Measurement of the B ± production asymmetry and the C P asymmetry in B ± ? J / ? K ± decays
Measurement of the B ± production asymmetry and the C P asymmetry in B ± ? J / ? K ± decays
复制标题
B± 生产不对称性和 B± 中 C P 不对称性的测量
DOI：
10.1103/physrevd.95.052005
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发表时间：
2017
影响因子：
5
通讯作者：
Aaij R
中科院分区：
文献类型：
--
作者：
Aaij R
碰撞中的子产生不对称性是用衰变来测量的。这些数据是在LHC运行1期间由LHCb实验记录的，质心能量为和8 TeV。测量了产生的不对称性、对横动量的积分和范围内的快度为Aprod（B+，s=7 TeV）=（-0.41 <$0.49 ±0.10）×10-2，Aprod（B+，s=8 TeV）=（-0.53 <$0.31 ±0.10）×10-2，其中第一个不确定度是统计的，第二个是系统的。这些产生的不对称性被用来校正衰变的原始不对称性，从而允许测量不对称性，ACP（B+→J/K+）=（0.09±0.27±0.07）×10-2。
Themeson production asymmetry incollisions is measured usingdecays. The data were recorded by the LHCb experiment during Run 1 of the LHC at center-of-mass energies ofand 8 TeV. The production asymmetries, integrated over transverse momenta in the range, and rapidities in the rangeare measured to be Aprod(B+,s=7 TeV)=(-0.41±0.49±0.10)×10-2, Aprod(B+,s=8 TeV)=(-0.53±0.31±0.10)×10-2, where the first uncertainties are statistical and the second are systematic. These production asymmetries are used to correct the raw asymmetries ofdecays, thus allowing a measurement of theasymmetry, ACP(B+→J/ψK+)=(0.09±0.27±0.07)×10-2.