Possibility for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math>suppression in high-multiplicity proton-proton collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>7</mml:mn></mml:mrow></mml:math>TeV

Lang, Thomas; Bleicher, Marcus

doi:10.1103/physrevc.87.024907

Cited by 10 publications

(9 citation statements)

References 39 publications

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“…In high energy hadronic collisions, multiple parton–parton interactions may also affect heavy-flavour production [ 262 , 263 ], in competition to a large amount of QCD-radiation associated to hard processes. In addition to these initial-state effects, heavy-flavour production could suffer from final-state effects due to the high multiplicity environment produced in high energy collisions [ 264 , 265 ].…”

Section: Heavy Flavour and Quarkonium Production In Proton–proton Colmentioning

confidence: 99%

Heavy-flavour and quarkonium production in the LHC era: from proton–proton to heavy-ion collisions

et al. 2016

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This report reviews the study of open heavy-flavour and quarkonium production in high-energy hadronic collisions, as tools to investigate fundamental aspects of Quantum Chromodynamics, from the proton and nucleus structure at high energy to deconfinement and the properties of the Quark–Gluon Plasma. Emphasis is given to the lessons learnt from LHC Run 1 results, which are reviewed in a global picture with the results from SPS and RHIC at lower energies, as well as to the questions to be addressed in the future. The report covers heavy flavour and quarkonium production in proton–proton, proton–nucleus and nucleus–nucleus collisions. This includes discussion of the effects of hot and cold strongly interacting matter, quarkonium photoproduction in nucleus–nucleus collisions and perspectives on the study of heavy flavour and quarkonium with upgrades of existing experiments and new experiments. The report results from the activity of the SaporeGravis network of the I3 Hadron Physics programme of the European Union 7 Framework Programme.

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Section: Heavy Flavour and Quarkonium Production In Proton–proton Colmentioning

confidence: 99%

Heavy-flavour and quarkonium production in the LHC era: from proton–proton to heavy-ion collisions

et al. 2016

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“…These observations suggest that different phenomena need to be considered for a full understanding of the quarkonium and heavy-flavour production mechanisms. An analysis of the dependence of quarkonium yields as a function of the number of charged particles produced in the event in pp collisions may help to resolve some of these questions [20,21], in particular in interpreting the observed production rates in heavy ion collisions [22].…”

Section: Jhep11(2020)001mentioning

confidence: 99%

Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at $$ \sqrt{s} $$ = 7 TeV

Sirunyan¹,

Tumasyan²,

Adam³

et al. 2020

J. High Energ. Phys.

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The ratios of the production cross sections between the excited ϒ(2S) and ϒ(3S) mesons and the ϒ(1S) ground state, detected via their decay into two muons, are studied as a function of the number of charged particles in the event. The data are from proton-proton collisions at $$ \sqrt{s} $$ s = 7 TeV, corresponding to an integrated luminosity of 4.8 fb−1, collected with the CMS detector at the LHC. Evidence of a decrease in these ratios as a function of the particle multiplicity is observed, more pronounced at low transverse momentum $$ {p}_{\mathrm{T}}^{\upmu \upmu} $$ p T μμ . For ϒ(nS) mesons with $$ {p}_{\mathrm{T}}^{\upmu \upmu} $$ p T μμ > 7 GeV, where most of the data were collected, the correlation with multiplicity is studied as a function of the underlying event transverse sphericity and the number of particles in a cone around the ϒ(nS) direction. The ratios are found to be multiplicity independent for jet-like events. The mean $$ {p}_{\mathrm{T}}^{\upmu \upmu} $$ p T μμ values for the ϒ(nS) states as a function of particle multiplicity are also measured and found to grow more steeply as their mass increases.

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“…They can provide information on the role of multi-parton interactions (MPI) where several hard parton-parton interactions take place in the same event with no correlations among them [200][201][202][203]. In addition, heavy-flavour production could be affected from final-state effects because of the high-multiplicity environment of high-energy pp collisions [204,205]. The yields of inclusive J/ψ, non-prompt J/ψ and prompt D mesons were measured in pp at √ s = 7 TeV as a function of the charged-particle multiplicity and were found to increase with increasing multiplicity for measurements at midrapidity.…”

Section: Quarkoniamentioning

confidence: 99%

An overview of experimental results from ultra-relativistic heavy-ion collisions at the CERN LHC: Hard probes

Foka

Janik

2016

Reviews in Physics

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The first collisions of lead nuclei, delivered by the CERN Large Hadron Collider (LHC) at the end of 2010, at a centreof-mass energy per nucleon pair √ s NN = 2.76 TeV, marked the beginning of a new era in ultra-relativistic heavy-ion physics. The study of the properties of the produced hot and dense strongly-interacting matter at these unprecedented energies is currently experimentally pursued by all four big LHC experiments, ALICE, ATLAS, CMS, and LHCb. The more than a factor 10 increase of collision energy at LHC, relative to the previously achieved maximal energy at other collider facilities, results in an increase of production rates of hard probes. This review presents selected experimental results focusing on observables probing hard processes in heavy-ion collisions delivered during the first three years of the LHC operation. It also presents the first results from Run 2 heavy-ion data at the highest energy, as well as from the studies of the reference pp and p-Pb systems, which are an integral part of the heavy-ion programme. (Małgorzata Anna Janik) 1 In fact, it is a pseudo-critical temperature as 'lattice QCD' calculations indicate a crossover rather than a well defined phase transition [2,3].

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Possibility forJ/ψsuppression in high-multiplicity proton-proton collisions atsNN=7TeV

Cited by 10 publications

References 39 publications

Heavy-flavour and quarkonium production in the LHC era: from proton–proton to heavy-ion collisions

Heavy-flavour and quarkonium production in the LHC era: from proton–proton to heavy-ion collisions

Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at $$ \sqrt{s} $$ = 7 TeV

An overview of experimental results from ultra-relativistic heavy-ion collisions at the CERN LHC: Hard probes

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