Top-quark pT-spectra at CMS and flavor independence of z-scaling |
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Authors: | M. Tokarev I. Zborovský |
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Affiliation: | 1.Joint Institute for Nuclear Research,Dubna, Moscow region,Russia;2.Nuclear Physics Institute,Academy of Sciences of the Czech Republic,?e?,Czech Republic |
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Abstract: | We present new results of analysis of top-quark differential cross sections obtained by the CMS Collaboration in pp collisions in the framework of the z-scaling approach. The spectra are measured over a wide range of collision energy (sqrt s = 7,8,13TeV) and transverse momentum p T = 30?500 GeV/c of top-quark using leptonic and jet decay modes. Flavor independence of the scaling function ψ(z) is verified in the new kinematic range. The results of analysis of the top-quark spectra obtained at the LHC are compared with similar spectra measured in (overline p p) collisions at the Tevatron energy (sqrt s = 1.96TeV). A tendency to saturation of ψ(z) for the process at low z and a power-law behavior of ψ(z) at high z is observed. The measurements of high-p T is observed. The measurements of highspectra of the top-quark production at highest LHC energy is of interest for verification of self-similarity of particle production, understanding flavor origin and search for new physics symmetries with top-quark probe. |
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