Centrality dependence of particle production in p–Pb collisions at √sNN= 5.02 TeV

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dc.contributor.authorAdam, J
dc.contributor.authorAdamová, D
dc.contributor.authorAggarwal, M M
dc.contributor.authorAglieri Rinella, G
dc.contributor.authorAgnello, M
dc.contributor.authorAgostinelli, A
dc.contributor.authorAgrawal, N
dc.contributor.authorAhammed, Z
dc.contributor.authorAhmed, I
dc.contributor.authorAhn, S U
dc.contributor.authorAimo, I
dc.contributor.authorAiola, S
dc.contributor.authorAjaz, M
dc.contributor.authorAkindinov, A
dc.contributor.authorAlam, S N
dc.contributor.authorAleksandrov, D
dc.contributor.authorAlessandro, B
dc.contributor.authorAlexandre, D
dc.contributor.authorAlfaro Molina, R
dc.contributor.authorAlici, A
dc.contributor.authorAlkin, A
dc.contributor.authorAlme, J
dc.contributor.authorAlt, T
dc.contributor.authorAltinpinar, S
dc.contributor.authorAltsybeev, I
dc.contributor.authorAlves Garcia Prado, C
dc.contributor.authorAndrei, C
dc.contributor.authorAndronic, A
dc.contributor.authorAnguelov, V
dc.contributor.authorAnielski, J
dc.contributor.authorAntičić, T
dc.contributor.authorAntinori, F
dc.date.accessioned2021-10-08T07:11:29Z
dc.date.available2021-10-08T07:11:29Z
dc.date.issued2015
dc.description.abstractWe report measurements of the primary charged particle pseudorapidity density and transverse momentum distributions in p–Pb collisions at √sNN = 5.02 TeV, and investigate their correlation with experimental observables sensitive to the centrality of the collision. Centrality classes are defined using different event activity estimators, i.e. charged particle multiplicities measured in three different pseudorapidity regions as well as the energy measured at beam rapidity (zero-degree). The procedures to determine the centrality, quantified by the number of participants (Npart), or the number of nucleon-nucleon binary collisions (Ncoll), are described. We show that, in contrast to Pb–Pb collisions, in p–Pb collisions large multiplicity fluctuations together with the small range of participants available, generate a dynamical bias in centrality classes based on particle multiplicity. We propose to use the zero-degree energy, which we expect not to introduce a dynamical bias, as an alternative event-centrality estimator. Based on zero-degree energy centrality classes, the Npart dependence of particle production is studied. Under the assumption that the multiplicity measured in the Pb-going rapidity region scales with the number of Pb-participants, an approximate independence of the multiplicity per participating nucleon measured at midrapitity of the number of participating nucleons is observed. Furthermore, at high-pT the p–Pb spectra are found to be consistent with the pp spectra scaled by Ncoll for all centrality classes. Our results represent valuable input for the study of the event activity dependence of hard probes in p–Pb collision and, hence, help to establish baselines for the interpretation of the Pb–Pb data.
