A search for direct CP violation in D0 -> h- h+ (where h=K or pi) ispresented using data corresponding to an integrated luminosity of 1.0 fb^-1collected in 2011 by LHCb in pp collisions at a centre-of-mass energy of 7 TeV.The analysis uses D0 mesons produced in inclusive semileptonic b-hadron decaysto the D0 mu X final state, where the charge of the accompanying muon is usedto tag the flavour of the D0 meson. The difference in the CP-violatingasymmetries between the two decay channels is measured to be Delta A_CP = A_CP(K-K+) - A_CP(pi-pi+) = (0.49 +- 0.30 (stat) +- 0.14 (syst))% . This result does not confirm the evidence for direct CP violation in thecharm sector reported in other analyses.
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机译：使用对应于LHCb在2011年在质心能量处pp碰撞中收集的1.0 fb ^ -1的综合光度的数据来表示D0-> h- h +（其中h = K或pi）中直接CP违反的搜索分析中使用了D0介子，该D0介子是在包含半轻子b强子衰变的D0 mu X最终状态中产生的，其中伴随的介子电荷用于标记D0介子的风味。测量两个衰减通道之间违反CP的不对称性的差异为ΔA_CP = A_CP（K-K +）-A_CP（pi-pi +）=（0.49 +-0.30（stat）+-0.14（syst））％。该结果并不能证实其他分析报告的在香精部门直接违反CP的证据。
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