摘要
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,Λ,Ξ,Ω,φ and K^(+0) are 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 D^(0,+), D^(+)_s), and Λ^(+)_(c) as functions of p are systematically described. We predict the differential cross-sections of Ξ^(0,+)_(c) and Ω^(0)_(c) . The ratio Ξ^(0,+)_(c) /D^0) in our model is approximately 0.16, and Ω^(0)_(c) /D^(0) is approximately 0.012, owing to the cascade suppression of strangeness.In addition, the predicted Ξ^(0,+)_(c) /D^0) ratios exhibit the non-monotonic dependence on pT in the low pT range.
作者
Hai-hong Li
Feng-lan Shao
Jun Song
李海宏;邵凤兰;宋军(School of Physical Science and Intelligent Engineering,Jining University,Shandong 273155,China;School of Physics and Physical Engineering,Qufu Normal University,Shandong 273165,China)
基金
Shandong Province Natural Science Foundation(ZR2019YQ06,ZR2019MA053)
National Natural Science Foundation of China(11975011)
Higher Educational Youth Innovation Science and Technology Program of Shandong Province(2019KJJ010)。
作者简介
corresponding author:Feng-lan Shao,E-mail:shaofl@mail.sdu.edu.cn;corresponding author:Jun Song,E-mail:songjun2011@jnxy.edu.cn。
