Dependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$

The ratios of the cross section of the $\Upsilon$(nS) mesons with $|y|<1.2$ are studied as a function of the number of charged particles with $p_{T}>0.4~\mathrm{GeV}$ and $|\eta|<2.4$ produced in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$. Evidence of a decrease of the ratios between the hi...

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Autor principal: CMS Collaboration
Publicado: 2016
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/2223879
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author CMS Collaboration
author_facet CMS Collaboration
author_sort CMS Collaboration
collection CERN
description The ratios of the cross section of the $\Upsilon$(nS) mesons with $|y|<1.2$ are studied as a function of the number of charged particles with $p_{T}>0.4~\mathrm{GeV}$ and $|\eta|<2.4$ produced in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$. Evidence of a decrease of the ratios between the higher and the lower mass states is observed, that is more pronounced at lower $p_{T}$. For $\Upsilon$(nS) mesons of transverse momentum greater than $7~\mathrm{GeV}$, this effect is studied as a function of the underlying event sphericity, and of the distribution of charged particles with respect to the $\Upsilon$(nS) direction.
id cern-2223879
institution Organización Europea para la Investigación Nuclear
publishDate 2016
record_format invenio
spelling cern-22238792020-07-09T09:53:14Zhttp://cds.cern.ch/record/2223879CMS CollaborationDependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$Particle Physics - ExperimentThe ratios of the cross section of the $\Upsilon$(nS) mesons with $|y|<1.2$ are studied as a function of the number of charged particles with $p_{T}>0.4~\mathrm{GeV}$ and $|\eta|<2.4$ produced in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$. Evidence of a decrease of the ratios between the higher and the lower mass states is observed, that is more pronounced at lower $p_{T}$. For $\Upsilon$(nS) mesons of transverse momentum greater than $7~\mathrm{GeV}$, this effect is studied as a function of the underlying event sphericity, and of the distribution of charged particles with respect to the $\Upsilon$(nS) direction.CMS-PAS-BPH-14-009oai:cds.cern.ch:22238792016
spellingShingle Particle Physics - Experiment
CMS Collaboration
Dependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$
title Dependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$
title_full Dependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$
title_fullStr Dependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$
title_full_unstemmed Dependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$
title_short Dependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$
title_sort dependence of the $\upsilon$(ns) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{tev}$
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2223879
work_keys_str_mv AT cmscollaboration dependenceoftheupsilonnsproductionratiosonchargedparticlemultiplicityinppcollisionsatsqrts7mathrmtev

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