Measurement of the ratio of branching fractions B(B-c( ) -> J/psi K )/B(B-c( ) -> J/psi pi( ))
Measurement of the ratio of branching fractions B(B-c( ) -> J/psi K )/B(B-c( ) -> J/psi pi( ))
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支化分数比的测量 B(B-c( ) -> J/psi K )/B(B-c( ) -> J/psi pi( ))
DOI：
10.1007/jhep09(2016)153
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发表时间：
2016
期刊：
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通讯作者：
d'Arge
中科院分区：
文献类型：
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作者：
Aaij R;Adeva B;Adinolfi M;Ajaltouni Z;Akar S;Albrecht J;Alessio F;Alex;er M;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 B;Gutierrez O Aquines;Archilli F;d'Arge
分支分数$R_{K/\pi} \equiv \mathcal{B}（B_{c}^{+} \to J/\psi K^{+}）/\mathcal{B}（B_{c}^{+} \to J/\psi\pi^{+}）$的比值是用LHC B实验在质心能量为7 TeV和8 TeV时收集的碰撞数据测量的，对应于积分光度为3。它被发现是，其中第一个不确定性是统计的，第二个是系统的。该测量结果与之前的LHCb结果一致，同时不确定性显著降低。
The ratio of branching fractions $R_{K/\pi} \equiv \mathcal{B}(B_{c}^{+} \to J/\psi K^{+})/\mathcal{B}(B_{c}^{+} \to J/\psi\pi^{+})$ is measured withcollision data collected by the LHCb experiment at centre-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 3. It is found to be, where the first uncertainty is statistical and the second is systematic. This measurement is consistent with the previous LHCb result, while the uncertainties are significantly reduced.