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

Abstract

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 √s= 5.02 TeV. We find that the experimental data for the PT spectra of ω and φ exhibit the quark number scaling property, which clearly indicates the quark combination mechanism at hadronization. Experimental data for the PT spectra of p, Δ Ξ,Ω ,φ, and K∗oare systematically described by the model. The non-monotonic PT dependence of the Ω/φ 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 PT spectrum of charm quarks, which is consistent with perturbative QCD calculations, the experimental data for differential cross-sections of Do,+,D+s, and Δ+cas functions of PT are systematically described. We predict the differential cross-sections of Ξ 0+cand Ωoc. The ratio Ξo,+cin our model is approximately 0.16, and Ωoc/Dois approximately 0.012, owing to the cascade suppression of strangeness. In addition, the predicted Ξ0+c/Doand Ω0c/Doratios exhibit the non-monotonic dependence on PT in the low PT range.