The study of B→ K(*)l+l- decays in family non-universal Z' models

中国物理C, 2012, 36(1): 14-24. doi: 10.1088/1674-1137/36/1/003

^1, , ^2, , ^3,

1.Institute of High Energy Physics and Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049, China ;Department of Physics and Center for Mathematics and Theoretical Physics,National Central University, Chungli 320, China Institute of Physics, AS, Taipei 115, China

2.Institute of High Energy Physics and Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049, China ; School of Physics, Shandong University, Jinan 250100, China

3.Institute of High Energy Physics and Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049, China

基金项目: National Natural Science Foundation of China(10735080;11075168;10525523) National Basic Research Program of China (973)(2010CB833000) National Science Council of Taipei((NSC 97-2112-M-008-002-MY3;NCTS)

The study of B→ K(*)l+l- decays in family non-universal Z' models

Cheng-Wei Chiang ^1, , LI Run-Hui ^2, , L(U) Cai-Dian ^3,

1.Institute of High Energy Physics and Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049, China ;Department of Physics and Center for Mathematics and Theoretical Physics,National Central University, Chungli 320, China Institute of Physics, AS, Taipei 115, China

2.Institute of High Energy Physics and Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049, China ; School of Physics, Shandong University, Jinan 250100, China

3.Institute of High Energy Physics and Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049, China

Keywords： forward-backward asymmetry

In a combined investigation of B→ K(*)l+l- decays,constraints on the related couplings in family non-universal Z' models are derived.We find that within the allowed parameter space,the recently observed forward-backward asymmetry in the B → K*l+l- decay can be explained by flipping the signs of the Wilson coefficients Cc++9 and C10.With the obtained constraints,we also calculate the branching ratio of the Bs → μ+μ-decay.The upper bound of our prediction is nearly an order of magnitude smaller than the upper bound given bv the CDF Collaboration recently.

参考文献

[1]	Hewett JL.;Wells JD. .SEARCHING FOR SUPERSYMMETRY IN RARE B DECAYS[J].Physical review.D.Particles and fields,1997(9):5549-5560.
[2]	Barger V.;Chiang CW.;Langacker P.;Lee HS. .Z ' mediated flavor changing neutral currents in B meson decays[J].Physics Letters, B. Nuclear Physics and High Energy Physics,2004(3/4):186-196.
[3]	Chen, SL;Okada, N .Flavorful Z ' signatures at LHC and ILC[J].Physics Letters. B,2008(1):34-38.
[4]	Keum YY.;Sanda AI.;Li HN. .Fat penguins and imaginary penguins in perturbative QCD[J].Physics Letters, B. Nuclear Physics and High Energy Physics,2001(1/2):6-14.
[5]	Cheung K;Chiang CW;Deshpande NG;Jiang J .Constraints on flavor-changing Z ' models by B-s mixing, Z ' production, and B-s ->mu+mu(-)[J].Physics Letters, B. Nuclear Physics and High Energy Physics,2007(5/6):285-291.

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