Production of light nuclei and anti-nuclei in pp and Pb-Pb collisions at energies available at the CERN Large Hadron Collider

ALICE Collaboration

doi:10.1103/PhysRevC.93.024917

Production of light nuclei and anti-nuclei in pp and Pb-Pb collisions at energies available at the CERN Large Hadron Collider

ALICE Collaboration

Chair of Experimentalphysik - Dense and Strange Hadronic Matter

Czech Technical University in Prague
Nuclear Physics Institute of the Cas
Panjab University
European Organization for Nuclear Research
INFN Sez. di Torino
The Indian Institute of Technology Bombay
VECC Kolkata
COMSATS University Islamabad
Korea Institute of Science and Technology Information
Politecnico di Torino
Yale University
ITEP
National Research Centre "Kurchatov Institute"
University of Birmingham
Universidad Nacional Autónoma de México
Centro Fermi
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
Bogolyubov Institute for Theoretical Physics Nasu
Bergen University College
Frankfurt Institute for Advanced Studies
University of Bergen
University of St. Petersburg
University of São Paulo
Horia Hulubei National Institute of Physics and Nuclear Engineering
GSI Helmholtz Center
Heidelberg University
University of Münster
Rudjer Boskovic Institute
Dipartimento di Fisica 'G. Galilei' and INFN
l'institut du thorax
Johann Wolfgang Goethe University
DIBINEM, Alma Mater Studiorum, University of Bologna
Universidad de Santiago de Compostela
University of Oslo
Aligarh Muslim University
Laboratori Nazionali Del Sud
Gangneung-Wonju National University
Cluster of Excellence E-conversion
University of Jammu
Commissariat A l'Énergie Atomique et Aux Énergies Alternatives, Centre de Saclay, IRFU
Technical University of Munich
Institute of Physics Bhubaneswar
Università di Catania
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
Hungarian Academy of Sciences
LAIC, Université d'Auvergne
Central China Normal University
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
Joint Inst. for Nuclear Research
Niels Bohr Institutet
Indian Institute of Technology Indore
Universite de Strasbourg
Benemerita Universidad Autonoma de Puebla
University of Houston
Wayne State University
National Research Nuclear University MEPhI
Petersburg Nuclear Phys. Inst.
the University of Utrecht
Gauhati University
Tsukuba University
INFN, Laboratori Nazionali Di Frascati
National Institute of Science Education and Research
CIEMAT Energy Department
Lawrence Berkeley National Laboratory
P. J. Safarik University
Pusan National University
STFC Daresbury Laboratory
National Research Foundation
Science Park 105
Purdue University
University of Helsinki and Helsinki Institute of Physics
Russian Federal Nuclear Center (VNIIEF)
Ohio State University
Pontifical Catholic University of Peru San Miguel
INFN- Sezione di Trieste
University of Tennessee
University of Cagliari
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
University of Jyväskylä
University of Liverpool
Saha Institute of Nuclear Physics
Creighton University
Université Claude Bernard Lyon 1
University of Campinas
Lund University
Sezione INFN di Cagliari
University of Cape Town
University of Grenoble Alpes
University Paris-Sud
CINVESTAV
Oak Ridge National Laboratory
Sezione INFN di Roma La Sapienza
Instituto de Ciencias Nucleares de la UNAM
Institute of Space Sciences
Bose Institute
National Center for Nuclear Research (NCBJ)
University of Kansas
University of Zagreb
Institute for High Energy Physics (IHEP)
Institute for Nuclear Research of the Russian Academy of Sciences
University of Athens
Chicago State University
University of Split
Warsaw Institute of Technology
A.I. Alikhanyan National Science Laboratory (YerPhi)
University of Tokyo
University of Tübingen
Sejong University
Institute of Experimental Physics Slovak Academy of Sciences
Yonsei University
KTO Karatay University
Fachhochschule Worms
California Polytechnic State University, San Luis Obispo
University of Texas at Austin
Suranaree University of Technology
Inha University
University of South-Eastern Norway
Universidad Autonoma de Sinaloa
China Institute of Atomic Energy
Moscow State University
Institute of Physics of the Czech Academy of Sciences
Comenius University
Politecnico di Bari
Konkuk University
Hiroshima University
Budker Institute of Nuclear Physics (SB RAS)
University of Rajasthan
Laboratori Nazionali di Legnaro
Lawrence Livermore National Laboratory
CNRS/IN2P3 and Université Paris 11
University of the Witwatersrand, Johannesburg

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

239 Scopus citations

Abstract

The production of (anti-)deuteron and (anti-)He3 nuclei in Pb-Pb collisions at sNN=2.76 TeV has been studied using the ALICE detector at the LHC. The spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits of several particles support the interpretation that this behavior is caused by an increase of radial flow. The integrated particle yields are discussed in the context of coalescence and thermal-statistical model expectations. The particle ratios, He3/d and He3/p, in Pb-Pb collisions are found to be in agreement with a common chemical freeze-out temperature of Tchem≈156 MeV. These ratios do not vary with centrality which is in agreement with the thermal-statistical model. In a coalescence approach, it excludes models in which nucleus production is proportional to the particle multiplicity and favors those in which it is proportional to the particle density instead. In addition, the observation of 31 anti-tritons in Pb-Pb collisions is reported. For comparison, the deuteron spectrum in pp collisions at s=7 TeV is also presented. While the p/π ratio is similar in pp and Pb-Pb collisions, the d/p ratio in pp collisions is found to be lower by a factor of 2.2 than in Pb-Pb collisions.

