Production of e+e-pairs accompanied by nuclear dissociation in ultraperipheral heavy-ion collisions

STAR Collaboration

doi:10.1103/PhysRevC.70.031902

Production of e⁺e^-pairs accompanied by nuclear dissociation in ultraperipheral heavy-ion collisions

STAR Collaboration

Physics and Astronomy

University of Birmingham
Panjab University
Variable Energy Cyclotron Centre India
Kent State University
Joint Institute for Nuclear Research
National Institute for Subatomic Physics
Indiana University Bloomington
Purdue University
Institut de Recherches Subatomiques
Ohio State University
Wayne State University
Goethe University Frankfurt
Yale University
University of Rajasthan
University of Washington
Brookhaven National Laboratory
Rice University
SUBATECH
Moscow Engineering Physics Institute
Czech Academy of Sciences
Argonne National Laboratory
Chinese Academy of Sciences
Lawrence Berkeley National Laboratory
University of California at Davis
Warsaw University of Technology
University of Science and Technology of China
University of California at Los Angeles
Tsinghua University
Creighton University
University of California at Berkeley

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

132 Scopus citations

Abstract

We present data on e⁺e^-pair production accompanied by nuclear breakup in ultraperipheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair. The nuclear breakup requirement selects events at small impact parameters, where higher-order diagrams for pair production should be enhanced. We compare the data with two calculations: one based on the equivalent photon approximation, and the other using lowest-order quantum electrodynamics (QED). The data distributions agree with both calculations, except that the pair transverse momentum spectrum disagrees with the equivalent photon approach. We set limits on higher-order contributions to the cross section.

Original language	English
Article number	031902
Pages (from-to)	319021-319026
Number of pages	6
Journal	Physical Review C - Nuclear Physics
Volume	70
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.70.031902
State	Published - Sep 1 2004

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10.1103/PhysRevC.70.031902

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@article{ee2e5f4b624d4ac2a97f81c80227b236,

title = "Production of e+e-pairs accompanied by nuclear dissociation in ultraperipheral heavy-ion collisions",

abstract = "We present data on e+e-pair production accompanied by nuclear breakup in ultraperipheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair. The nuclear breakup requirement selects events at small impact parameters, where higher-order diagrams for pair production should be enhanced. We compare the data with two calculations: one based on the equivalent photon approximation, and the other using lowest-order quantum electrodynamics (QED). The data distributions agree with both calculations, except that the pair transverse momentum spectrum disagrees with the equivalent photon approach. We set limits on higher-order contributions to the cross section.",

author = "\{STAR Collaboration\} and J. Adams and Aggarwal, \{M. M.\} and Z. Ahammed and J. Amonett and Anderson, \{B. D.\} and D. Arkhipkin and Averichev, \{G. S.\} and Y. Bai and J. Balewski and O. Barannikova and Barnby, \{L. S.\} and J. Baudot and S. Bekele and Belaga, \{V. V.\} and R. Bellwied and J. Berger and Bezverkhny, \{B. I.\} and S. Bharadwaj and Bhatia, \{V. S.\} and H. Bichsel and A. Billmeier and Bland, \{L. C.\} and Blyth, \{C. O.\} and Bonner, \{B. E.\} and M. Botje and A. Boucham and A. Brandin and A. Bravar and M. Bystersky and Cadman, \{R. V.\} and Cai, \{X. Z.\} and H. Caines and \{Calder{\'o}n De La Barca S{\'a}nchez\}, M. and J. Carroll and J. Castillo and D. Cebra and Z. Chajecki and P. Chaloupka and S. Chattopdhyay and Chen, \{H. F.\} and Y. Chen and J. Cheng and M. Cherney and A. Chikanian and W. Christie and Coffin, \{J. P.\} and Cormier, \{T. M.\} and Cramer, \{J. G.\} and Crawford, \{H. J.\} and J. Kiryluk",

note = "Publisher Copyright: {\textcopyright} 2004 The American Physical Society.",

year = "2004",

month = sep,

day = "1",

doi = "10.1103/PhysRevC.70.031902",

language = "English",

volume = "70",

pages = "319021--319026",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

number = "3",

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TY - JOUR

T1 - Production of e+e-pairs accompanied by nuclear dissociation in ultraperipheral heavy-ion collisions

AU - STAR Collaboration

AU - Adams, J.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Amonett, J.

AU - Anderson, B. D.

AU - Arkhipkin, D.

AU - Averichev, G. S.

AU - Bai, Y.

AU - Balewski, J.

AU - Barannikova, O.

AU - Barnby, L. S.

AU - Baudot, J.

AU - Bekele, S.

AU - Belaga, V. V.

AU - Bellwied, R.

AU - Berger, J.

AU - Bezverkhny, B. I.

AU - Bharadwaj, S.

AU - Bhatia, V. S.

AU - Bichsel, H.

AU - Billmeier, A.

AU - Bland, L. C.

AU - Blyth, C. O.

AU - Bonner, B. E.

AU - Botje, M.

AU - Boucham, A.

AU - Brandin, A.

AU - Bravar, A.

AU - Bystersky, M.

AU - Cadman, R. V.

AU - Cai, X. Z.

AU - Caines, H.

AU - Calderón De La Barca Sánchez, M.

AU - Carroll, J.

AU - Castillo, J.

AU - Cebra, D.

AU - Chajecki, Z.

AU - Chaloupka, P.

AU - Chattopdhyay, S.

AU - Chen, H. F.

AU - Chen, Y.

AU - Cheng, J.

AU - Cherney, M.

AU - Chikanian, A.

AU - Christie, W.

AU - Coffin, J. P.

AU - Cormier, T. M.

AU - Cramer, J. G.

AU - Crawford, H. J.

AU - Kiryluk, J.

PY - 2004/9/1

Y1 - 2004/9/1

N2 - We present data on e+e-pair production accompanied by nuclear breakup in ultraperipheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair. The nuclear breakup requirement selects events at small impact parameters, where higher-order diagrams for pair production should be enhanced. We compare the data with two calculations: one based on the equivalent photon approximation, and the other using lowest-order quantum electrodynamics (QED). The data distributions agree with both calculations, except that the pair transverse momentum spectrum disagrees with the equivalent photon approach. We set limits on higher-order contributions to the cross section.

AB - We present data on e+e-pair production accompanied by nuclear breakup in ultraperipheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair. The nuclear breakup requirement selects events at small impact parameters, where higher-order diagrams for pair production should be enhanced. We compare the data with two calculations: one based on the equivalent photon approximation, and the other using lowest-order quantum electrodynamics (QED). The data distributions agree with both calculations, except that the pair transverse momentum spectrum disagrees with the equivalent photon approach. We set limits on higher-order contributions to the cross section.

UR - https://www.scopus.com/pages/publications/20844452372

U2 - 10.1103/PhysRevC.70.031902

DO - 10.1103/PhysRevC.70.031902

M3 - Article

AN - SCOPUS:20844452372

SN - 0556-2813

VL - 70

SP - 319021

EP - 319026

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 3

M1 - 031902

ER -

Production of e⁺e^-pairs accompanied by nuclear dissociation in ultraperipheral heavy-ion collisions

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