<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math>production at high transverse momenta in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>p</mml:mi></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi><mml:mo>+</mml:mo><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow></mml:math>collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi mathvariant="italic">NN</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn></mml:mrow></mml:math>GeV
B. I. AbelevUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaB. D. AndersonKent State University, Kent, Ohio 44242, USAD. ArkhipkinG. S. AverichevJ. BalewskiMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAO. BarannikovaUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAL. S. BarnbyUniversity of Birmingham, Birmingham, United KingdomJ. BaudotS. BaumgartYale University, New Haven, Connecticut 06520, USAD. R. BeavisBrookhaven National Laboratory, Upton, New York 11973, USAR. BellwiedWayne State University, Detroit, Michigan 48201, USAF. BenedossoNIKHEF and Utrecht University, Amsterdam, The NetherlandsM. BetancourtMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAR. R. BettsUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAA. BhasinUniversity of Jammu, Jammu 180001, IndiaA. K. BhatiPanjab University, Chandigarh 160014, IndiaH. BichselUniversity of Washington, Seattle, Washington 98195, USAJ. BielčíkNuclear Physics Institute AS CR, 250 68Řežz/Prague, Czech RepublicJ. BielčíkováNuclear Physics Institute AS CR, 250 68Řežz/Prague, Czech RepublicB. BiritzUniversity of California, Los Angeles, California 90095, USAL. C. BlandBrookhaven National Laboratory, Upton, New York 11973, USAM. BombaraUniversity of Birmingham, Birmingham, United KingdomB. E. BonnerRice University, Houston, Texas 77251, USAM. BotjeNIKHEF and Utrecht University, Amsterdam, The NetherlandsJ. BouchetKent State University, Kent, Ohio 44242, USAE. BraidotNIKHEF and Utrecht University, Amsterdam, The NetherlandsA. V. BrandinMoscow Engineering Physics Institute, Moscow RussiaE. BrunaYale University, New Haven, Connecticut 06520, USAS. BueltmannOld Dominion University, Norfolk, Virginia 23529, USAT. P. BurtonUniversity of Birmingham, Birmingham, United KingdomM. BysterskýNuclear Physics Institute AS CR, 250 68Řežz/Prague, Czech RepublicX. Z. CaiShanghai Institute of Applied Physics, Shanghai 201800, People's Republic of ChinaH. CainesYale University, New Haven, Connecticut 06520, USAM. Calderon De La Barca SanchezUniversity of California, Davis, California 95616, USAO. CatuYale University, New Haven, Connecticut 06520, USAD. CebraUniversity of California, Davis, California 95616, USAR. CendejasUniversity of California, Los Angeles, California 90095, USAM. C. CervantesTexas A&M University, College Station, Texas 77843, USAZ. ChajęckiOhio State University, Columbus, Ohio 43210, USAP. ChaloupkaNuclear Physics Institute AS CR, 250 68Řežz/Prague, Czech RepublicS. ChattopadhyayVariable Energy Cyclotron Centre, Kolkata 700064, IndiaH.F. ChenUniversity of Science & Technology of China, Hefei 230026, People's Republic of ChinaJ.H. ChenInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, People's Republic of ChinaJ. Y. ChenInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, People's Republic of ChinaJ. ChengTsinghua University, Beijing 100084, People's Republic of ChinaM. CherneyCreighton University, Omaha, Nebraska 68178, USAA. ChikanianYale University, New Haven, Connecticut 06520, USAK. ChoiPusan National University, Pusan, Republic of KoreaW. ChristieBrookhaven National Laboratory, Upton, New York 11973, USAR. F. ClarkeTexas A&M University, College Station, Texas 77843, USAM. J. M. CodringtonTexas A&M University, College Station, Texas 