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

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 root s = 5.02 TeV. We find that the experimental data for the p(T) spectra of Omega and phi exhibit the quark number scaling property, which clearly indicates the quark combination mechanism at hadronization. Experimental data for the p(T) spectra of p, Lambda, Xi, Omega, phi, K*(0) are systematically described by the model. The non-monotonic p(T) dependence of the Omega/phi is naturally explained, and we find that it is closely related to the shape of the logarithm of the strange quark p(T) distribution. Using the p(T) 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 D-0(+), D-s(+) and Lambda(+)(c) as functions of p(T) are systematically described. We predict the differential cross-sections of Xi(0,+)(c) and Omega(0)(c). The ratio Xi(0,+)(c) in our model is approximately 0.16, and Xi(0,+)(c)is approximately 0.012, owing to the cascade suppression of strangeness. In addition, the predicted Xi D-0,+/(c)0 and Omega(0)(c)/D-0更多