Observation of Strong Nuclear Suppression in Exclusive J/ψ Photoproduction in Au +Au Ultraperipheral Collisions at RHIC

STAR Collaboration

doi:10.1103/PhysRevLett.133.052301

Observation of Strong Nuclear Suppression in Exclusive J/ψ Photoproduction in Au +Au Ultraperipheral Collisions at RHIC

STAR Collaboration

Chemistry

American University in Cairo
Texas A&M University
Czech Technical University in Prague
AGH University of Krakow
Ohio State University
Panjab University
Variable Energy Cyclotron Centre India
Brookhaven National Laboratory
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
Eötvös Loránd University
Czech Academy of Sciences
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
Tsinghua University
University of California at Berkeley
University of Illinois at Chicago
Heidelberg University

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

10 Scopus citations

Abstract

We report a measurement of exclusive J/ψ and ψ(2s) photoproduction in Au+Au ultraperipheral collisions at sNN=200 GeV using the STAR detector. For the first time, (i) the ψ(2s) photoproduction in midrapidity at the Relativistic Heavy-Ion Collider has been experimentally measured; (ii) nuclear suppression factors are measured for both the coherent and incoherent J/ψ production. At average photon-nucleon center-of-mass energy of 25.0 GeV, the coherent and incoherent J/ψ cross sections of Au nuclei are found to be 71±10% and 36±7%, respectively, of that of free protons. The stronger suppression observed in the incoherent production provides a new experimental handle to study the initial-state parton density in heavy nuclei. Data are compared with theoretical models quantitatively.

Original language	English
Article number	052301
Journal	Physical Review Letters
Volume	133
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.133.052301
State	Published - Aug 2 2024

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10.1103/PhysRevLett.133.052301

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@article{b1f767af610640beb49713b658330ec1,

title = "Observation of Strong Nuclear Suppression in Exclusive J/ψ Photoproduction in Au +Au Ultraperipheral Collisions at RHIC",

abstract = "We report a measurement of exclusive J/ψ and ψ(2s) photoproduction in Au+Au ultraperipheral collisions at sNN=200 GeV using the STAR detector. For the first time, (i) the ψ(2s) photoproduction in midrapidity at the Relativistic Heavy-Ion Collider has been experimentally measured; (ii) nuclear suppression factors are measured for both the coherent and incoherent J/ψ production. At average photon-nucleon center-of-mass energy of 25.0 GeV, the coherent and incoherent J/ψ cross sections of Au nuclei are found to be 71±10\% and 36±7\%, respectively, of that of free protons. The stronger suppression observed in the incoherent production provides a new experimental handle to study the initial-state parton density in heavy nuclei. Data are compared with theoretical models quantitatively.",

author = "\{STAR Collaboration\} and Abdulhamid, \{M. I.\} and Aboona, \{B. E.\} and J. Adam and L. Adamczyk and Adams, \{J. R.\} and I. Aggarwal and Aggarwal, \{M. M.\} and Z. Ahammed and Aschenauer, \{E. C.\} and S. Aslam and J. Atchison and V. Bairathi and Cap, \{J. G.Ball\} and K. Barish and R. Bellwied and P. Bhagat and A. Bhasin and S. Bhatta and Bhosale, \{S. R.\} and J. Bielcik and J. Bielcikova and Brandenburg, \{J. D.\} and C. Broodo and Cai, \{X. Z.\} and H. Caines and \{De La Barca S{\'a}nchez\}, \{M. Calder{\'o}n\} and D. Cebra and J. Ceska and I. Chakaberia and P. Chaloupka and Chan, \{B. K.\} and Z. Chang and A. Chatterjee and D. Chen and J. Chen and Chen, \{J. H.\} and Z. Chen and J. Cheng and Y. Cheng and S. Choudhury and W. Christie and X. Chu and Crawford, \{H. J.\} and M. Csan{\'a}d and G. Dale-Gau and A. Das and Deppner, \{I. M.\} and A. Dhamija and J. Jia and R. Lacey",

note = "Publisher Copyright: {\textcopyright} 2024 American Physical Society.",

year = "2024",

month = aug,

day = "2",

doi = "10.1103/PhysRevLett.133.052301",

language = "English",

volume = "133",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "5",

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TY - JOUR

T1 - Observation of Strong Nuclear Suppression in Exclusive J/ψ Photoproduction in Au +Au Ultraperipheral Collisions at RHIC

AU - STAR Collaboration

AU - Abdulhamid, M. I.

