Azimuthal Anisotropy of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>K</mml:mi><mml:mi>S</mml:mi><mml:mn>0</mml:mn></mml:msubsup></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Λ</mml:mi><mml:mo>+</mml:mo><mml:mover><mml:mi>Λ</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>Production at Midrapidity from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">A</mml:mi><mml:mi mathvariant="normal">u</mml:mi><mml:mo>+</mml:mo><mml:mi mathvariant="normal">A</mml:mi><mml:mi mathvariant="normal">u</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>130</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi mathvariant="normal">G</mml:mi><mml:mi mathvariant="normal">e</mml:mi><mml:mi mathvariant="normal">V</mml:mi></mml:math>
C. AdlerUniversity of Frankfurt, Frankfurt, GermanyZ. AhammedPurdue University, West Lafayette, Indiana 47907C. AllgowerIndiana University, Bloomington, Indiana 47408J. AmonettKent State University, Kent, Ohio 44242B. D. AndersonKent State University, Kent, Ohio 44242M. AndersonUniversity of California, Davis, California 95616G. S. AverichevJ. BalewskiIndiana University, Bloomington, Indiana 47408O. BarannikovaLaboratory for High Energy (JINR), Dubna, Russia; Purdue University, West Lafayette, Indiana 47907L. S. BarnbyKent State University, Kent, Ohio 44242J. BaudotS. BekeleThe Ohio State University, Columbus, Ohio 43210V. V. BelagaR. BellwiedWayne State University, Detroit, Michigan 48201J. BergerUniversity of Frankfurt, Frankfurt, GermanyH. BichselUniversity of Washington, Seattle, Washington 98195A. BillmeierWayne State University, Detroit, Michigan 48201L. C. BlandBrookhaven National Laboratory, Upton, New York 11973C. O. BlythUniversity of Birmingham, Birmingham, United KingdomB. E. BonnerRice University, Houston, Texas 77251A. BouchamSUBATECH, Nantes, FranceA. V. BrandinMoscow Engineering Physics Institute, Moscow RussiaA. BravarBrookhaven National Laboratory, Upton, New York 11973R. V. CadmanArgonne National Laboratory, Argonne, Illinois 60439X. Z. CaiThe Ohio State University, Columbus, Ohio 43210M. Calderon De La Barca SanchezBrookhaven National Laboratory, Upton, New York 11973Carlos CárdenasPurdue University, West Lafayette, Indiana 47907J. CarrollLawrence Berkeley National Laboratory, Berkeley, California 94720J. Castillo CastellanosSUBATECH, Nantes, FranceM. CastroWayne State University, Detroit, Michigan 48201D. CebraUniversity of California, Davis, California 95616P. ChaloupkaThe Ohio State University, Columbus, Ohio 43210S. ChattopadhyayWayne State University, Detroit, Michigan 48201Y. ChenUniversity of California, Los Angeles, California 90095S. ChernenkoM. CherneyCreighton University, Omaha, Nebraska 68178A. ChikanianYale University, New Haven, Connecticut 06520B. ChoiUniversity of Texas, Austin, Texas 78712W. ChristieBrookhaven National Laboratory, Upton, New York 11973J. P. CoffinT. M. CormierWayne State University, Detroit, Michigan 48201J. G. CramerUniversity of Washington, Seattle, Washington 98195H. J. CrawfordUniversity of California, Berkeley, California 94720W. S. DengBrookhaven National Laboratory, Upton, New York 11973A. A. DerevschikovInstitute of High Energy Physics, Protvino, RussiaL. DidenkoBrookhaven National Laboratory, Upton, New York 11973T. DietelUniversity of Frankfurt, Frankfurt, GermanyJ. E. DraperUniversity of California, Davis, California 95616V. B. DuninJ. C. DunlopYale University, New Haven, Connecticut 06520V. EckardtMax-Planck-Institut fuer Physik, Munich, GermanyL. G. EfimovВ. ЕмеляновMoscow Engineering Physics Institute, Moscow RussiaJ. EngelageUniversity of California, Berkeley, California 