LHCb探测器上J/ψ对的强产生

J/ψPair Hadroproduction at the LHCb Detector

非相对论量子色动力学是研究强相互作用的重要理论,需要大量的实验来检验理论的有效性。对于强子对撞机上J/ψ对的产生,给出了非相对论量子色动力学框架下色单态福克态的完整次领头阶计算。在LHCb探测器的实验条件下,计算结果表明次领头阶的结果和LHCb探测器给出的J/ψ对质量谱分布不太一致,在小质量区域理论和实验结果曲线行为不同,而且实验数据下降得比理论计算更慢。除了质量谱,还预言了J/ψ对的快度差分布,期待未来能有LHCb实验数据来检验此理论结果。

Nonrelativistic quantum chromodynamics is the important theory for the strong interaction research,and its validity should be tested by various experimental data.For J/ψpair production at hadron colliders,the full next-to-leading order calculations with the color-singlet channel in nonrelativistic quantum chromodynamics are presented.Under the LHCb conditions,the next-to-leading order result is inconsistent with the LHCb J/ψpair mass distribution,and the decline of experimental data is slower than that of theoretical calculation at small mass region,and the curve behavior of theoretical and experimental rusults is different.Besides,the J/ψpair rapidity difference distribution is also predicted,and hopefully the future LHCb data are respected.