| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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Large Dimuon Asymmetry and a Non-Universal Z′ Boson in the Bs−Bs System |
| CHANG Qin1,2, WANG Ru-Min3, XU Yuan-Guo3, CUI Xiao-Wei1
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1Department of Physics, Henan Normal University, Xinxiang 453007
2Institute of Particle Physics, Huazhong Normal University, Wuhan 430079
3College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000
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| Cite this article: |
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CHANG Qin, WANG Ru-Min, XU Yuan-Guo et al 2011 Chin. Phys. Lett. 28 081301 |
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Abstract Motivated by recently observed anomalously large dimuon charge asymmetry in neutral B decays reported by the D0 collaboration, we study the effects of a family of non-universal Z′ bosons for possible solutions. The fitting results for the Z′ parameters are presented under the constraints from the D0 result for asls and UTfit results for CBs and φBs in two limiting scenarios for left− and right-handed b-s-Z′ couplings. We find the couplings BsbL and BsbR are rigorously bounded but not excluded, which means that the anomalies in the Bs−Bs system could be moderated simultaneously within a non-universal Z′ model. Numerically, a new weak phase φLs ∼−60° (−80°) in scenario I or ∼30°(10°) in scenario II is crucial to moderate the large dimuon charge asymmetry.
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| Keywords:
13.25.Hw
12.60.Cn
12.15.Mm
11.30.Hv.
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Received: 16 May 2011
Published: 28 July 2011
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