Proton emission in ultraperipheral Pb-Pb collisions at sNN =5.02 TeV

ALICE Collaboration

doi:10.1103/PhysRevC.111.054906

Proton emission in ultraperipheral Pb-Pb collisions at sNN =5.02 TeV

ALICE Collaboration

Sección de Física

Université Clermont Auvergne
Variable Energy Cyclotron Centre
CERN
National Institute for Nuclear Physics
Aligarh Muslim University
Korea Institute of Science and Technology Information
Pavol Jozef Šafárik University
Goethe University Frankfurt
GSI Helmholtz Centre for Heavy Ion Research
Central China Normal University
Universidad Nacional Autónoma de México
University of Houston
Sungkyunkwan University
University of Bergen
Technical University of Munich
Benemerita Universidad Autonoma de Puebla
Horia Hulubei National Institute of Physics and Nuclear Engineering
University of Derby
University of Münster
Heidelberg University
Lawrence Berkeley National Laboratory
Nantes Université
Université Grenoble Alpes
Universidade de São Paulo
University of Oslo
Yale University
The University of Tokyo
Gangneung-Wonju National University
University of Science and Technology of China
Indian Institute of Technology Indore
University of Jammu
Université Paris-Saclay
AGH University of Krakow
National and Kapodistrian University of Athens
Gauhati University
Wigner Research Centre for Physics
University of Liverpool
Lund University
Indian Institute of Technology Bombay
University of Copenhagen
Université de Strasbourg
Universidad Autonoma de Sinaloa
Institute for Space Sciences
Faculty of Nuclear Sciences and Physical Engineering
Czech Academy of Sciences
University of Kansas
Bose Institute
University of Texas at Austin
Oak Ridge National Laboratory
Pusan National University
University of Brescia
Polytechnic University of Bari
Sofia University
STFC Daresbury Laboratory
Austrian Academy of Sciences
National Research Foundation
University of the Witwatersrand
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Pontificia Universidad Católica del Perú
National University of Science and Technology POLITEHNICA Bucharest
Université de Lyon
Warsaw University of Technology
Fudan University
Max Planck Institute for Physics (Werner Heisenberg Institute)
Inha University
Homi Bhabha National Institute
National Institute for Subatomic Physics
University of Tsukuba
Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile
University of Birmingham
University of Eastern Piedmont
Universidade Federal do ABC
University of Pavia
University of California at Berkeley
University of Foggia
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
Comenius University
Hiroshima University
Polytechnic University of Turin
Saga University
Chicago State University
Universidade Federal do Rio Grande do Sul
University of Tennessee, Knoxville
Nagasaki Institute of Applied Science
Wayne State University
University of Split
Utrecht University
A. Alikhanian Yerevan Institute of Physics
Universidade Estadual de Campinas
Yonsei University
University of Jyväskylä
University of Bonn
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Ohio State University
Technical University of Kosice
National Research and Innovation Agency Republic of Indonesia
China National Nuclear Corporation
Suranaree University of Technology
Slovak Academy of Sciences
Yildiz Technical University
University of Zagreb
Jeonbuk National University
Sejong University
California Polytechnic State University, San Luis Obispo
Panjab University
National Centre for Nuclear Research
University of Catania
University of South-Eastern Norway
University of Messina
University of Helsinki
University of Cape Town
Chungbuk National University
China University of Geosciences, Wuhan
Creighton University
University of Wrocław
National Nuclear Research Center
University of Tübingen
Nara Women's University
NASU - Bogolyubov Institute for Theoretical Physics

