Observation of Strong Nuclear Suppression in Exclusive J/ψ Photoproduction in Au+Au Ultraperipheral Collisions at RHIC
Affiliations
- 1 American University in Cairo, New Cairo 11835, Egypt.
- 2 Texas A&M University, College Station, Texas 77843.
- 3 Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic.
- 4 AGH University of Krakow, FPACS, Cracow 30-059, Poland.
- 5 The Ohio State University, Columbus, Ohio 43210.
- 6 Panjab University, Chandigarh 160014, India.
- 7 Variable Energy Cyclotron Centre, Kolkata 700064, India.
- 8 <a href="https://ror.org/02ex6cf31">Brookhaven National Laboratory</a>, Upton, New York 11973.
- 9 Indian Institute Technology, Patna, Bihar 801106, India.
- 10 Abilene Christian University, Abilene, Texas 79699.
- 11 Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, Chile.
- 12 University of Houston, Houston, Texas 77204.
- 13 University of California, Riverside, California 92521.
- 14 University of Jammu, Jammu 180001, India.
- 15 State University of New York, Stony Brook, New York 11794.
- 16 ELTE Eötvös Loránd University, Budapest, Hungary H-1117.
- 17 Nuclear Physics Institute of the CAS, Rez 250 68, Czech Republic.
- 18 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800.
- 19 Yale University, New Haven, Connecticut 06520.
- 20 University of California, Davis, California 95616.
- 21 Lawrence Berkeley National Laboratory, Berkeley, California 94720.
- 22 University of California, Los Angeles, California 90095.
- 23 Indiana University, Bloomington, Indiana 47408.
- 24 National Institute of Technology Durgapur, Durgapur-713209, India.
- 25 Shandong University, Qingdao, Shandong 266237.
- 26 Fudan University, Shanghai, 200433.
- 27 Tsinghua University, Beijing 100084.
- 28 University of California, Berkeley, California 94720.
- 29 University of Illinois at Chicago, Chicago, Illinois 60607.
- 30 University of Heidelberg, Heidelberg 69120, Germany.
- 31 Indian Institute of Science Education and Research (IISER), Berhampur 760010, India.
- 32 Kent State University, Kent, Ohio 44242.
- 33 Rice University, Houston, Texas 77251.
- 34 University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
- 35 University of Kentucky, Lexington, Kentucky 40506-0055.
- 36 University of Calabria & INFN-Cosenza, Rende 87036, Italy.
- 37 National Cheng Kung University, Tainan 70101.
- 38 Purdue University, West Lafayette, Indiana 47907.
- 39 Southern Connecticut State University, New Haven, Connecticut 06515.
- 40 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000.
- 41 Technische Universität Darmstadt, Darmstadt 64289, Germany.
- 42 Temple University, Philadelphia, Pennsylvania 19122.
- 43 Valparaiso University, Valparaiso, Indiana 46383.
- 44 Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India.
- 45 University of Chinese Academy of Sciences, Beijing, 101408.
- 46 Central China Normal University, Wuhan, Hubei 430079.
- 47 University of Science and Technology of China, Hefei, Anhui 230026.
- 48 Wayne State University, Detroit, Michigan 48201.
- 49 Warsaw University of Technology, Warsaw 00-661, Poland.
- 50 Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany.
- 51 Lehigh University, Bethlehem, Pennsylvania 18015.
- 52 Wuhan University of Science and Technology, Wuhan, Hubei 430065.
- 53 Guangxi Normal University, Guilin, 541004.
- 54 South China Normal University, Guangzhou, Guangdong 510631.
- 55 University of Texas, Austin, Texas 78712.
- 56 National Institute of Science Education and Research, HBNI, Jatni 752050, India.
- 57 Sejong University, Seoul, 05006, South Korea.
- 58 Rutgers University, Piscataway, New Jersey 08854.
- 59 Institute of Nuclear Physics PAN, Cracow 31-342, Poland.
- 60 Max-Planck-Institut für Physik, Munich 80805, Germany.
- 61 Creighton University, Omaha, Nebraska 68178.
- 62 Ball State University, Muncie, Indiana, 47306.
- 63 Huzhou University, Huzhou, Zhejiang 313000.
- 64 Michigan State University, East Lansing, Michigan 48824.
- 65 Argonne National Laboratory, Argonne, Illinois 60439.
- 66 United States Naval Academy, Annapolis, Maryland 21402.
- 67 Chongqing University, Chongqing, 401331.
