Mean pT scaling with m/nq at the LHC: Absence of (hydro) flow in small systems?

被引：11

作者：

Ortiz Velasquez, Antonio ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico

来源：

NUCLEAR PHYSICS A | 2015年 / 943卷

关键词：

Multi-parton interactions; Color reconnection; Flow-like behavior; Nucleon-nucleon reactions; Nucleon-nucleus collisions; PB-PB COLLISIONS; CHARGED PIONS; MULTIPLICITY DEPENDENCE; NUCLEUS COLLISIONS; PPB COLLISIONS; PROTON-PROTON; LONG-RANGE; KAONS; ROOT-S=0.9;

D O I：

10.1016/j.nuclphysa.2015.08.003

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

In this work, a study of the average transverse momentum (p(T)) as a function of the mid-rapidity charged hadron multiplicity (N-ch) and hadron mass (m) in p-Pb and Pb-Pb collisions at LHC energies is presented. For the events producing low N-ch, the average p(T) is found to scale with the reduced hadron mass, i.e., mass divided by the number of quark constituents (m/n(q)), this scaling also holds for inelastic pp collisions at RHIC and LHC energies. The scaling is broken in high multiplicity p-Pb and Pb-Pb collisions, where, for < dN(ch)/d eta > less than or similar to 60 the average p(T) is higher for baryons than that for mesons, though they increase linearly with m/n(q). This behavior is qualitatively well reproduced by Pythia 8, but not by hydro calculations, where an universal scaling with the hadron mass (and not with m/n(q)) is predicted for all the multiplicity event classes. Only the central (0-60%) Pb-Pb collisions behave as expected from hydro. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：9 / 17

页数：9

共 40 条

[1]

Aamodt K, 2011, EUR PHYS J C, V71, DOI 10.1140/epjc/s10052-011-1655-9

[2]

Aamodt K, 2011, EUR PHYS J C, V71, DOI 10.1140/epjc/s10052-011-1594-5

[3] Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at √sNN=2.76 TeV [J].

Aamodt, K. ;

Quintana, A. Abrahantes ;

Adamova, D. ;

Adare, A. M. ;

Aggarwal, M. M. ;

Rinella, G. Aglieri ;

Agocs, A. G. ;

Salazar, S. Aguilar ;

Ahammed, Z. ;

Ahmad, N. ;

Masoodi, A. Ahmad ;

Ahn, S. U. ;

Akindinov, A. ;

Aleksandrov, D. ;

Alessandro, B. ;

Alfaro Molina, R. ;

Alici, A. ;

Alkin, A. ;

Avina, E. Almaraz ;

Alt, T. ;

Altini, V. ;

Altinpinar, S. ;

Altsybeev, I. ;

Andrei, C. ;

Andronic, A. ;

Anguelov, V. ;

Anson, C. ;

Anticic, T. ;

Antinori, F. ;

Antonioli, P. ;

Aphecetche, L. ;

Appelshaeuser, H. ;

Arbor, N. ;

Arcelli, S. ;

Arend, A. ;

Armesto, N. ;

Arnaldi, R. ;

Aronsson, T. ;

Arsene, I. C. ;

Asryan, A. ;

Augustinus, A. ;

Averbeck, R. ;

Awes, T. C. ;

Aysto, J. ;

Azmi, M. D. ;

Bach, M. ;

Badala, A. ;

Baek, Y. W. ;

Bagnasco, S. ;

Bailhache, R. .

PHYSICAL REVIEW LETTERS, 2011, 106 (03)

[4]

Aamodt K, 2010, EUR PHYS J C, V68, P345, DOI 10.1140/epjc/s10052-010-1350-2

[5]

Abelev B, 2015, EUR PHYS J C, V75, DOI 10.1140/epjc/s10052-014-3191-x

[6] K*(892)0 and φ(1020) production in Pb-Pb collisions at √sNN=2.76 TeV [J].

