Measurement of the charm mixing parameter yCP−yCPKπ using two-body D0 meson decays
Measurement of the charm mixing parameter yCP−yCPKπ using two-body D0 meson decays
复制标题
使用二体 D0 介子衰变测量魅力混合参数 yCP–yCPK–
DOI：
10.1103/physrevd.105.092013
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发表时间：
2022
影响因子：
5
通讯作者：
Aidala, C. A.
中科院分区：
文献类型：
--
作者：
Aaij, R.;Abdelmotteleb, A. S. W.;Abellán Beteta, C.;Abudinén, F.;Ackernley, T.;Adeva, B.;Adinolfi, M.;Afsharnia, H.;Agapopoulou, C.;Aidala, C. A.
用LHCb实验测量了在质心能量为13 TeV时，与积分光度对应的质子-质子碰撞的有效衰变宽度和衰变宽度之比.这些观测量给出了魅力混合参数和的测量值，yCPKK-yCPKπ=（7.08±0.30±0.14）×10-3，其中第一个不确定度是统计的，第二个是系统的。这两项测量的结合是，比以前的世界平均水平精确四倍。
A measurement of the ratios of the effective decay widths ofanddecays over that ofdecays is performed with the LHCb experiment using proton–proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of. These observables give access to the charm mixing parametersand, and are measured as, yCPKK-yCPKπ=(7.08±0.30±0.14)×10-3, where the first uncertainties are statistical and the second systematic. The combination of the two measurements is, which is four times more precise than the previous world average.