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

doi:10.1103/PhysRevLett.133.052301

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

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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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Publisher Copyright:
© 2024 American Physical Society.

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General Physics and Astronomy

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10.1103/PhysRevLett.133.052301

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@article{0239108d782c48cea1dcdc1bbac915ac,

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 = "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 P. Dixit and R. Fatemi",

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

year = "2024",

month = aug,

day = "2",

doi = "10.1103/PhysRevLett.133.052301",

language = "English",

volume = "133",

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 - 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 - Dixit, P.

AU - Fatemi, 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.

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UR - http://www.scopus.com/inward/citedby.url?scp=85200667322&partnerID=8YFLogxK

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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