Dijet imbalance measurements in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Au</mml:mi><mml:mrow><mml:mo>+</mml:mo><mml:mi>Au</mml:mi></mml:mrow></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math> collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi></mml:math> at STAR
L. AdamczykAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. K. AdkinsUniversity of Kentucky, Lexington, Kentucky 40506-0055G. AgakishievJoint Institute for Nuclear Research, Dubna 141 980, RussiaM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaI. AlekseevAlikhanov Institute for Theoretical and Experimental Physics, Moscow 117218, RussiaD. M. AndersonTexas A&M University, College Station, Texas 77843Y. G.Brookhaven National Laboratory, Upton, New York 11973A. AparinJoint Institute for Nuclear Research, Dubna 141 980, RussiaD. ArkhipkinBrookhaven National Laboratory, Upton, New York 11973E. C. AschenauerBrookhaven National Laboratory, Upton, New York 11973M. U. AshrafTsinghua University, Beijing 100084A. AttriPanjab University, Chandigarh 160014, IndiaG. S. AverichevJoint Institute for Nuclear Research, Dubna 141 980, RussiaX. BaiCentral China Normal University, Wuhan, Hubei 430079V. BairathiNational Institute of Science Education and Research, Bhubaneswar 751005, IndiaR. BellwiedUniversity of Houston, Houston, Texas 77204A. BhasinUniversity of Jammu, Jammu 180001, IndiaA. K. BhatiPanjab University, Chandigarh 160014, IndiaP. BhattaraiUniversity of Texas, Austin, Texas 78712J. BielčíkCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicJ. BielčíkováL. C. BlandBrookhaven National Laboratory, Upton, New York 11973I. G. BordyuzhinAlikhanov Institute for Theoretical and Experimental Physics, Moscow 117218, RussiaJ. BouchetKent State University, Kent, Ohio 44242J. D. BrandenburgRice University, Houston, Texas 77251A. V. BrandinNational Research Nuclear University MEPhI, Moscow 115409, RussiaD. S. BrownLehigh University, Bethlehem, Pennsylvania 18015I. BunzarovJoint Institute for Nuclear Research, Dubna 141 980, RussiaJ. M. ButterworthRice University, Houston, Texas 77251H. CainesYale University, New Haven, Connecticut 06520M. Calderon De La Barca SanchezUniversity of California, Davis, California 95616J. M. CampbellThe Ohio State University, Columbus, Ohio 43210D. CebraUniversity of California, Davis, California 95616I. ChakaberiaBrookhaven National Laboratory, Upton, New York 11973P. ChaloupkaCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicZ. ChangTexas A&M University, College Station, Texas 77843A. ChatterjeeVariable Energy Cyclotron Centre, Kolkata 700064, IndiaS. ChattopadhyayVariable Energy Cyclotron Centre, Kolkata 700064, IndiaC. H. ChengShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800X. ChenInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000J. ChengTsinghua University, Beijing 100084M. CherneyCreighton University, Omaha, Nebraska 68178W. ChristieBrookhaven National Laboratory, Upton, New York 11973G. ContinLawrence Berkeley National Laboratory, Berkeley, California 94720H. J. CrawfordUniversity of California, Berkeley, California 94720S. DasInstitute of Physics, Bhubaneswar 751005, IndiaL. C. De SilvaCreighton University, Omaha, Nebraska 68178R. R. DebbeBrookhaven National Laboratory, Upton, New York 11973T. G. DedovichJoint Institute for Nuclear Research, Dubna 141 980, RussiaJ. DengShandong University, Jinan, Shandong 250100A. A. DerevschikovInstitute of High Energy Physics, Protvino 142281, RussiaL. DidenkoBrookhaven National Laboratory, Upton, New York 11973C. DilksPennsylvania State University, University Park, Pennsylvania 16802X. DongLawrence Berkeley National Laboratory, Berkeley, California 94720J. L. DrachenbergLamar University, Physics Department, Beaumont, Texas 77710J. E. DraperUniversity of California, Davis, California 95616C. M. DuInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000L. E. DunkelbergerUniversity of California, Los Angeles, California 90095J. C. DunlopBrookhaven National Laboratory, Upton, New York 11973L. G. EfimovJoint Institute for Nuclear Research, Dubna 141 980, RussiaN. ElseyWayne State University, Detroit, Michigan 48201J. EngelageUniversity of California, Berkeley, California 94720G. EppleyRice University, Houston, Texas 77251R. EshaUniversity of California, Los Angeles, California 90095S. EsumiUniversity of Tsukuba, Tsukuba, Ibaraki 305-8571, JapanO. EvdokimovUniversity of Illinois at Chicago, Chicago, Illinois 60607J. EwiglebenLehigh University, Bethlehem, Pennsylvania 18015O. EyserBrookhaven National Laboratory, Upton, New York 11973R. FatemiUniversity of Kentucky, Lexington, Kentucky 40506-0055S. FazioBrookhaven National Laboratory, Upton, New York 11973P. FedericJ. FedorišinJoint Institute for Nuclear Research, Dubna 141 980, RussiaZ. FengCentral China Normal University, Wuhan, Hubei 430079P. FilipJoint Institute for Nuclear Research, Dubna 141 980, RussiaE. FinchSouthern Connecticut State University, New Haven, Connecticut 06515Y. FisyakBrookhaven National Laboratory, Upton, New York 11973C. E. FloresUniversity of California, Davis, California 95616Ł. FulekAGH University of Science and Technology, FPACS, Cracow 30-059, PolandC. A. GagliardiTexas A&M University, College Station, Texas 77843D. GarandPurdue University, West Lafayette, Indiana 47907F. J. M. GeurtsRice University, Houston, Texas 77251S. M. GibsonValparaiso University, Valparaiso, Indiana 46383M. GirardWarsaw University of Technology, Warsaw 00-661, PolandL. GreinerLawrence Berkeley National Laboratory, Berkeley, California 94720D. GrosnickValparaiso University, Valparaiso, Indiana 46383D. S. GunarathneTemple University, Philadelphia, Pennsylvania 19122Y. GuoUniversity of Science and Technology of China, Hefei, Anhui 230026A. GuptaUniversity of Jammu, Jammu 180001, IndiaS. K. GuptaUniversity of Jammu, Jammu 180001, IndiaW. GurynBrookhaven National Laboratory, Upton, New York 11973A. I. HamadKent State University, Kent, Ohio 44242A. HamedTexas A&M University, College Station, Texas 77843M. R. HaqueNational Institute of Science Education and Research, Bhubaneswar 751005, IndiaJ. W. HarrisYale University, New Haven, Connecticut 06520L. HePurdue University, West Lafayette, Indiana 47907S. HeppelmannPennsylvania State University, University Park, Pennsylvania 16802S. HeppelmannPennsylvania State University, University Park, Pennsylvania 16802A. HirschPurdue University, West Lafayette, Indiana 47907G. W. HoffmannUniversity of Texas, Austin, Texas 78712
2017lv
ABI
Аннотация
We report the first dijet transverse momentum asymmetry measurements from Au+Au and pp collisions at RHIC. The two highest-energy back-to-back jets reconstructed from fragments with transverse momenta above 2 GeV/c display a significantly higher momentum imbalance in heavy-ion collisions than in the pp reference. When reexamined with correlated soft particles included, we observe that these dijets then exhibit a unique new feature-momentum balance is restored to that observed in pp for a jet resolution parameter of R=0.4, while rebalancing is not attained with a smaller value of R=0.2.
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