Production of light-flavor and single-charmed hadrons in pp collisions at ■= 5.02 TeV in an equal-velocity quark combination model

作者：李海宏; 邵凤兰^*; 宋军^*

来源：Chinese Physics C, 2021, 45(11): 64-75.

We apply an equal-velocity quark combination model to study the production of light-flavor hadrons and single-charmed hadrons at midrapidity in the pp collisions at ■= 5.02 TeV. We find that the experimental data for the pT spectra of ? and ■ exhibit the quark number scaling property, which clearly indicates the quark combination mechanism at hadronization. Experimental data for the pT spectra of ■ and K*0 are systematically described by the model. The non-monotonic pT dependence of the ?/■ ratio is naturally explained, and we find that it is closely related to the shape of the logarithm of the strange quark pT distribution. Using the pT spectra of light-flavor quarks obtained from light-flavor hadrons and the p T spectrum of charm quarks, which is consistent with perturbative QCD calculations, the experimental data for differential cross-sections of D0,+, Ds+, and Λc+ as functions of p are systematically described. We predict the differential cross-sections of ■. The ratio ■ in our model is approximately 0.16, and ? c0/D0 is approximately 0.012, owing to the cascade suppression of strangeness.In addition, the predicted ■ ratios exhibit the non-monotonic dependence on pT in the low pT range.

• 单位
  济宁学院