dc.identifier.apacitationAdam, J., Adamová, D., Aggarwal, M. M., Aglieri Rinella, G., Agnello, M., Agostinelli, A., ... Antinori, F. (2015). Centrality dependence of particle production in p–Pb collisions at √sNN= 5.02 TeV. <i>Physical Review C - Nuclear Physics</i>, 91(6), 174 - 177. http://hdl.handle.net/11427/34621en_ZA
dc.identifier.chicagocitationAdam, J, D Adamová, M M Aggarwal, G Aglieri Rinella, M Agnello, A Agostinelli, N Agrawal, et al "Centrality dependence of particle production in p–Pb collisions at √sNN= 5.02 TeV." <i>Physical Review C - Nuclear Physics</i> 91, 6. (2015): 174 - 177. http://hdl.handle.net/11427/34621en_ZA
dc.identifier.citationAdam, J., Adamová, D., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agostinelli, A., Agrawal, N. & Ahammed, Z. et al. 2015. Centrality dependence of particle production in p–Pb collisions at √sNN= 5.02 TeV. <i>Physical Review C - Nuclear Physics.</i> 91(6):174 - 177. http://hdl.handle.net/11427/34621en_ZA
dc.identifier.issn0556-2813
dc.identifier.issn1089-490X
dc.identifier.ris TY - Journal Article AU - Adam, J AU - Adamová, D AU - Aggarwal, M M AU - Aglieri Rinella, G AU - Agnello, M AU - Agostinelli, A AU - Agrawal, N AU - Ahammed, Z AU - Ahmed, I AU - Ahn, S U AU - Aimo, I AU - Aiola, S AU - Ajaz, M AU - Akindinov, A AU - Alam, S N AU - Aleksandrov, D AU - Alessandro, B AU - Alexandre, D AU - Alfaro Molina, R AU - Alici, A AU - Alkin, A AU - Alme, J AU - Alt, T AU - Altinpinar, S AU - Altsybeev, I AU - Alves Garcia Prado, C AU - Andrei, C AU - Andronic, A AU - Anguelov, V AU - Anielski, J AU - Antičić, T AU - Antinori, F AB - We report measurements of the primary charged particle pseudorapidity density and transverse momentum distributions in p–Pb collisions at √sNN = 5.02 TeV, and investigate their correlation with experimental observables sensitive to the centrality of the collision. Centrality classes are defined using different event activity estimators, i.e. charged particle multiplicities measured in three different pseudorapidity regions as well as the energy measured at beam rapidity (zero-degree). The procedures to determine the centrality, quantified by the number of participants (Npart), or the number of nucleon-nucleon binary collisions (Ncoll), are described. We show that, in contrast to Pb–Pb collisions, in p–Pb collisions large multiplicity fluctuations together with the small range of participants available, generate a dynamical bias in centrality classes based on particle multiplicity. We propose to use the zero-degree energy, which we expect not to introduce a dynamical bias, as an alternative event-centrality estimator. Based on zero-degree energy centrality classes, the Npart dependence of particle production is studied. Under the assumption that the multiplicity measured in the Pb-going rapidity region scales with the number of Pb-participants, an approximate independence of the multiplicity per participating nucleon measured at midrapitity of the number of participating nucleons is observed. Furthermore, at high-pT the p–Pb spectra are found to be consistent with the pp spectra scaled by Ncoll for all centrality classes. Our results represent valuable input for the study of the event activity dependence of hard probes in p–Pb collision and, hence, help to establish baselines for the interpretation of the Pb–Pb data. DA - 2015 DB - OpenUCT DP - University of Cape Town IS - 6 J1 - Physical Review C - Nuclear Physics LK - https://open.uct.ac.za PY - 2015 SM - 0556-2813 SM - 1089-490X T1 - Centrality dependence of particle production in p–Pb collisions at √sNN= 5.02 TeV TI - Centrality dependence of particle production in p–Pb collisions at √sNN= 5.02 TeV UR - http://hdl.handle.net/11427/34621 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34621
dc.identifier.vancouvercitationAdam J, Adamová D, Aggarwal MM, Aglieri Rinella G, Agnello M, Agostinelli A, et al. Centrality dependence of particle production in p–Pb collisions at √sNN= 5.02 TeV. Physical Review C - Nuclear Physics. 2015;91(6):174 - 177. http://hdl.handle.net/11427/34621.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Physics
dc.publisher.facultyFaculty of Science
dc.sourcePhysical Review C - Nuclear Physics
dc.source.journalissue6
dc.source.journalvolume91
dc.source.pagination174 - 177
dc.source.urihttps://dx.doi.org/10.1103/PhysRevC.91.064905
dc.subject.otherTransverse-Momentum Distributions
dc.subject.otherRange Angular-Correlations
dc.subject.otherHigh-Energy
dc.subject.otherProton-Nucleus
dc.subject.otherMultiplicity Dependence
dc.subject.otherRoot-S-Nn=5.02 Tev
dc.subject.otherEvent Generator
dc.subject.otherCross-Sections
dc.subject.otherLhc
dc.subject.otherHadrons
dc.titleCentrality dependence of particle production in p–Pb collisions at √sNN= 5.02 TeV
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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