Cargando…
Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$
The differential yields of charged particles having pseudorapidity within $|\eta|<1$ are measured using 3.42 $\mu\mathrm{b}^{-1}$ of XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$ collected in 2017 by the CMS experiment at the LHC. The yields are reported as functions of collision...
Autor principal: | |
---|---|
Publicado: |
2018
|
Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2317406 |
_version_ | 1780958283839832064 |
---|---|
author | CMS Collaboration |
author_facet | CMS Collaboration |
author_sort | CMS Collaboration |
collection | CERN |
description | The differential yields of charged particles having pseudorapidity within $|\eta|<1$ are measured using 3.42 $\mu\mathrm{b}^{-1}$ of XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$ collected in 2017 by the CMS experiment at the LHC. The yields are reported as functions of collision centrality and transverse momentum, $p_{\mathrm{T}}$, from 0.5 to 100$~\mathrm{GeV}$. A previously reported $p_{\mathrm{T}}$ spectrum from pp collisions at $\sqrt{s}=5.02~\mathrm{TeV}$ is extrapolated in center-of-mass energy to form a suitable reference for comparison. The nuclear modification factors, $R^{*}_{\mathrm{AA}}$, are constructed with this extrapolated reference and compared to previous measurements and theoretical predictions. In head-on collisions the $R^{*}_{\mathrm{AA}}$ is suppressed by a factor of six in the $p_{\mathrm{T}}$ range of 6--9$~\mathrm{GeV}$ but increases to approximately 0.7 at $100~\mathrm{GeV}$. A ratio between the XeXe spectra and previously reported spectra from PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02~\mathrm{TeV}$ indicates a notably smaller suppression of charged-particle production for the same centrality selection and $p_{\mathrm{T}}>6~\mathrm{GeV}$. However, the suppression in XeXe events is slightly greater than in PbPb collisions when comparing selections having a similar number of participating nucleons. |
id | cern-2317406 |
institution | Organización Europea para la Investigación Nuclear |
publishDate | 2018 |
record_format | invenio |
spelling | cern-23174062019-09-30T06:29:59Zhttp://cds.cern.ch/record/2317406CMS CollaborationCharged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$Nuclear Physics - ExperimentThe differential yields of charged particles having pseudorapidity within $|\eta|<1$ are measured using 3.42 $\mu\mathrm{b}^{-1}$ of XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$ collected in 2017 by the CMS experiment at the LHC. The yields are reported as functions of collision centrality and transverse momentum, $p_{\mathrm{T}}$, from 0.5 to 100$~\mathrm{GeV}$. A previously reported $p_{\mathrm{T}}$ spectrum from pp collisions at $\sqrt{s}=5.02~\mathrm{TeV}$ is extrapolated in center-of-mass energy to form a suitable reference for comparison. The nuclear modification factors, $R^{*}_{\mathrm{AA}}$, are constructed with this extrapolated reference and compared to previous measurements and theoretical predictions. In head-on collisions the $R^{*}_{\mathrm{AA}}$ is suppressed by a factor of six in the $p_{\mathrm{T}}$ range of 6--9$~\mathrm{GeV}$ but increases to approximately 0.7 at $100~\mathrm{GeV}$. A ratio between the XeXe spectra and previously reported spectra from PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02~\mathrm{TeV}$ indicates a notably smaller suppression of charged-particle production for the same centrality selection and $p_{\mathrm{T}}>6~\mathrm{GeV}$. However, the suppression in XeXe events is slightly greater than in PbPb collisions when comparing selections having a similar number of participating nucleons.CMS-PAS-HIN-18-004oai:cds.cern.ch:23174062018 |
spellingShingle | Nuclear Physics - Experiment CMS Collaboration Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$ |
title | Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$ |
title_full | Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$ |
title_fullStr | Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$ |
title_full_unstemmed | Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$ |
title_short | Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44~\mathrm{TeV}$ |
title_sort | charged-particle nuclear modification factors in xexe collisions at $\sqrt{s_{\mathrm{nn}}}=5.44~\mathrm{tev}$ |
topic | Nuclear Physics - Experiment |
url | http://cds.cern.ch/record/2317406 |
work_keys_str_mv | AT cmscollaboration chargedparticlenuclearmodificationfactorsinxexecollisionsatsqrtsmathrmnn544mathrmtev |