Xs l+ l- Decays with a Sum of Exclusive Modes
复制标题
B → Xs l+ l- 中轻子前向-后向不对称性的测量与独占模式之和
DOI:
10.1103/physrevd.93.032008
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发表时间:
2016
影响因子:
5
通讯作者:
Y. Sato et al (Belle Collaboration)
中科院分区:
文献类型:
--
作者:
○芝山啓充;藤森悠介;竹内裕紀;上田善弘;古田巧;川端猛夫;Y. Sato et al (Belle Collaboration)
We report the first measurement of the lepton forward-backward asymmetryas a function of the squared four-momentum of the dilepton system,, for the electroweak penguin processwith a sum of exclusive final states, whereis an electron or a muon andis a hadronic recoil system with anquark. The results are based on a data sample containingpairs recorded at the ϒ(4S) resonance with the Belle detector at the KEKBcollider.for the inclusiveis extrapolated from the sum of 10 exclusivestates whose invariant mass is less than. For,is excluded at thelevel, whereis the standard deviation. For, the result is withinof the standard model theoretical expectation.