Abstract
New results of analysis of top-quark differential cross sections obtained by the CMS and ATLAS Collaborations in pp collisions at the LHC in the framework of z-scaling approach are presented. The spectra are measured over a wide range of collision energy √s = 7, 8, 13 TeV and transverse momentum pT = 30−1000 GeV/c of top-quark using leptonic and jet decay modes. The LHC data on transverse momentum of the top-quark spectra are compared with the Tevatron data obtained by the D∅ Collaboration in pp̅ collisions at√s = 1.96 GeV. Flavour independence of the scaling function ψ(z) in pp and pp̅ interactions over a wide collision energy range√s = 19 − 13000 GeV is verified. This property of ψ(z) was found for different hadrons from π-meson up to ϒ particle. The flavour independence of ψ(z) is used as indication on self-similarity of top-quark production. A tendency to saturation of ψ(z) at low z for top-quark is demonstrated. We anticipate that data on low- and high-pT inclusive spectra of top-quark production at LHC energies could be of interest for verification of the self-similarity over a wide range of masses and different flavour content of produced particles.
Highlights
New results of analysis of top-quark differential cross sections obtained by the CMS and ATLAS Collaborations in pp collisions at the LHC in the framework of zscaling √approach are presented
In the framework of this approach, the transverse momentum spectra of inclusive particles are described in therms of the scaling function ψ(z) in dependence ae-mail: tokarev@jinr.ru be-mail: zborovsky@ujf.cas.cz on self-similarity parameter z
Both are expressed via experimentally measurable quantities
Summary
New results of analysis of top-quark differential cross sections obtained by the CMS and ATLAS Collaborations in pp collisions at the LHC in the framework of zscaling √approach are presented. We anticipate that data on low- and high-pT inclusive spectra of top-quark production at LHC energies could be of interest for verification of the self-similarity over a wide range of masses and different flavour content of produced particles. In the framework of this approach, the transverse momentum spectra of inclusive particles are described in therms of the scaling function ψ(z) in dependence ae-mail: tokarev@jinr.ru be-mail: zborovsky@ujf.cas.cz on self-similarity parameter z.
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