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arXiv 1409.0134hep-ex
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LHC b中$B_s^0$衰变中的$CP$破坏

$CP$ violation in $B_s^0$ decays at LHCb

Sean Benson

摘要:

基于LHC运行I期间收集的$pp$碰撞数据,给出了混合和衰变之间干涉中$CP$破坏的最新LHC b测量结果,对应于$3.0\, {\rm fb}^{-1}$的积分光度。大约$27\, 000$ $B_s^0\to J/ψπ^+π^-$信号事件被用来进行目前$b\to c\bar{c}s$跃迁中$CP$破坏相的最精确的单次测量,$ϕ_s^{c\bar{c}s}=0.070\pm0.068{\rm (stat.)}\pm0.008{\rm (syst.)}$ rad。从近似$4\, 000$ $B_s^0\to ϕϕ$信号事件发现,$b\to s\bar{s}s$跃迁中$CP$破坏相位的最精确测量值$ϕ_s^{s\bar{s}s}$为$ϕ_s^{s\bar{s}s}=-0.17\pm{\rm (stat.)}0.15\pm0.03{\rm (syst.)}$ rad。

英文摘要:

Latest LHCb measurements of $CP$ violation in the interference between mixing and decay are presented based on $pp$ collision data collected during LHC Run I, corresponding to an integrated luminosity of $3.0\, {\rm fb}^{-1}$. Approximately $27\, 000$ $B_s^0\to J/ψπ^+π^-$ signal events are used to make what is at the moment the most precise single measurement of the $CP$-violating phase in $b\to c\bar{c}s$ transitions, $ϕ_s^{c\bar{c}s}=0.070\pm0.068{\rm (stat.)}\pm0.008{\rm (syst.)}$ rad. The most accurate measurement of the $CP$-violating phase in $b\to s\bar{s}s$ transitions, $ϕ_s^{s\bar{s}s}$, is found from approximately $4\, 000$ $B_s^0\to ϕϕ$ signal events to be $ϕ_s^{s\bar{s}s}=-0.17\pm{\rm (stat.)}0.15\pm0.03{\rm (syst.)}$ rad.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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