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Study of scalar meson a0（980） from B → a0（980）π decays
  • ISSN号：1674-1137
  • 期刊名称：《中国物理C：英文版》
  • 时间：0
  • 分类：O572.2[理学—粒子物理与原子核物理;理学—物理] O156.1[理学—数学;理学—基础数学]
  • 作者机构：[1]Department of Physics, Henan University of Technology, Zhengzhou, Henan 450052, China, [2]Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, Jiangsu 210097, China
  • 相关基金：Supported by National Natural Science Foundation of China （10575052, 10735080）
作者： 张志清[1,2], 肖振军[2]
关键词： 衰变分支比, Π, 微扰QCD, 介子, 标量, CP破坏, 不对称, 因子化, B meson decay, the pQCD factorization approach, branching ratio, CP asymmetry
中文摘要：

In this paper,we calculate the branching ratios and the direct CP-violating asymmetries for decays B0 →a00(980)π0,a0+(980)π-,a0-(980)π+ and B- →a00(980)π-,a0-(980)π0 by employing the perturbative QCD(pQCD) factorization approach at the leading order.We found that(a) the pQCD predictions for the branching ratios are around(0.4-2.8)×10-6,consistent with currently available experimental upper limits;(b) the CP asymmetries of B0 →a00(980)π0 and B- →a0-(980)π0 decays can be large,about(70-80)% for α=100-.

英文摘要：

In this paper, we calculate the branching ratios and the direct CP-violating asymmetries for decays B^0 → a0^0（980）π^0, a0^＋ （980）π^-, a0^-（980）π^＋ and B^- → a0^0 （980）π^-, a0^- （980）π^0 by employing the perturbative QCD （pQCD） factorization approach at the leading order. We found that （a） the pQCD predictions for the branching ratios are around （0.4-2.8） × 10^-6, consistent with currently available experimental upper limits; （b） the CP asymmetries of B^0→ a0^0（980）π^0 and B^- → a0^- （980）π^0 decays can be large, about （70-80）% for α= 100°.

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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