AU - Aboona, B. E.

AU - Adam, J.

AU - Adamczyk, L.

AU - Adams, J. R.

AU - Aggarwal, I.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Aschenauer, E. C.

AU - Aslam, S.

AU - Atchison, J.

AU - Bairathi, V.

AU - Cap, J. G.Ball

AU - Barish, K.

AU - Bellwied, R.

AU - Bhagat, P.

AU - Bhasin, A.

AU - Bhatta, S.

AU - Bhosale, S. R.

AU - Bielcik, J.

AU - Bielcikova, J.

AU - Brandenburg, J. D.

AU - Broodo, C.

AU - Cai, X. Z.

AU - Caines, H.

AU - De La Barca Sánchez, M. Calderón

AU - Cebra, D.

AU - Ceska, J.

AU - Chakaberia, I.

AU - Chaloupka, P.

AU - Chan, B. K.

AU - Chang, Z.

AU - Chatterjee, A.

AU - Chen, D.

AU - Chen, J.

AU - Chen, J. H.

AU - Chen, Z.

AU - Cheng, J.

AU - Cheng, Y.

AU - Choudhury, S.

AU - Christie, W.

AU - Chu, X.

AU - Crawford, H. J.

AU - Csanád, M.

AU - Dale-Gau, G.

AU - Das, A.

AU - Deppner, I. M.

AU - Dhamija, A.

AU - Jia, J.

AU - Lacey, R.

PY - 2024/8/2

Y1 - 2024/8/2

N2 - We report a measurement of exclusive J/ψ and ψ(2s) photoproduction in Au+Au ultraperipheral collisions at sNN=200 GeV using the STAR detector. For the first time, (i) the ψ(2s) photoproduction in midrapidity at the Relativistic Heavy-Ion Collider has been experimentally measured; (ii) nuclear suppression factors are measured for both the coherent and incoherent J/ψ production. At average photon-nucleon center-of-mass energy of 25.0 GeV, the coherent and incoherent J/ψ cross sections of Au nuclei are found to be 71±10% and 36±7%, respectively, of that of free protons. The stronger suppression observed in the incoherent production provides a new experimental handle to study the initial-state parton density in heavy nuclei. Data are compared with theoretical models quantitatively.

AB - We report a measurement of exclusive J/ψ and ψ(2s) photoproduction in Au+Au ultraperipheral collisions at sNN=200 GeV using the STAR detector. For the first time, (i) the ψ(2s) photoproduction in midrapidity at the Relativistic Heavy-Ion Collider has been experimentally measured; (ii) nuclear suppression factors are measured for both the coherent and incoherent J/ψ production. At average photon-nucleon center-of-mass energy of 25.0 GeV, the coherent and incoherent J/ψ cross sections of Au nuclei are found to be 71±10% and 36±7%, respectively, of that of free protons. The stronger suppression observed in the incoherent production provides a new experimental handle to study the initial-state parton density in heavy nuclei. Data are compared with theoretical models quantitatively.

UR - https://www.scopus.com/pages/publications/85200667322

U2 - 10.1103/PhysRevLett.133.052301

DO - 10.1103/PhysRevLett.133.052301

M3 - Article

C2 - 39159117

AN - SCOPUS:85200667322

SN - 0031-9007

VL - 133

JO - Physical Review Letters

JF - Physical Review Letters

IS - 5

M1 - 052301

ER -

Observation of Strong Nuclear Suppression in Exclusive J/ψ Photoproduction in Au +Au Ultraperipheral Collisions at RHIC

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