A bstract We present a formalism which uses fluxes of equivalent photons including transverse momenta of the intermediate photons. The formalism reminds the familiar k ~( t )-factorization approach used, e.g., to study the two-gluon production of c c ˉ $$ coverline{c} $$ or b b ˉ $$ boverline{b} $$ pairs. The results of the new method are compared with those obtained using the code lpair, and a good agreement is obtained. The inclusion of the photon transverse momenta is necessary in studies of correlation observables. We present distributions for the dimuon invariant mass, transverse momentum of the muon pair and relative azimuthal angle between muons separately for elastic-elastic, elastic-inelastic, inelastic-elastic and inelastic-inelastic mechanisms. For typical experimental cuts all mechanisms give similar contributions. The results are shown for different sets of cuts relevant for the LHC experiments. The cross sections in different regions of phase space depend on F ~(2)structure function in different regions of x and Q _(2). A comment on F ~(2)is made.
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机译：Bstract我们介绍了一种形式主义，它使用等同的光子的助熔剂，包括中间光子的横向动量。形式主义提醒熟悉的K〜（t） - Factorization方法，例如，研究CCˉ$$ c overline {c} $$或bbˉ$$ b overline {b} $$对。将新方法的结果与使用代码LPAIR获得的结果进行比较，并且获得了良好的协议。在相关可观察到的研究中，包括光子横向动量是必要的。我们呈现了多元不变质量，μ子对横向动量的分布，以及分别用于弹性弹性，弹性，无弹性和无弹性 - 无弹性机构之间的μON之间的相对方位角。对于典型的实验削减，所有机制都提供了类似的贡献。结果显示了对于对LHC实验相关的不同切割集。相位空间的不同区域中的横截面取决于X和Q _（2）的不同区域中的F〜（2）结构函数。对F〜（2）进行评论。
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