Abelev, B. ;

Adam, J. ;

Adamova, D. ;

Aggarwal, M. M. ;

Agnello, M. ;

Agostinelli, A. ;

Agrawal, N. ;

Ahammed, Z. ;

Ahmad, N. ;

Masoodi, A. Ahmad ;

Ahmed, I. ;

Ahn, S. U. ;

Ahn, S. A. ;

Aimo, I. ;

Aiola, S. ;

Ajaz, M. ;

Akindinov, A. ;

Aleksandrov, D. ;

Alessandro, B. ;

Alexandre, D. ;

Alici, A. ;

Alkin, A. ;

Alme, J. ;

Alt, T. ;

Altini, V. ;

Altinpinar, S. ;

Altsybeev, I. ;

Prado, C. Alves Garcia ;

Andrei, C. ;

Andronic, A. ;

Anguelov, V. ;

Anielski, J. ;

Anticic, T. ;

Antinori, F. ;

Antonioli, P. ;

Aphecetche, L. ;

Appelshaeuser, H. ;

Arbor, N. ;

Arcelli, S. ;

Armesto, N. ;

Arnaldi, R. ;

Aronsson, T. ;

Arsene, I. C. ;

Arslandok, M. ;

Augustinus, A. ;

Averbeck, R. ;

Awes, T. C. ;

Azmi, M. D. ;

Bach, M. ;

Badala, A. .

PHYSICAL REVIEW C, 2015, 91 (02)

[7] Production of charged pions, kaons and protons at large transverse momenta in pp and Pb-Pb collisions at √sNN=2.76 TeV [J].

Abelev, B. ;

Adam, J. ;

Adamova, D. ;

Aggarwal, M. M. ;

Rinella, G. Aglieri ;

Agnello, M. ;

Agostinelli, A. ;

Agrawal, N. ;

Ahammed, Z. ;

Ahmad, N. ;

Masoodi, A. Ahmad ;

Ahmed, I. ;

Ahn, S. U. ;

Ahn, S. A. ;

Aimo, I. ;

Aiola, S. ;

Ajaz, M. ;

Akindinov, A. ;

Aleksandrov, D. ;

Alessandro, B. ;

Alexandre, D. ;

Alici, A. ;

Alkin, A. ;

Alme, J. ;

Alt, T. ;

Altini, V. ;

Altinpinar, S. ;

Altsybeev, I. ;

Alves Garcia Prado, C. ;

Andrei, C. ;

Andronic, A. ;

Anguelov, V. ;

Anielski, J. ;

Anticic, T. ;

Antinori, F. ;

Antonioli, P. ;

Aphecetche, L. ;

Appelshaeuser, H. ;

Arbor, N. ;

Arcelli, S. ;

Armesto, N. ;

Arnaldi, R. ;

Aronsson, T. ;

Arsene, I. C. ;

Arslandok, M. ;

Augustinus, A. ;

Averbeck, R. ;

Awes, T. C. ;

Azmi, M. D. ;

Bach, M. .

PHYSICS LETTERS B, 2014, 736 :196-207

[8] Multiplicity dependence of pion, kaon, proton and lambda production in p-Pb collisions at √sNN=5.02 TeV [J].

Abelev, B. ;

Adam, J. ;

Adamova, D. ;

Adare, A. M. ;

Aggarwal, M. M. ;

Rinella, G. Aglieri ;

Agnello, M. ;

Agocs, A. G. ;

Agostinelli, A. ;

Ahammed, Y. Z. ;

Ahmad, N. ;

Masoodi, A. Ahmad ;

Ahmed, I. ;

Ahn, S. U. ;

Ahn, S. A. ;

Aimo, I. ;

Aiola, S. ;

Ajaz, M. ;

Akindinov, A. ;

Aleksandrov, D. ;

Alessandro, B. ;

Alexandre, D. ;

Alici, A. ;

Alkin, A. ;

Alme, J. ;

Alt, T. ;

