Event-by-event mean pT fluctuations in pp and Pb–Pb collisions at the LHC

ALICE Collaboration

doi:10.1140/epjc/s10052-014-3077-y

Event-by-event mean pT fluctuations in pp and Pb–Pb collisions at the LHC

ALICE Collaboration

National Agricultural Research Foundation
University of Padova
Agricultural University of Athens
Université Paris-Sud
Utrecht University
A. Alikhanian Yerevan Institute of Physics
Institute for Space Sciences
CERN
Lawrence Livermore National Laboratory
Czech Technical University in Prague
Czech Academy of Sciences
Panjab University
Polytechnic University of Turin
National Institute for Nuclear Physics
National Institute for Subatomic Physics
Aligarh Muslim University
GSI Helmholtzzentrum für Schwerionenforschung
Universidade de São Paulo
Ruder Boskovic Institute
University of Zagreb
University of Jammu
Central China Normal University
CNRS Centre National de la Recherche Scientifique

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Event-by-event fluctuations of the mean transverse momentum of charged particles produced in pp collisions at 0.9, 2.76 and 7 TeV, and Pb–Pb collisions at 2.76 TeV are studied as a function of the charged-particle multiplicity using the ALICE detector at the LHC. Dynamical fluctuations indicative of correlated particle emission are observed in all systems. The results in pp collisions show little dependence on collision energy. The Monte Carlo event generators PYTHIA and PHOJET are in qualitative agreement with the data. Peripheral Pb–Pb data exhibit a similar multiplicity dependence as that observed in pp. In central Pb–Pb, the results deviate from this trend, featuring a significant reduction of the fluctuation strength. The results in Pb–Pb are in qualitative agreement with previous measurements in Au–Au at lower collision energies and with expectations from models that incorporate collective phenomena.

Original language	English
Article number	3077
Number of pages	15
Journal	European physical journal. C, particles and fields
Volume	74
Issue number	10
DOIs	https://doi.org/10.1140/epjc/s10052-014-3077-y
Publication status	Published - 1 Jan 2014

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@article{95a461c746f64925916207a8832985b5,

title = "Event-by-event mean pT fluctuations in pp and Pb–Pb collisions at the LHC",

abstract = "Event-by-event fluctuations of the mean transverse momentum of charged particles produced in pp collisions at 0.9, 2.76 and 7 TeV, and Pb–Pb collisions at 2.76 TeV are studied as a function of the charged-particle multiplicity using the ALICE detector at the LHC. Dynamical fluctuations indicative of correlated particle emission are observed in all systems. The results in pp collisions show little dependence on collision energy. The Monte Carlo event generators PYTHIA and PHOJET are in qualitative agreement with the data. Peripheral Pb–Pb data exhibit a similar multiplicity dependence as that observed in pp. In central Pb–Pb, the results deviate from this trend, featuring a significant reduction of the fluctuation strength. The results in Pb–Pb are in qualitative agreement with previous measurements in Au–Au at lower collision energies and with expectations from models that incorporate collective phenomena.",

author = "\{ALICE Collaboration\}, Collaboration and B. Abelev and J. Adam and D. Adamov{\'a} and Aggarwal, \{M. M.\} and Rinella, \{G. Aglieri\} and M. Agnello and S. Basu and Bertens, \{R. A.\} and C. Bianchin and S. Bjelogrlic and M. Botje and A. Caliva and M. Chojnacki and P. Christakoglou and T. Chujo and \{de Rooij\}, R. and A. Dobrin and A. Dubla and A. Grelli and Keijdener, \{D. L D\} and Khan, \{M. M.\} and M. Krzewicki and Kuijer, \{P. G.\} and \{La Pointe\}, \{S. L.\} and E. Leogrande and Lodato, \{D. F.\} and G. Luparello and A. Mischke and N. Mohammadi and S. Muhuri and G. Nooren and \{Oliveira Da Silva\}, \{A. C.\} and T. Peitzmann and N. Poljak and S. Rajput and M. Reicher and E. Rocco and \{Rodriguez Manso\}, A. and Snellings, \{R. J M\} and D. Thomas and \{Van Der Maarel\}, J. and \{van Leeuwen\}, M. and M. Veldhoen and M. Verweij and M. Wang and H. Yang and X. Zhang and F. Zhou and Y. Zhou and \{ALICE Collaboration\}",

year = "2014",

month = jan,

day = "1",

doi = "10.1140/epjc/s10052-014-3077-y",

language = "English",

volume = "74",

journal = "European physical journal. C, particles and fields",

issn = "1434-6044",

publisher = "Springer Nature",

number = "10",

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TY - JOUR

T1 - Event-by-event mean pT fluctuations in pp and Pb–Pb collisions at the LHC

AU - ALICE Collaboration, Collaboration

AU - Abelev, B.

