...
首页> 外文期刊>The European physical journal, C. Particles and fields >A measurement of the semileptonic branching ratio BR(b-baryon → pl(v-bar)X) and a study of inclusive π~±, K~±, (p, p-bar) production in Z decays
【24h】

A measurement of the semileptonic branching ratio BR(b-baryon → pl(v-bar)X) and a study of inclusive π~±, K~±, (p, p-bar) production in Z decays

机译:Z衰变过程中半轻子分支比BR(b-baryon→pl(v-bar)X)的测量以及包含性π〜±,K〜±,(p,p-bar)的研究

获取原文
获取原文并翻译 | 示例
           

摘要

Inclusive π~±, K~± and (p, p-bar) production is investigated using data recorded by the ALEPH detector between 1992 and 1994. The momentum spectra and multiplicities are measured separately in Z → b(b-bar), Z → c(c-bar) and Z → u(u-bar), d(d-bar), s(s-bar) decays. The number of protons found in b-hadron decays is used to estimate the fraction of b-baryons in b events to be (10.2 ± 0.7 ± 2.7)% assuming BR(b-baryon → pX) = (58 ± 6)%. From an additional study of proton-lepton correlations in b events, the branching ratio BR(b-baryon → pl(v-bar)X) = (4.63 ± 0.72 ± 0.098)% is obtained. The ratio BR(b-baryon → pl(v-bar)X)/BR(b-baryon → pX) is found to be 0.080 ± 0.012 ± 0.014.
机译:使用ALEPH检测器在1992年至1994年之间记录的数据研究了π〜±,K〜±和(p,p-bar)的产生。动量谱和多重性分别在Z→b(b-bar),Z中测量→c(c-bar)和Z→u(u-bar),d(d-bar),s(s-bar)衰减。假设BR(b-重子→pX)=(58±6)%,则使用b-强子衰变中发现的质子数来估计b事件中b-重子的比例为(10.2±0.7±2.7)%。通过对b事件中质子-轻子相关性的另一项研究,得出分支比率BR(b-重子→pl(v-bar)X)=(4.63±0.72±0.098)%。发现BR(b-重子→pl(v-bar)X)/ BR(b-重子→pX)之比为0.080±0.012±0.014。

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号