Measurements of the branching fractions and C P asymmetries of B ± ? J / ? p ± and B ± ? ? ( 2 S ) p ± decays

Measurements of the branching fractions and C P asymmetries of B ± ? J / ? p ± and B ± ? ? ( 2 S ) p ± decays
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B ± 的支化分数和 C P 不对称性的测量

DOI:
10.1103/physrevd.85.091105
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发表时间:
2012
期刊:
影响因子:
5
通讯作者:
Aaij R
Aaij R
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Aaij R

文献摘要

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用质子-质子碰撞的数据研究了质子和衰变。发现它们的支化分数为<?format ?> B(B±→J/π π±)=(3.88±0.11±0.15)×10- 5和B(B±→ π(2S)π±)=(2.52±0.26±0.15)×10-5,其中第一个不确定度与样本的统计量有关,第二个不确定度量化系统效应。在这些模中测得的非对称性为ACPJ/π π=0.005±0.027± 0.011和ACPJ(2S)π=0.048±0.090±0.011,没有发现直接破坏的证据。
A study ofanddecays is performed with data corresponding toof proton-proton collisions at. Their branching fractions are found to be <?format ?>B(B±→J/ψπ±)=(3.88±0.11±0.15)×10-5andB(B±→ψ(2S)π±)=(2.52±0.26±0.15)×10-5,where the first uncertainty is related to the statistical size of the sample and the second quantifies systematic effects. The measuredasymmetries in these modes are ACPJ/ψπ=0.005±0.027±0.011andACPψ(2S)π=0.048±0.090±0.011 with no evidence of directviolation seen.