Beam Energy Dependence of Triton Production and Yield Ratio (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mrow><mml:mi>t</mml:mi></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mrow><mml:mi>p</mml:mi></mml:mrow></mml:msub><mml:mo>/</mml:mo><mml:msubsup><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mrow><mml:mi>d</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msubsup></mml:mrow></mml:math>) in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Au</mml:mi><mml:mo>+</mml:mo><mml:mi>Au</mml:mi></mml:mrow></mml:math> Collisions at RHIC
M. I. AbdulhamidAmerican University of Cairo, New Cairo 11835, New Cairo, EgyptB. E. AboonaTexas A&M University, College Station, Texas 77843J. AdamCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicJ. R. AdamsThe Ohio State University, Columbus, Ohio 43210G. AgakishievJoint Institute for Nuclear Research, Dubna 141 980I. AggarwalPanjab University, Chandigarh 160014, IndiaM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaA. AitbaevJoint Institute for Nuclear Research, Dubna 141 980I. I. AlekseevAlikhanov Institute for Theoretical and Experimental Physics NRC “Kurchatov Institute,” Moscow 117218D. M. AndersonTexas A&M University, College Station, Texas 77843A. AparinJoint Institute for Nuclear Research, Dubna 141 980Saba AslamIndian Institute Technology, Patna, Bihar 801106, IndiaJennifer AtchisonAbilene Christian University, Abilene, Texas 79699G. S. AverichevJoint Institute for Nuclear Research, Dubna 141 980V. BairathiInstituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, ChileW. BakerUniversity of California, Riverside, California 92521J. G. BallUniversity of Houston, Houston, Texas 77204K. BarishUniversity of California, Riverside, California 92521P. BhagatUniversity of Jammu, Jammu 180001, IndiaA. BhasinUniversity of Jammu, Jammu 180001, IndiaS. BhattaState University of New York, Stony Brook, New York 11794I. G. BordyuzhinAlikhanov Institute for Theoretical and Experimental Physics NRC “Kurchatov Institute,” Moscow 117218J. D. BrandenburgThe Ohio State University, Columbus, Ohio 43210A. V. BrandinNational Research Nuclear University MEPhI, Moscow 115409X. Z. CaiShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800H. CainesYale University, New Haven, Connecticut 06520M. Calderon De La Barca SanchezUniversity of California, Davis, California 95616D. CebraUniversity of California, Davis, California 95616J. CeskaCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicI. ChakaberiaLawrence Berkeley National Laboratory, Berkeley, California 94720B. K. ChanUniversity of California, Los Angeles, California 90095Z. ChangIndiana University, Bloomington, Indiana 47408A. ChatterjeeNational Institute of Technology Durgapur, Durgapur - 713209, IndiaD. ChenUniversity of California, Riverside, California 92521J. ChenFudan University, Shanghai, 200433J. H. ChenFudan University, Shanghai, 200433Z. ChenShandong University, Qingdao, Shandong 266237Jie ChengTsinghua University, Beijing 100084Yaping ChengUniversity of California, Los Angeles, California 90095S. ChoudhuryFudan University, Shanghai, 200433W. ChristieBrookhaven National Laboratory, Upton, New York 11973X. ChuBrookhaven National Laboratory, Upton, New York 11973H. J. CrawfordUniversity of California, Berkeley, California 94720G. Dale-GauUniversity of Illinois at Chicago, Chicago, Illinois 60607Amita DasCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicM. DaugherityAbilene Christian University, Abilene, Texas 79699T. G. DedovichJoint Institute for Nuclear Research, Dubna 141 980I. M. DeppnerUniversity of Heidelberg, Heidelberg 69120, GermanyA. A. DerevschikovNRC “Kurchatov Institute,” Institute of High Energy Physics, Protvino 142281A. DhamijaPanjab University, Chandigarh 160014, IndiaL. Di CarloWayne State University, Detroit, Michigan 48201L. DidenkoBrookhaven National Laboratory, Upton, New York 11973P. DixitIndian Institute of Science Education and Research (IISER), Berhampur 760010, IndiaX. DongLawrence Berkeley National Laboratory, Berkeley, California 94720J. L. DrachenbergAbilene Christian University, Abilene, Texas 79699E. DuckworthKent State University, Kent, Ohio 44242J. C. DunlopBrookhaven National Laboratory, Upton, New York 11973J. EngelageUniversity of California, Berkeley, California 94720G. EppleyRice University, Houston, Texas 77251ShinIchi EsumiUniversity of Tsukuba, Tsukuba, Ibaraki 305-8571, JapanO. EvdokimovUniversity of Illinois at Chicago, Chicago, Illinois 60607A. EwiglebenLehigh University, Bethlehem, Pennsylvania 18015O. EyserBrookhaven National Laboratory, Upton, New York 11973R. FatemiUniversity of Kentucky, Lexington, Kentucky 40506-0055S. FazioUniversity of Calabria & INFN-Cosenza, Rende 87036, ItalyC. J. FengNational Cheng Kung University, Tainan 70101Y. FengPurdue University, West Lafayette, Indiana 47907E. FinchSouthern Connecticut State University, New Haven, Connecticut 06515Y. FisyakBrookhaven National Laboratory, Upton, New York 11973F. A. FlorYale University, New Haven, Connecticut 06520C. FuCentral China Normal University, Wuhan, Hubei 430079F. J. M. GeurtsRice University, Houston, Texas 77251N. GhimireTemple University, Philadelphia, Pennsylvania 19122A. GibsonValparaiso University, Valparaiso, Indiana 46383K. GopalIndian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, IndiaXiaohua GouShandong University, Qingdao, Shandong 266237D. GrosnickValparaiso University, Valparaiso, Indiana 46383A. GuptaUniversity of Jammu, Jammu 180001, IndiaA. HamedAmerican University of Cairo, New Cairo 11835, New Cairo, EgyptYunping HanRice University, Houston, Texas 77251M. D. HarastyUniversity of California, Davis, California 95616J. W. HarrisYale University, New Haven, Connecticut 06520H. Harrison-SmithUniversity of Kentucky, Lexington, Kentucky 40506-0055Weihong HeFudan University, Shanghai, 200433Xin HeInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000Yang HeShandong University, Qingdao, Shandong 266237Chuang HuInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000Qin HuInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000Y. HuLawrence Berkeley National Laboratory, Berkeley, California 94720H. Z. HuangNational Cheng Kung University, Tainan 70101H. Z. HuangNational Cheng Kung University, Tainan 70101S. L. HuangState University of New York, Stony Brook, New York 11794T. HuangUniversity of Illinois at Chicago, Chicago, Illinois 60607X. HuangTsinghua University, Beijing 100084Y. HuangCentral China Normal University, Wuhan, Hubei 430079T. J. HumanicThe Ohio State University, Columbus, Ohio 43210D. IsenhowerAbilene Christian University, Abilene, Texas 79699M. IsshikiUniversity of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
2023lv
ABI
Аннотация
We report the triton (t) production in midrapidity (|y|<0.5) Au+Au collisions at sqrt[s_{NN}]=7.7-200 GeV measured by the STAR experiment from the first phase of the beam energy scan at the Relativistic Heavy Ion Collider. The nuclear compound yield ratio (N_{t}×N_{p}/N_{d}^{2}), which is predicted to be sensitive to the fluctuation of local neutron density, is observed to decrease monotonically with increasing charged-particle multiplicity (dN_{ch}/dη) and follows a scaling behavior. The dN_{ch}/dη dependence of the yield ratio is compared to calculations from coalescence and thermal models. Enhancements in the yield ratios relative to the coalescence baseline are observed in the 0%-10% most central collisions at 19.6 and 27 GeV, with a significance of 2.3σ and 3.4σ, respectively, giving a combined significance of 4.1σ. The enhancements are not observed in peripheral collisions or model calculations without critical fluctuation, and decreases with a smaller p_{T} acceptance. The physics implications of these results on the QCD phase structure and the production mechanism of light nuclei in heavy-ion collisions are discussed.
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