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Abstract

The first measurements of proton emission accompanied by neutron emission in the electromagnetic dissociation (EMD) of Pb208 nuclei in the ALICE experiment at the Large Hadron Collider are presented. The EMD protons and neutrons emitted at very forward rapidities are detected by the proton and neutron zero degree calorimeters of the ALICE experiment. The emission cross sections of zero, one, two, and three protons accompanied by at least one neutron were measured in ultraperipheral Pb208-Pb208 collisions at a center-of-mass energy per nucleon pair sNN=5.02TeV. The 0p and 3p cross sections are described by the RELDIS model within their measurement uncertainties, while the 1p and 2p cross sections are underestimated by the model by 17-25%. According to this model, these 0p, 1p, 2p, and 3p cross sections are associated, respectively, with the production of various isotopes of Pb, Tl, Hg, and Au in the EMD of Pb208. The cross sections of the emission of a single proton accompanied by the emission of one, two, or three neutrons in EMD were also measured. The data are significantly overestimated by the RELDIS model, which predicts that the (1p,1n), (1p,2n), and (1p,3n) cross sections are very similar to the cross sections for the production of the thallium isotopes Tl206,205,204.

Original language	English
Article number	054906
Journal	Physical Review C
Volume	111
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.111.054906
State	Published - May 2025

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10.1103/PhysRevC.111.054906

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@article{b5a020225637419f9c4bfa504aae1766,

title = "Proton emission in ultraperipheral Pb-Pb collisions at sNN =5.02 TeV",

abstract = "The first measurements of proton emission accompanied by neutron emission in the electromagnetic dissociation (EMD) of Pb208 nuclei in the ALICE experiment at the Large Hadron Collider are presented. The EMD protons and neutrons emitted at very forward rapidities are detected by the proton and neutron zero degree calorimeters of the ALICE experiment. The emission cross sections of zero, one, two, and three protons accompanied by at least one neutron were measured in ultraperipheral Pb208-Pb208 collisions at a center-of-mass energy per nucleon pair sNN=5.02TeV. The 0p and 3p cross sections are described by the RELDIS model within their measurement uncertainties, while the 1p and 2p cross sections are underestimated by the model by 17-25\%. According to this model, these 0p, 1p, 2p, and 3p cross sections are associated, respectively, with the production of various isotopes of Pb, Tl, Hg, and Au in the EMD of Pb208. The cross sections of the emission of a single proton accompanied by the emission of one, two, or three neutrons in EMD were also measured. The data are significantly overestimated by the RELDIS model, which predicts that the (1p,1n), (1p,2n), and (1p,3n) cross sections are very similar to the cross sections for the production of the thallium isotopes Tl206,205,204.",

author = "\{ALICE Collaboration\} and S. Acharya and A. Agarwal and \{Aglieri Rinella\}, G. and L. Aglietta and M. Agnello and N. Agrawal and Z. Ahammed and S. Ahmad and Ahn, \{S. U.\} and I. Ahuja and A. Akindinov and V. Akishina and M. Al-Turany and D. Aleksandrov and B. Alessandro and Alfanda, \{H. M.\} and \{Alfaro Molina\}, R. and B. Ali and A. Alici and N. Alizadehvandchali and A. Alkin and J. Alme and G. Alocco and T. Alt and Altamura, \{A. R.\} and I. Altsybeev and Alvarado, \{J. R.\} and Alvarez, \{C. O.R.\} and Anaam, \{M. N.\} and C. Andrei and N. Andreou and A. Andronic and E. Andronov and V. Anguelov and F. Antinori and P. Antonioli and N. Apadula and L. Aphecetche and H. Appelsh{\"a}user and C. Arata and S. Arcelli and R. Arnaldi and Arneiro, \{J. G.M.C.A.\} and Arsene, \{I. C.\} and M. Arslandok and A. Augustinus and R. Averbeck and D. Averyanov and \{Bazo Alba\}, \{J. L.\} and Gago, \{A. M.\}",

note = "Publisher Copyright: {\textcopyright} 2025 CERN.",

year = "2025",

month = may,

doi = "10.1103/PhysRevC.111.054906",

language = "English",

volume = "111",

journal = "Physical Review C",

issn = "2469-9985",

number = "5",

}

TY - JOUR

T1 - Proton emission in ultraperipheral Pb-Pb collisions at sNN =5.02 TeV

AU - ALICE Collaboration

AU - Acharya, S.

