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The study of B→K（＊）l＋l- decays in family non-universal Z′ models
  • ISSN号：1674-1137
  • 期刊名称：《中国物理C：英文版》
  • 时间：0
  • 分类：O571.3[理学—粒子物理与原子核物理;理学—物理] S758[农业科学—森林经理学;农业科学—林学]
  • 作者机构：[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, [2]Department of Physics and Center for Mathematics and Theoretical Physics, National Central University, Chungli 320, China, [3]Institute of Physics, ASI Taipei 115, China, [4]School of Physics, Shandong University, Jinan 250100, China
  • 相关基金：Supported by National Science Council of Taipei （NSC 97-2112-M-008-002-MY3 NCTS）; National Natural Science Foundation of China （10735080 11075168 10525523）; National Basic Research Program of China （973） （2010CB833000）
作者： 蒋正伟[2,3], 李润辉[1,4], 吕才典[1]
关键词： 模型推导, 衰变, 通用, 家庭, 参数空间, 不对称, 威尔逊, 分支比, forward-backward asymmetry, new physics, semi-leptonic decay
中文摘要：

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 C eff 9 and C 10 . With the obtained constraints, we also calculate the branching ratio of the B s →μ + μ - decay. The upper bound of our prediction is nearly an order of magnitude smaller than the upper bound given by the CDF Collaboration recently.

英文摘要：

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 C eff 9 and C 10 . With the obtained constraints, we also calculate the branching ratio of the B s →μ ＋ μ - decay. The upper bound of our prediction is nearly an order of magnitude smaller than the upper bound given by the CDF Collaboration recently.

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期刊信息
  • 《中国物理C：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院高能物理研究所 中国科学院近代物理研究所
  • 主编：王贻芳
  • 地址：北京市玉泉路19号（乙）
  • 邮编：100049
  • 邮箱：cpc@mail.ihep.ac.cn
  • 电话：010-88235947
  • 国际标准刊号：ISSN：1674-1137
  • 国内统一刊号：ISSN：11-5641/O4
  • 邮发代号:2-522
  • 获奖情况:
  • 2000年获中国科学院优秀期刊评比一等奖,中国期刊方阵“双百”期刊
  • 国内外数据库收录:
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  • 被引量:189