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Observation of Strong Nuclear Suppression in Exclusive J/ψ Photoproduction in Au+Au Ultraperipheral Collisions at RHIC.
Abdulhamid, M I; Aboona, B E; Adam, J; Adamczyk, L; Adams, J R; Aggarwal, I; Aggarwal, M M; Ahammed, Z; Aschenauer, E C; Aslam, S; Atchison, J; Bairathi, V; Cap, J G Ball; Barish, K; Bellwied, R; Bhagat, P; Bhasin, A; Bhatta, S; Bhosale, S R; Bielcik, J; Bielcikova, J; Brandenburg, J D; Broodo, C; Cai, X Z; Caines, H; Sánchez, M Calderón de la Barca; Cebra, D; Ceska, J; Chakaberia, I; Chaloupka, P; Chan, B K; Chang, Z; Chatterjee, A; Chen, D; Chen, J; Chen, J H; Chen, Z; Cheng, J; Cheng, Y; Choudhury, S; Christie, W; Chu, X; Crawford, H J; Csanád, M; Dale-Gau, G; Das, A; Deppner, I M; Dhamija, A; Dixit, P; Dong, X.
Afiliação
  • Abdulhamid MI; American University in Cairo, New Cairo 11835, Egypt.
  • Aboona BE; Texas A&M University, College Station, Texas 77843.
  • Adam J; Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic.
  • Adamczyk L; AGH University of Krakow, FPACS, Cracow 30-059, Poland.
  • Adams JR; The Ohio State University, Columbus, Ohio 43210.
  • Aggarwal I; Panjab University, Chandigarh 160014, India.
  • Aggarwal MM; Panjab University, Chandigarh 160014, India.
  • Ahammed Z; Variable Energy Cyclotron Centre, Kolkata 700064, India.
  • Aschenauer EC; <a href="https://ror.org/02ex6cf31">Brookhaven National Laboratory</a>, Upton, New York 11973.
  • Aslam S; Indian Institute Technology, Patna, Bihar 801106, India.
  • Atchison J; Abilene Christian University, Abilene, Texas 79699.
  • Bairathi V; Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, Chile.
  • Cap JGB; University of Houston, Houston, Texas 77204.
  • Barish K; University of California, Riverside, California 92521.
  • Bellwied R; University of Houston, Houston, Texas 77204.
  • Bhagat P; University of Jammu, Jammu 180001, India.
  • Bhasin A; University of Jammu, Jammu 180001, India.
  • Bhatta S; State University of New York, Stony Brook, New York 11794.
  • Bhosale SR; ELTE Eötvös Loránd University, Budapest, Hungary H-1117.
  • Bielcik J; Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic.
  • Bielcikova J; Nuclear Physics Institute of the CAS, Rez 250 68, Czech Republic.
  • Brandenburg JD; The Ohio State University, Columbus, Ohio 43210.
  • Broodo C; University of Houston, Houston, Texas 77204.
  • Cai XZ; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800.
  • Caines H; Yale University, New Haven, Connecticut 06520.
  • Sánchez MCB; University of California, Davis, California 95616.
  • Cebra D; University of California, Davis, California 95616.
  • Ceska J; Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic.
  • Chakaberia I; Lawrence Berkeley National Laboratory, Berkeley, California 94720.
  • Chaloupka P; Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic.
  • Chan BK; University of California, Los Angeles, California 90095.
  • Chang Z; Indiana University, Bloomington, Indiana 47408.
  • Chatterjee A; National Institute of Technology Durgapur, Durgapur-713209, India.
  • Chen D; University of California, Riverside, California 92521.
  • Chen J; Shandong University, Qingdao, Shandong 266237.
  • Chen JH; Fudan University, Shanghai, 200433.
  • Chen Z; Shandong University, Qingdao, Shandong 266237.
  • Cheng J; Tsinghua University, Beijing 100084.
  • Cheng Y; University of California, Los Angeles, California 90095.
  • Choudhury S; Fudan University, Shanghai, 200433.
  • Christie W; <a href="https://ror.org/02ex6cf31">Brookhaven National Laboratory</a>, Upton, New York 11973.
  • Chu X; <a href="https://ror.org/02ex6cf31">Brookhaven National Laboratory</a>, Upton, New York 11973.
  • Crawford HJ; University of California, Berkeley, California 94720.
  • Csanád M; ELTE Eötvös Loránd University, Budapest, Hungary H-1117.
  • Dale-Gau G; University of Illinois at Chicago, Chicago, Illinois 60607.
  • Das A; Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic.
  • Deppner IM; University of Heidelberg, Heidelberg 69120, Germany.
  • Dhamija A; Panjab University, Chandigarh 160014, India.
  • Dixit P; Indian Institute of Science Education and Research (IISER), Berhampur 760010, India.
  • Dong X; Lawrence Berkeley National Laboratory, Berkeley, California 94720.
Phys Rev Lett ; 133(5): 052301, 2024 Aug 02.
Article em En | MEDLINE | ID: mdl-39159117
ABSTRACT
We report a measurement of exclusive J/ψ and ψ(2s) photoproduction in Au+Au ultraperipheral collisions at sqrt[s_{NN}]=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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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2024 Tipo de documento: Article
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2024 Tipo de documento: Article