AU - Agarwal, A.

AU - Aglieri Rinella, G.

AU - Aglietta, L.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, S.

AU - Ahn, S. U.

AU - Ahuja, I.

AU - Akindinov, A.

AU - Akishina, V.

AU - Al-Turany, M.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfanda, H. M.

AU - Alfaro Molina, R.

AU - Ali, B.

AU - Alici, A.

AU - Alizadehvandchali, N.

AU - Alkin, A.

AU - Alme, J.

AU - Alocco, G.

AU - Alt, T.

AU - Altamura, A. R.

AU - Altsybeev, I.

AU - Alvarado, J. R.

AU - Alvarez, C. O.R.

AU - Anaam, M. N.

AU - Andrei, C.

AU - Andreou, N.

AU - Andronic, A.

AU - Andronov, E.

AU - Anguelov, V.

AU - Antinori, F.

AU - Antonioli, P.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arata, C.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arneiro, J. G.M.C.A.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Averyanov, D.

AU - Bazo Alba, J. L.

AU - Gago, A. M.

PY - 2025/5

Y1 - 2025/5

N2 - The first measurements of proton emission accompanied by neutron emission in the electromagnetic dissociation (EMD) of Pb208 nuclei in the ALICE experiment at the Large Hadron Collider are presented. The EMD protons and neutrons emitted at very forward rapidities are detected by the proton and neutron zero degree calorimeters of the ALICE experiment. The emission cross sections of zero, one, two, and three protons accompanied by at least one neutron were measured in ultraperipheral Pb208-Pb208 collisions at a center-of-mass energy per nucleon pair sNN=5.02TeV. The 0p and 3p cross sections are described by the RELDIS model within their measurement uncertainties, while the 1p and 2p cross sections are underestimated by the model by 17-25%. According to this model, these 0p, 1p, 2p, and 3p cross sections are associated, respectively, with the production of various isotopes of Pb, Tl, Hg, and Au in the EMD of Pb208. The cross sections of the emission of a single proton accompanied by the emission of one, two, or three neutrons in EMD were also measured. The data are significantly overestimated by the RELDIS model, which predicts that the (1p,1n), (1p,2n), and (1p,3n) cross sections are very similar to the cross sections for the production of the thallium isotopes Tl206,205,204.

AB - The first measurements of proton emission accompanied by neutron emission in the electromagnetic dissociation (EMD) of Pb208 nuclei in the ALICE experiment at the Large Hadron Collider are presented. The EMD protons and neutrons emitted at very forward rapidities are detected by the proton and neutron zero degree calorimeters of the ALICE experiment. The emission cross sections of zero, one, two, and three protons accompanied by at least one neutron were measured in ultraperipheral Pb208-Pb208 collisions at a center-of-mass energy per nucleon pair sNN=5.02TeV. The 0p and 3p cross sections are described by the RELDIS model within their measurement uncertainties, while the 1p and 2p cross sections are underestimated by the model by 17-25%. According to this model, these 0p, 1p, 2p, and 3p cross sections are associated, respectively, with the production of various isotopes of Pb, Tl, Hg, and Au in the EMD of Pb208. The cross sections of the emission of a single proton accompanied by the emission of one, two, or three neutrons in EMD were also measured. The data are significantly overestimated by the RELDIS model, which predicts that the (1p,1n), (1p,2n), and (1p,3n) cross sections are very similar to the cross sections for the production of the thallium isotopes Tl206,205,204.

UR - https://www.scopus.com/pages/publications/105005143987

U2 - 10.1103/PhysRevC.111.054906

DO - 10.1103/PhysRevC.111.054906

M3 - Article

AN - SCOPUS:105005143987

SN - 2469-9985

VL - 111

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - 054906

ER -

Proton emission in ultraperipheral Pb-Pb collisions at sNN =5.02 TeV

Abstract

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