...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review, D >Sensitivity bounds on heavy neutrino mixing |UμN|2 and |UτN|2 from LHCb upgrade
【24h】

Sensitivity bounds on heavy neutrino mixing |UμN|2 and |UτN|2 from LHCb upgrade

机译：LHCb升级产生的重中微子混合|UμN| 2和|UτN| 2的灵敏度范围

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Decays of heavy pseudoscalar mesons B , B c , B s , and D s at the LHCb upgrade are considered, which produce either two equal sign muons or taus. In addition, we consider the analogous decays with opposite sign muons or taus. All these decays are considered to be mediated by a heavy on-shell neutrino N . Such decays of B mesons, if not detected, will give, in general, stringent upper bounds on the heavy-light mixing parameter | U μ N | 2 as a function of the neutrino mass M N ～ 1 ? ? GeV , principally due to the large expected number of produced mesons B . While some of the decays of the other mentioned mesons are attractive due to a weaker Cabibbo-Kobayashi-Maskawa suppression, the expected produced number of such mesons is significantly smaller that of B ’s; therefore, the sensitivity bounds from such decays are, in general, comparable or less restrictive. When τ pairs are produced, only two types of such decays are significant: B ± , B c ± → τ ± τ ± π ? (and τ ± τ ? π ± ), giving us stringent upper bounds on | U τ N | 2 ; the other decays with a pair of τ , such as B 0 → D ( * ) ? τ + τ + π ? (and D ( * ) ? τ + τ ? π + ), are prohibited or very suppressed by kinematics.
机译：考虑了LHCb升级时重假标量介子B，B c，B s和D s的衰变，它们会产生两个等号的介子或taus。另外，我们考虑具有相反符号μ或taus的类似衰减。所有这些衰变被认为是由重的壳中微子N介导的。如果没有检测到，B介子的这种衰变通常会在强光混合参数| |上给出严格的上限。 UμN | 2是中微子质量M N〜1的函数？ GeV，主要是由于预期产生大量介子B。尽管由于Cabibbo-Kobayashi-Maskawa抑制作用较弱，其他提到的介子的衰变很有吸引力，但此类介子的预期产生数量却大大少于B。因此，这种衰减的灵敏度范围通常具有可比性或限制性较小。当产生τ对时，这种衰减只有两种类型是显着的：B±，B c±→τ±τ±π？ （和τ±τ？π±），给我们严格的上界。 UτN | 2;另一个以一对τ衰减，如B 0→D（*）？ τ+τ+π？运动学禁止（和D（*）？τ+τ？π+）。

著录项

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