Energy dependence of polarized γγ→e+e- in peripheral Au+Au collisions at sNN =54.4 and 200 GeV with the STAR experiment at RHIC

STAR Collaboration

doi:10.1103/PhysRevC.111.014909

Energy dependence of polarized γγ→e+e- in peripheral Au+Au collisions at sNN =54.4 and 200 GeV with the STAR experiment at RHIC

STAR Collaboration

American University in Cairo
Texas A&M University
Czech Technical University in Prague
Ohio State University
Joint Institute for Nuclear Research
Panjab University
Variable Energy Cyclotron Centre India
Alikhanov Institute for Theoretical and Experimental Physics
Moscow Engineering Physics Institute
Indian Institute of Technology Patna
Abilene Christian University
Universidad de Tarapacá
University of Houston
University of California at Riverside
University of Jammu
Stony Brook University
Chinese Academy of Sciences
Yale University
University of California at Davis
Lawrence Berkeley National Laboratory
University of California at Los Angeles
Indiana University Bloomington
National Institute of Technology, Durgapur
Shandong University
Fudan University
Guangxi Normal University
Tsinghua University
Brookhaven National Laboratory
University of California at Berkeley
University of Illinois at Chicago

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

2 Scopus citations

Abstract

We report the differential yields at mid-rapidity of the Breit-Wheeler process (γγ→e+e-) in peripheral Au+Au collisions at sNN=54.4 and 200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC), as a function of energy sNN, e+e- transverse momentum pT, pT2, invariant mass Mee, and azimuthal angle. In the invariant mass range of 0.4<Mee<2.6GeV/c2 at low transverse momentum (pT<0.15GeV/c), the yields increase while the pair (pT2) decreases with increasing sNN, a feature that is correctly predicted by the QED calculation. The energy dependencies of the measured quantities are sensitive to the nuclear form factor, infrared divergence and photon polarization. The data are compiled and used to extract the charge radius of the Au nucleus.

Original language	English
Article number	014909
Journal	Physical Review C
Volume	111
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.111.014909
State	Published - Jan 2025

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title = "Energy dependence of polarized γγ→e+e- in peripheral Au+Au collisions at sNN =54.4 and 200 GeV with the STAR experiment at RHIC",

abstract = "We report the differential yields at mid-rapidity of the Breit-Wheeler process (γγ→e+e-) in peripheral Au+Au collisions at sNN=54.4 and 200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC), as a function of energy sNN, e+e- transverse momentum pT, pT2, invariant mass Mee, and azimuthal angle. In the invariant mass range of 0.4",

author = "\{STAR Collaboration\} and Abdulhamid, \{M. I.\} and Aboona, \{B. E.\} and J. Adam and Adams, \{J. R.\} and G. Agakishiev and I. Aggarwal and Aggarwal, \{M. M.\} and Z. Ahammed and A. Aitbaev and I. Alekseev and E. Alpatov and A. Aparin and S. Aslam and J. Atchison and Averichev, \{G. S.\} and V. Bairathi and Cap, \{J. G.Ball\} and K. Barish and P. Bhagat and A. Bhasin and S. Bhatta and Bordyuzhin, \{I. G.\} and Brandenburg, \{J. D.\} and Brandin, \{A. V.\} and C. Broodo and Cai, \{X. Z.\} and H. Caines and S{\'a}nchez, \{M. Calder{\'o}n De La Barca\} and D. Cebra and J. Ceska and I. Chakaberia and Chan, \{B. K.\} and Z. Chang and A. Chatterjee and D. Chen and J. Chen and Chen, \{J. H.\} and Q. Chen and Z. Chen and J. Cheng and Y. Cheng and W. Christie and X. Chu and Crawford, \{H. J.\} and G. Dale-Gau and A. Das and Dedovich, \{T. G.\} and A. Deshpande and J. Jia and R. Lacey",

note = "Publisher Copyright: {\textcopyright} 2025 American Physical Society.",

year = "2025",

month = jan,

doi = "10.1103/PhysRevC.111.014909",

language = "English",

volume = "111",

journal = "Physical Review C",

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T1 - Energy dependence of polarized γγ→e+e- in peripheral Au+Au collisions at sNN =54.4 and 200 GeV with the STAR experiment at RHIC

AU - STAR Collaboration

AU - Abdulhamid, M. I.

AU - Aboona, B. E.

AU - Adam, J.

AU - Adams, J. R.

AU - Agakishiev, G.

AU - Aggarwal, I.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Aitbaev, A.

AU - Alekseev, I.

AU - Alpatov, E.

AU - Aparin, A.

AU - Aslam, S.

AU - Atchison, J.

AU - Averichev, G. S.

AU - Bairathi, V.

AU - Cap, J. G.Ball

AU - Barish, K.

AU - Bhagat, P.

AU - Bhasin, A.

AU - Bhatta, S.

AU - Bordyuzhin, I. G.

AU - Brandenburg, J. D.

AU - Brandin, A. V.

AU - Broodo, C.

AU - Cai, X. Z.

AU - Caines, H.

AU - Sánchez, M. Calderón De La Barca

AU - Cebra, D.

AU - Ceska, J.

AU - Chakaberia, I.

AU - Chan, B. K.

AU - Chang, Z.

AU - Chatterjee, A.

AU - Chen, D.

AU - Chen, J.

AU - Chen, J. H.

AU - Chen, Q.

AU - Chen, Z.

AU - Cheng, J.

AU - Cheng, Y.

AU - Christie, W.

AU - Chu, X.

AU - Crawford, H. J.

AU - Dale-Gau, G.

AU - Das, A.

AU - Dedovich, T. G.

AU - Deshpande, A.

AU - Jia, J.

AU - Lacey, R.

PY - 2025/1

Y1 - 2025/1

N2 - We report the differential yields at mid-rapidity of the Breit-Wheeler process (γγ→e+e-) in peripheral Au+Au collisions at sNN=54.4 and 200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC), as a function of energy sNN, e+e- transverse momentum pT, pT2, invariant mass Mee, and azimuthal angle. In the invariant mass range of 0.4

AB - We report the differential yields at mid-rapidity of the Breit-Wheeler process (γγ→e+e-) in peripheral Au+Au collisions at sNN=54.4 and 200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC), as a function of energy sNN, e+e- transverse momentum pT, pT2, invariant mass Mee, and azimuthal angle. In the invariant mass range of 0.4

UR - https://www.scopus.com/pages/publications/85215832792

U2 - 10.1103/PhysRevC.111.014909

DO - 10.1103/PhysRevC.111.014909

M3 - Article

AN - SCOPUS:85215832792

SN - 2469-9985

VL - 111

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 014909

ER -

Energy dependence of polarized γγ→e+e- in peripheral Au+Au collisions at sNN =54.4 and 200 GeV with the STAR experiment at RHIC

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