Altini, V. ;

Altinpinar, S. ;

Altsybeev, I. ;

Alves Garcia Prado, C. ;

Andrei, C. ;

Andronic, A. ;

Anguelov, V. ;

Anielski, J. ;

Anticic, T. ;

Antinori, F. ;

Antonioli, P. ;

Aphecetche, L. ;

Appelshaeuser, H. ;

Arbor, N. ;

Arcelli, S. ;

Armesto, N. ;

Arnaldi, R. ;

Aronsson, T. ;

Arsene, I. C. ;

Arslandok, M. ;

Augustinus, A. ;

Averbeck, R. ;

Awes, T. C. ;

Azmi, M. D. .

PHYSICS LETTERS B, 2014, 728 :25-38

[9] Multiplicity dependence of the average transverse momentum in pp, p-Pb, and Pb-Pb collisions at the LHC [J].

Abelev, B. ;

Adam, J. ;

Adamova, D. ;

Adare, A. M. ;

Aggarwal, M. M. ;

Rinella, G. Aglieri ;

Agnello, M. ;

Agocs, A. G. ;

Agostinelli, A. ;

Ahammed, Z. ;

Masoodi, A. Ahmad ;

Ahmad, N. ;

Ahmed, I. ;

Ahn, S. A. ;

Ahn, S. U. ;

Aimo, I. ;

Ajaz, M. ;

Akindinov, A. ;

Aleksandrov, D. ;

Alessandro, B. ;

Alexandre, D. ;

Alici, A. ;

Alkin, A. ;

Alme, J. ;

Alt, T. ;

Altini, V. ;

Altinpinar, S. ;

Altsybeev, I. ;

Andrei, C. ;

Andronic, A. ;

Anguelov, V. ;

Anielski, J. ;

Anson, C. ;

Anticic, T. ;

Antinori, F. ;

Antonioli, P. ;

Aphecetche, L. ;

Appelshaeuser, H. ;

Arbor, N. ;

Arcelli, S. ;

Arend, A. ;

Armesto, N. ;

Arnaldi, R. ;

Aronsson, T. ;

Arsene, I. C. ;

Arslandok, M. ;

Asryan, A. ;

Augustinus, A. ;

Averbeck, R. ;

Awes, T. C. .

PHYSICS LETTERS B, 2013, 727 (4-5) :371-380

[10] KS0 and Λ Production in Pb-Pb Collisions at √sNN=2: 76 TeV [J].

Abelev, B. ;

Adam, J. ;

Adamova, D. ;

Adare, A. M. ;

Aggarwal, M. M. ;

Rinella, G. Aglieri ;

Agnello, M. ;

Agocs, A. G. ;

Agostinelli, A. ;

Ahammed, Z. ;

Ahmad, N. ;

Masoodi, A. Ahmad ;

Ahmed, I. ;

Ahn, S. U. ;

Ahn, S. A. ;

Aimo, I. ;

Aiola, S. ;

Ajaz, M. ;

Akindinov, A. ;

Aleksandrov, D. ;

Alessandro, B. ;

Alexandre, D. ;

Alici, A. ;

Alkin, A. ;

Alme, J. ;

Alt, T. ;

Altini, V. ;

Altinpinar, S. ;

Altsybeev, I. ;

Alves Garcia Prado, C. ;

Andrei, C. ;

Andronic, A. ;

Anguelov, V. ;

Anielski, J. ;

Anticic, T. ;

Antinori, F. ;

Antonioli, P. ;

Aphecetche, L. ;

Appelshaeuser, H. ;

Arbor, N. ;

Arcelli, S. ;

Armesto, N. ;

Arnaldi, R. ;

Aronsson, T. ;

Arsene, I. C. ;

Arslandok, M. ;

Augustinus, A. ;

Averbeck, R. ;

Awes, T. C. ;

Azmi, M. D. .

PHYSICAL REVIEW LETTERS, 2013, 111 (22)

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