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Top-quark p$_{T}$ -spectra at CMS and flavor independence of z-scaling

Tokarev, M. (Dubna, JINR) ; Zborovský, I. (Rez, Nucl. Phys. Inst.)
Springer

Published in: Phys.Part.Nucl.Lett.
Year: 2017
Vol.: 14    Num./Issue: 5
Page No: 681-686
Pages: 6
Year: 2017-09-09 Springer published

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.

Keyword(s): high energy ; proton-proton collisions ; self-similarity ; top quark spectra

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DOI: 10.1134/S1547477117050107