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Non-prompt J/$\psi$ measurements at midrapidity in pp, p-Pb and Pb-Pb collisions with ALICE

The J/$\psi$ production is sensitive to the presence of the deconfined state of quarks and gluons, quark-gluon plasma (QGP), which is expected to form in ultrarelativistic nuclear collisions. Measurements of non-prompt J/$\psi$ originating from the weak decays of b-hadrons, can provide an estimate o...

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Autor principal: Sharma, Himanshu
Lenguaje:eng
Publicado: 2022
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.380.0239
http://cds.cern.ch/record/2836712
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author Sharma, Himanshu
author_facet Sharma, Himanshu
author_sort Sharma, Himanshu
collection CERN
description The J/$\psi$ production is sensitive to the presence of the deconfined state of quarks and gluons, quark-gluon plasma (QGP), which is expected to form in ultrarelativistic nuclear collisions. Measurements of non-prompt J/$\psi$ originating from the weak decays of b-hadrons, can provide an estimate of beauty quark production in nuclear collisions. It is observed that the production of non-prompt J/$\psi$ is modified in Pb$-$Pb collisions in comparison to that in pp collisions at the same energy scaled by the number of binary collisions, as quantified by nuclear modification factors $(R_{\rm AA})$. It is related to hot medium effects taking place during the QGP phase. The measurement of nuclear modification factors in p$-$Pb collisions is used to assess the so-called Cold Nuclear Matter (CNM) effects which can further modify the production yields of non-prompt J/$\psi$ in collisions involving heavy-ions. The ALICE detector has excellent capabilities to measure J/$\psi$ in the $e^+e^-$ decay channel at midrapidity down to zero transverse momentum $(p_{\rm T})$ allowing the statistical separation of the non-prompt J/$\psi$ component for $p_{\rm T}$ down to $p_{\rm T}$ = 1 GeV/$c$. In this contribution \textendash , ALICE midrapidity results on non-prompt J/$\psi$ production cross sections in pp collisions are presented and compared with the theoretical models. Moreover, $R_{\rm AA}$ of non-prompt J/$\psi$ at midrapidity as a function of $p_{\rm T}$ in p$-$Pb collisions at the center-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}}$ = 5.02 TeV are presented and further compared with $R_{\rm AA}$ of non-prompt J/$\psi$ in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV. Furthermore, results are compared with theoretical predictions.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2022
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spelling cern-28367122022-10-13T19:32:25Zdoi:10.22323/1.380.0239http://cds.cern.ch/record/2836712engSharma, HimanshuNon-prompt J/$\psi$ measurements at midrapidity in pp, p-Pb and Pb-Pb collisions with ALICENuclear Physics - ExperimentParticle Physics - ExperimentThe J/$\psi$ production is sensitive to the presence of the deconfined state of quarks and gluons, quark-gluon plasma (QGP), which is expected to form in ultrarelativistic nuclear collisions. Measurements of non-prompt J/$\psi$ originating from the weak decays of b-hadrons, can provide an estimate of beauty quark production in nuclear collisions. It is observed that the production of non-prompt J/$\psi$ is modified in Pb$-$Pb collisions in comparison to that in pp collisions at the same energy scaled by the number of binary collisions, as quantified by nuclear modification factors $(R_{\rm AA})$. It is related to hot medium effects taking place during the QGP phase. The measurement of nuclear modification factors in p$-$Pb collisions is used to assess the so-called Cold Nuclear Matter (CNM) effects which can further modify the production yields of non-prompt J/$\psi$ in collisions involving heavy-ions. The ALICE detector has excellent capabilities to measure J/$\psi$ in the $e^+e^-$ decay channel at midrapidity down to zero transverse momentum $(p_{\rm T})$ allowing the statistical separation of the non-prompt J/$\psi$ component for $p_{\rm T}$ down to $p_{\rm T}$ = 1 GeV/$c$. In this contribution \textendash , ALICE midrapidity results on non-prompt J/$\psi$ production cross sections in pp collisions are presented and compared with the theoretical models. Moreover, $R_{\rm AA}$ of non-prompt J/$\psi$ at midrapidity as a function of $p_{\rm T}$ in p$-$Pb collisions at the center-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}}$ = 5.02 TeV are presented and further compared with $R_{\rm AA}$ of non-prompt J/$\psi$ in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV. Furthermore, results are compared with theoretical predictions.oai:cds.cern.ch:28367122022
spellingShingle Nuclear Physics - Experiment
Particle Physics - Experiment
Sharma, Himanshu
Non-prompt J/$\psi$ measurements at midrapidity in pp, p-Pb and Pb-Pb collisions with ALICE
title Non-prompt J/$\psi$ measurements at midrapidity in pp, p-Pb and Pb-Pb collisions with ALICE
title_full Non-prompt J/$\psi$ measurements at midrapidity in pp, p-Pb and Pb-Pb collisions with ALICE
title_fullStr Non-prompt J/$\psi$ measurements at midrapidity in pp, p-Pb and Pb-Pb collisions with ALICE
title_full_unstemmed Non-prompt J/$\psi$ measurements at midrapidity in pp, p-Pb and Pb-Pb collisions with ALICE
title_short Non-prompt J/$\psi$ measurements at midrapidity in pp, p-Pb and Pb-Pb collisions with ALICE
title_sort non-prompt j/$\psi$ measurements at midrapidity in pp, p-pb and pb-pb collisions with alice
topic Nuclear Physics - Experiment
Particle Physics - Experiment
url https://dx.doi.org/10.22323/1.380.0239
http://cds.cern.ch/record/2836712
work_keys_str_mv AT sharmahimanshu nonpromptjpsimeasurementsatmidrapidityinppppbandpbpbcollisionswithalice