94720G. EppleyRice University, Houston, Texas 77251B. ErazmusSUBATECH, Nantes, FranceP. FachiniBrookhaven National Laboratory, Upton, New York 11973V. FaineBrookhaven National Laboratory, Upton, New York 11973K. FilimonovLawrence Berkeley National Laboratory, Berkeley, California 94720E. FinchYale University, New Haven, Connecticut 06520Y. FisyakBrookhaven National Laboratory, Upton, New York 11973D. FlierlUniversity of Frankfurt, Frankfurt, GermanyK. J. FoleyBrookhaven National Laboratory, Upton, New York 11973J. FuInstitute of Particle Physics, Wuhan, Hubei 430079 China; Lawrence Berkeley National Laboratory, Berkeley, California 94720C. A. GagliardiTexas A & M, College Station, Texas 77843N. GagunashviliJ. GansYale University, New Haven, Connecticut 06520L. GaudichetSUBATECH, Nantes, FranceM. GermainF. J. M. GeurtsRice University, Houston, Texas 77251V. GhazikhanianUniversity of California, Los Angeles, California 90095O. GrachovWayne State University, Detroit, Michigan 48201V. GrigorievMoscow Engineering Physics Institute, Moscow RussiaM. GuedonE. GushinMoscow Engineering Physics Institute, Moscow RussiaT. J. HallmanBrookhaven National Laboratory, Upton, New York 11973D. HardtkeLawrence Berkeley National Laboratory, Berkeley, California 94720J. W. HarrisYale University, New Haven, Connecticut 06520T. W. HenryTexas A & M, College Station, Texas 77843S. HeppelmannPennsylvania State University, University Park, Pennsylvania 16802T. HerstonPurdue University, West Lafayette, Indiana 47907B. HippolyteA. HirschPurdue University, West Lafayette, Indiana 47907E. HjortLawrence Berkeley National Laboratory, Berkeley, California 94720G. W. HoffmannUniversity of Texas, Austin, Texas 78712M. HorsleyYale University, New Haven, Connecticut 06520H. Z. HuangUniversity of California, Los Angeles, California 90095T. J. HumanicThe Ohio State University, Columbus, Ohio 43210G. IgoUniversity of California, Los Angeles, California 90095A. IshiharaUniversity of Texas, Austin, Texas 78712Yu. I. IvanshinP. JacobsLawrence Berkeley National Laboratory, Berkeley, California 94720W. W. JacobsIndiana University, Bloomington, Indiana 47408M. A. JanikWarsaw University of Technology, Warsaw, PolandI. JohnsonLawrence Berkeley National Laboratory, Berkeley, California 94720Peter G. JonesUniversity of Birmingham, Birmingham, United KingdomE. G. JuddUniversity of California, Berkeley, California 94720M. KanetaLawrence Berkeley National Laboratory, Berkeley, California 94720M. KaplanCarnegie Mellon University, Pittsburgh, Pennsylvania 15213D. KeaneKent State University, Kent, Ohio 44242
2002lv
ABI
Аннотация
We report STAR results on the azimuthal anisotropy parameter ${v}_{2}$ for strange particles ${K}_{S}^{0}$, $\ensuremath{\Lambda}$, and $\overline{\ensuremath{\Lambda}}$ at midrapidity in $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$ collisions at $\sqrt{{s}_{NN}}=130\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}$ at the Relativistic Heavy Ion Collider. The value of ${v}_{2}$ as a function of transverse momentum, ${p}_{t}$, of the produced particle and collision centrality is presented for both particles up to ${p}_{t}\ensuremath{\sim}3.0\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$. A strong ${p}_{t}$ dependence in ${v}_{2}$ is observed up to $2.0\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$. The ${v}_{2}$ measurement is compared with hydrodynamic model calculations. The physics implications of the ${p}_{t}$ integrated ${v}_{2}$ magnitude as a function of particle mass are also discussed.
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