Original language	English
Article number	024917
Journal	Physical Review C
Volume	93
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.93.024917
State	Published - 29 Feb 2016

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@article{26ecdd97ccdb45baa1b729bf9e288ec9,

title = "Production of light nuclei and anti-nuclei in pp and Pb-Pb collisions at energies available at the CERN Large Hadron Collider",

abstract = "The production of (anti-)deuteron and (anti-)He3 nuclei in Pb-Pb collisions at sNN=2.76 TeV has been studied using the ALICE detector at the LHC. The spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits of several particles support the interpretation that this behavior is caused by an increase of radial flow. The integrated particle yields are discussed in the context of coalescence and thermal-statistical model expectations. The particle ratios, He3/d and He3/p, in Pb-Pb collisions are found to be in agreement with a common chemical freeze-out temperature of Tchem≈156 MeV. These ratios do not vary with centrality which is in agreement with the thermal-statistical model. In a coalescence approach, it excludes models in which nucleus production is proportional to the particle multiplicity and favors those in which it is proportional to the particle density instead. In addition, the observation of 31 anti-tritons in Pb-Pb collisions is reported. For comparison, the deuteron spectrum in pp collisions at s=7 TeV is also presented. While the p/π ratio is similar in pp and Pb-Pb collisions, the d/p ratio in pp collisions is found to be lower by a factor of 2.2 than in Pb-Pb collisions.",

author = "\{ALICE Collaboration\} and J. Adam and D. Adamov{\'a} and Aggarwal, \{M. M.\} and \{Aglieri Rinella\}, G. and M. Agnello and N. Agrawal and Z. Ahammed and I. Ahmed and Ahn, \{S. U.\} and I. Aimo and S. Aiola and M. Ajaz and A. Akindinov and Alam, \{S. N.\} and D. Aleksandrov and B. Alessandro and D. Alexandre and \{Alfaro Molina\}, R. and A. Alici and A. Alkin and J. Alme and T. Alt and S. Altinpinar and I. Altsybeev and \{Alves Garcia Prado\}, C. and C. Andrei and A. Andronic and V. Anguelov and J. Anielski and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and N. Armesto and R. Arnaldi and T. Aronsson and Arsene, \{I. C.\} and M. Arslandok and A. Augustinus and R. Averbeck and Azmi, \{M. D.\} and M. Bach and A. Badal{\`a} and Baek, \{Y. W.\} and S. Bagnasco and R. Bailhache and L. Fabbietti and Zimmermann, \{M. B.\}",

note = "Publisher Copyright: {\textcopyright} 2016 CERN.",

year = "2016",

month = feb,

day = "29",

doi = "10.1103/PhysRevC.93.024917",

language = "English",

volume = "93",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2",

}

TY - JOUR

T1 - Production of light nuclei and anti-nuclei in pp and Pb-Pb collisions at energies available at the CERN Large Hadron Collider

AU - ALICE Collaboration

AU - Adam, J.

AU - Adamová, D.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

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.

AU - Antonioli, P.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Armesto, N.

AU - Arnaldi, R.

AU - Aronsson, T.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Bach, M.

AU - Badalà, A.

AU - Baek, Y. W.

AU - Bagnasco, S.

AU - Bailhache, R.

AU - Fabbietti, L.

AU - Zimmermann, M. B.

PY - 2016/2/29

Y1 - 2016/2/29

N2 - The production of (anti-)deuteron and (anti-)He3 nuclei in Pb-Pb collisions at sNN=2.76 TeV has been studied using the ALICE detector at the LHC. The spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits of several particles support the interpretation that this behavior is caused by an increase of radial flow. The integrated particle yields are discussed in the context of coalescence and thermal-statistical model expectations. The particle ratios, He3/d and He3/p, in Pb-Pb collisions are found to be in agreement with a common chemical freeze-out temperature of Tchem≈156 MeV. These ratios do not vary with centrality which is in agreement with the thermal-statistical model. In a coalescence approach, it excludes models in which nucleus production is proportional to the particle multiplicity and favors those in which it is proportional to the particle density instead. In addition, the observation of 31 anti-tritons in Pb-Pb collisions is reported. For comparison, the deuteron spectrum in pp collisions at s=7 TeV is also presented. While the p/π ratio is similar in pp and Pb-Pb collisions, the d/p ratio in pp collisions is found to be lower by a factor of 2.2 than in Pb-Pb collisions.

AB - The production of (anti-)deuteron and (anti-)He3 nuclei in Pb-Pb collisions at sNN=2.76 TeV has been studied using the ALICE detector at the LHC. The spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits of several particles support the interpretation that this behavior is caused by an increase of radial flow. The integrated particle yields are discussed in the context of coalescence and thermal-statistical model expectations. The particle ratios, He3/d and He3/p, in Pb-Pb collisions are found to be in agreement with a common chemical freeze-out temperature of Tchem≈156 MeV. These ratios do not vary with centrality which is in agreement with the thermal-statistical model. In a coalescence approach, it excludes models in which nucleus production is proportional to the particle multiplicity and favors those in which it is proportional to the particle density instead. In addition, the observation of 31 anti-tritons in Pb-Pb collisions is reported. For comparison, the deuteron spectrum in pp collisions at s=7 TeV is also presented. While the p/π ratio is similar in pp and Pb-Pb collisions, the d/p ratio in pp collisions is found to be lower by a factor of 2.2 than in Pb-Pb collisions.

UR - https://www.scopus.com/pages/publications/84960099590

U2 - 10.1103/PhysRevC.93.024917

DO - 10.1103/PhysRevC.93.024917

M3 - Article

AN - SCOPUS:84960099590

SN - 2469-9985

VL - 93

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024917

ER -

Production of light nuclei and anti-nuclei in pp and Pb-Pb collisions at energies available at the CERN Large Hadron Collider

Abstract

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