AU - Adam, J.

AU - Adamová, D.

AU - Aggarwal, M. M.

AU - Rinella, G. Aglieri

AU - Agnello, M.

AU - Basu, S.

AU - Bertens, R. A.

AU - Bianchin, C.

AU - Bjelogrlic, S.

AU - Botje, M.

AU - Caliva, A.

AU - Chojnacki, M.

AU - Christakoglou, P.

AU - Chujo, T.

AU - de Rooij, R.

AU - Dobrin, A.

AU - Dubla, A.

AU - Grelli, A.

AU - Keijdener, D. L D

AU - Khan, M. M.

AU - Krzewicki, M.

AU - Kuijer, P. G.

AU - La Pointe, S. L.

AU - Leogrande, E.

AU - Lodato, D. F.

AU - Luparello, G.

AU - Mischke, A.

AU - Mohammadi, N.

AU - Muhuri, S.

AU - Nooren, G.

AU - Oliveira Da Silva, A. C.

AU - Peitzmann, T.

AU - Poljak, N.

AU - Rajput, S.

AU - Reicher, M.

AU - Rocco, E.

AU - Rodriguez Manso, A.

AU - Snellings, R. J M

AU - Thomas, D.

AU - Van Der Maarel, J.

AU - van Leeuwen, M.

AU - Veldhoen, M.

AU - Verweij, M.

AU - Wang, M.

AU - Yang, H.

AU - Zhang, X.

AU - Zhou, F.

AU - Zhou, Y.

AU - ALICE Collaboration

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Event-by-event fluctuations of the mean transverse momentum of charged particles produced in pp collisions at 0.9, 2.76 and 7 TeV, and Pb–Pb collisions at 2.76 TeV are studied as a function of the charged-particle multiplicity using the ALICE detector at the LHC. Dynamical fluctuations indicative of correlated particle emission are observed in all systems. The results in pp collisions show little dependence on collision energy. The Monte Carlo event generators PYTHIA and PHOJET are in qualitative agreement with the data. Peripheral Pb–Pb data exhibit a similar multiplicity dependence as that observed in pp. In central Pb–Pb, the results deviate from this trend, featuring a significant reduction of the fluctuation strength. The results in Pb–Pb are in qualitative agreement with previous measurements in Au–Au at lower collision energies and with expectations from models that incorporate collective phenomena.

AB - Event-by-event fluctuations of the mean transverse momentum of charged particles produced in pp collisions at 0.9, 2.76 and 7 TeV, and Pb–Pb collisions at 2.76 TeV are studied as a function of the charged-particle multiplicity using the ALICE detector at the LHC. Dynamical fluctuations indicative of correlated particle emission are observed in all systems. The results in pp collisions show little dependence on collision energy. The Monte Carlo event generators PYTHIA and PHOJET are in qualitative agreement with the data. Peripheral Pb–Pb data exhibit a similar multiplicity dependence as that observed in pp. In central Pb–Pb, the results deviate from this trend, featuring a significant reduction of the fluctuation strength. The results in Pb–Pb are in qualitative agreement with previous measurements in Au–Au at lower collision energies and with expectations from models that incorporate collective phenomena.

UR - https://www.scopus.com/pages/publications/84919949089

U2 - 10.1140/epjc/s10052-014-3077-y

DO - 10.1140/epjc/s10052-014-3077-y

M3 - Article

AN - SCOPUS:84919949089

SN - 1434-6044

VL - 74

JO - European physical journal. C, particles and fields

JF - European physical journal. C, particles and fields

IS - 10

M1 - 3077

ER -

Event-by-event mean pT fluctuations in pp and Pb–Pb collisions at the LHC

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