- PMID: 39159117
- DOI: 10.1103/PhysRevLett.133.052301
Observation of Strong Nuclear Suppression in Exclusive J/ψ Photoproduction in Au+Au Ultraperipheral Collisions at RHIC
Authors
Affiliations
- 1 American University in Cairo, New Cairo 11835, Egypt.
- 2 Texas A&M University, College Station, Texas 77843.
- 3 Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic.
- 4 AGH University of Krakow, FPACS, Cracow 30-059, Poland.
- 5 The Ohio State University, Columbus, Ohio 43210.
- 6 Panjab University, Chandigarh 160014, India.
- 7 Variable Energy Cyclotron Centre, Kolkata 700064, India.
- 8 <a href="https://ror.org/02ex6cf31">Brookhaven National Laboratory</a>, Upton, New York 11973.
- 9 Indian Institute Technology, Patna, Bihar 801106, India.
- 10 Abilene Christian University, Abilene, Texas 79699.
- 11 Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, Chile.
- 12 University of Houston, Houston, Texas 77204.
- 13 University of California, Riverside, California 92521.
- 14 University of Jammu, Jammu 180001, India.
- 15 State University of New York, Stony Brook, New York 11794.
- 16 ELTE Eötvös Loránd University, Budapest, Hungary H-1117.
- 17 Nuclear Physics Institute of the CAS, Rez 250 68, Czech Republic.
- 18 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800.
- 19 Yale University, New Haven, Connecticut 06520.
- 20 University of California, Davis, California 95616.
- 21 Lawrence Berkeley National Laboratory, Berkeley, California 94720.
- 22 University of California, Los Angeles, California 90095.
- 23 Indiana University, Bloomington, Indiana 47408.
- 24 National Institute of Technology Durgapur, Durgapur-713209, India.
- 25 Shandong University, Qingdao, Shandong 266237.
- 26 Fudan University, Shanghai, 200433.
- 27 Tsinghua University, Beijing 100084.
- 28 University of California, Berkeley, California 94720.
- 29 University of Illinois at Chicago, Chicago, Illinois 60607.
- 30 University of Heidelberg, Heidelberg 69120, Germany.
- 31 Indian Institute of Science Education and Research (IISER), Berhampur 760010, India.
- 32 Kent State University, Kent, Ohio 44242.
- 33 Rice University, Houston, Texas 77251.
- 34 University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
- 35 University of Kentucky, Lexington, Kentucky 40506-0055.
- 36 University of Calabria & INFN-Cosenza, Rende 87036, Italy.
- 37 National Cheng Kung University, Tainan 70101.
- 38 Purdue University, West Lafayette, Indiana 47907.
- 39 Southern Connecticut State University, New Haven, Connecticut 06515.
- 40 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000.
- 41 Technische Universität Darmstadt, Darmstadt 64289, Germany.
- 42 Temple University, Philadelphia, Pennsylvania 19122.
- 43 Valparaiso University, Valparaiso, Indiana 46383.
- 44 Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India.
- 45 University of Chinese Academy of Sciences, Beijing, 101408.
- 46 Central China Normal University, Wuhan, Hubei 430079.
- 47 University of Science and Technology of China, Hefei, Anhui 230026.
- 48 Wayne State University, Detroit, Michigan 48201.
- 49 Warsaw University of Technology, Warsaw 00-661, Poland.
- 50 Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany.
- 51 Lehigh University, Bethlehem, Pennsylvania 18015.
- 52 Wuhan University of Science and Technology, Wuhan, Hubei 430065.
- 53 Guangxi Normal University, Guilin, 541004.
- 54 South China Normal University, Guangzhou, Guangdong 510631.
- 55 University of Texas, Austin, Texas 78712.
- 56 National Institute of Science Education and Research, HBNI, Jatni 752050, India.
- 57 Sejong University, Seoul, 05006, South Korea.
- 58 Rutgers University, Piscataway, New Jersey 08854.
- 59 Institute of Nuclear Physics PAN, Cracow 31-342, Poland.
- 60 Max-Planck-Institut für Physik, Munich 80805, Germany.
- 61 Creighton University, Omaha, Nebraska 68178.
- 62 Ball State University, Muncie, Indiana, 47306.
- 63 Huzhou University, Huzhou, Zhejiang 313000.
- 64 Michigan State University, East Lansing, Michigan 48824.
- 65 Argonne National Laboratory, Argonne, Illinois 60439.
- 66 United States Naval Academy, Annapolis, Maryland 21402.
- 67 Chongqing University, Chongqing, 401331.
- PMID: 39159117
- DOI: 10.1103/PhysRevLett.133.052301
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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