First Observation of the Doubly Charmed Baryon Decay Xi( )(cc) -> Xi( )(c)pi( )
First Observation of the Doubly Charmed Baryon Decay Xi( )(cc) -> Xi( )(c)pi( )
复制标题
双魅力重子衰变的首次观测 Xi( )(cc) -> Xi( )(c)pi( )
DOI：
10.1103/physrevlett.121.162002
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发表时间：
2018
影响因子：
8.6
通讯作者：
Appleby R
中科院分区：
文献类型：
--
作者：
Aaij R;Adeva B;Adinolfi M;Aidala C A;Ajaltouni Z;Akar S;Albicocco P;Albrecht J;Alessio F;Alex;er M;Alfonso Albero A;Ali S;Alkhazov G;Cartelle P Alvarez;Alves A A Jr;Amato S;Amerio S;Amhis Y;An L;Anderlini L;Andreassi G;Andreotti M;Andrews J E;Appleby R
双粲重子衰变首次被观测到，具有统计学意义，证实了最近对重子最终状态的观测。所使用的数据样本对应于LHCb实验在质心能量为13 TeV的碰撞中收集的综合光度。测量的质量为3620.6±1.5（stat）±0.4（syst）±0.3（Ξc+） MeV/c2，与之前的结果一致。分支分数衰变模式之间的比率是衡量[B(Ξcc + +→Ξc +π+)×B(Ξc +→pK -π+)]/ [B(Ξcc + +→Λc + K -ππ+ +)×B(Λc +→pK -π+))= 0.035±0.009 (stat)±0.003(系统)。
The doubly charmed baryon decayis observed for the first time, with a statistical significance of, confirming a recent observation of the baryon in thefinal state. The data sample used corresponds to an integrated luminosity of, collected by the LHCb experiment incollisions at a center-of-mass energy of 13 TeV. Themass is measured to be 3620.6±1.5(stat)±0.4(syst)±0.3(Ξc+) MeV/c2 and is consistent with the previous result. The ratio of branching fractions between the decay modes is measured to be [B(Ξcc++→Ξc+π+)×B(Ξc+→pK-π+)]/[B(Ξcc++→Λc+K-π+π+)×B(Λc+→pK-π+)]=0.035±0.009(stat)±0.003(syst).