77843, USAR. CorlissMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAT. M. CormierWayne State University, Detroit, Michigan 48201, USAM. R. CosentinoUniversidade de Sao Paulo, Sao Paulo, BrazilJ. G. CramerUniversity of Washington, Seattle, Washington 98195, USAH. J. CrawfordUniversity of California, Berkeley, California 94720, USAD. DasUniversity of California, Davis, California 95616, USAS. DashInstitute of Physics, Bhubaneswar 751005, IndiaM. DaugherityUniversity of Texas, Austin, Texas 78712, USAL. C. De SilvaWayne State University, Detroit, Michigan 48201, USAТ. Г. ДедовичM. DePhillipsBrookhaven National Laboratory, Upton, New York 11973, USAA. A. DerevschikovInstitute of High Energy Physics, Protvino, RussiaR. Derradi de SouzaUniversidade Estadual de Campinas, Sao Paulo, BrazilL. DidenkoBrookhaven National Laboratory, Upton, New York 11973, USAP. DjawothoTexas A&M University, College Station, Texas 77843, USAS. DograUniversity of Jammu, Jammu 180001, IndiaX. DongLawrence Berkeley National Laboratory, Berkeley, California 94720, USAJ. L. DrachenbergTexas A&M University, College Station, Texas 77843, USAJ. E. DraperUniversity of California, Davis, California 95616, USAJ. C. DunlopBrookhaven National Laboratory, Upton, New York 11973, USAM. R. Dutta MazumdarVariable Energy Cyclotron Centre, Kolkata 700064, IndiaW. R. EdwardsLawrence Berkeley National Laboratory, Berkeley, California 94720, USAL. G. EfimovE. ElhalhuliUniversity of Birmingham, Birmingham, United KingdomM. ElnimrWayne State University, Detroit, Michigan 48201, USAВ. ЕмеляновMoscow Engineering Physics Institute, Moscow RussiaJ. EngelageUniversity of California, Berkeley, California 94720, USAG. EppleyRice University, Houston, Texas 77251, USAB. ErazmusSUBATECH, Nantes, FranceM. EstienneSUBATECH, Nantes, FranceL. EunPennsylvania State University, University Park, Pennsylvania 16802, USAP. FachiniBrookhaven National Laboratory, Upton, New York 11973, USAR. FatemiUniversity of Kentucky, Lexington, Kentucky, 40506-0055, USAJ. FedorišinA. FengInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, People's Republic of ChinaP. FilipE. FinchYale University, New Haven, Connecticut 06520, USAV. FineBrookhaven National Laboratory, Upton, New York 11973, USAY. FisyakBrookhaven National Laboratory, Upton, New York 11973, USAC. A. GagliardiTexas A&M University, College Station, Texas 77843, USAL. GaillardUniversity of Birmingham, Birmingham, United KingdomD. R. GangadharanUniversity of California, Los Angeles, California 90095, USAM. S. GantiVariable Energy Cyclotron Centre, Kolkata 700064, IndiaE. García-SolisUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAA. GeromitsosSUBATECH, Nantes, FranceF. J. M. GeurtsRice University, Houston, Texas 77251, USAV. GhazikhanianUniversity of California, Los Angeles, California 90095, USA
2009lv
ABI
Аннотация
The STAR Collaboration at the Relativistic Heavy Ion Collider presents measurements of $J/\ensuremath{\psi}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}$ at midrapidity and high transverse momentum (${p}_{T}>5 \mathrm{GeV}/c$) in $p+p$ and central $\mathrm{Cu}+\mathrm{Cu}$ collisions at $\sqrt{{s}_{{}_{\mathit{NN}}}}=200$ GeV. The inclusive $J/\ensuremath{\psi}$ production cross section for $\mathrm{Cu}+\mathrm{Cu}$ collisions is found to be consistent at high ${p}_{T}$ with the binary collision-scaled cross section for $p+p$ collisions. At a confidence level of $97%$, this is in contrast to a suppression of $J/\ensuremath{\psi}$ production observed at lower ${p}_{T}$. Azimuthal correlations of $J/\ensuremath{\psi}$ with charged hadrons in $p+p$ collisions provide an estimate of the contribution of $B$-hadron decays to $J/\ensuremath{\psi}$ production of $13%\ifmmode\pm\else\textpm\fi{}5%$.
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