Elliptic Flow in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>A</mml:mi><mml:mi>u</mml:mi><mml:mo>+</mml:mo><mml:mi>A</mml:mi><mml:mi>u</mml:mi></mml:math>Collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>√</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi>NN</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mspace/><mml:mo>=</mml:mo><mml:mspace/><mml:mn>130</mml:mn><mml:mn/><mml:mi/><mml:mi>GeV</mml:mi></mml:math>
K. AckermannArgone National Laboratory, Illinois 60439, USAN. R. AdamsRice University, Houston, Texas 77251C. AdlerUniversity of Frankfurt, Frankfurt, GermanyZ. AhammedPurdue University, West Lafayette, Indiana 47907S. AhmadRice University, Houston, Texas 77251C. AllgowerIndiana University, Bloomington, Indiana 47408J. F. AmsbaughUniversity of Washington, Seattle, Washington 98185M. AndersonUniversity of California, Davis, California 95616E. AnderssenLawrence Berkeley National Laboratory, Berkeley, California 94720H. ArnesenBrookhaven National Laboratory, Upton, New York 11973L. ArnoldG. S. AverichevA. R. BaldwinKent State University, Kent, Ohio 44242J. BalewskiIndiana University, Bloomington, Indiana 47408O. BarannikovaLaboratory for High Energy (JINR), Dubna, RussiaL. S. BarnbyKent State University, Kent, Ohio 44242J. BaudotM. BeddoArgonne National Laboratory, Argonne, Illinois 60439S. BekeleThe Ohio State University, Columbus, Ohio 43210V. V. BelagaR. BellwiedWayne State University, Detroit, Michigan 48201S. BennettWayne State University, Detroit, Michigan 48201J. BercovitzLawrence Berkeley National Laboratory, Berkeley, California 94720J. BergerUniversity of Frankfurt, Frankfurt, GermanyW. BettsThe Ohio State University, Columbus, Ohio 43210H. BichselUniversity of Washington, Seattle, Washington 98185F. BieserLawrence Berkeley National Laboratory, Berkeley, California 94720L. C. BlandIndiana University, Bloomington, Indiana 47408M. A. BloomerLawrence Berkeley National Laboratory, Berkeley, California 94720C. O. BlythUniversity of Birmingham, Birmingham, United KingdomJ. BoehmLawrence Berkeley National Laboratory, Berkeley, California 94720B. E. BonnerRice University, Houston, Texas 77251Dominique BonnetV. SinghLawrence Berkeley National Laboratory, Berkeley, California 94720M. BotloBrookhaven National Laboratory, Upton, New York 11973A. BouchamSUBATECH, Nantes, Nantes, FranceN. BouilloSUBATECH, Nantes, Nantes, FranceS. BouvierSUBATECH, Nantes, Nantes, FranceKevin M. BradleyLawrence Berkeley National Laboratory, Berkeley, California 94720F.P. BradyUniversity of California, Davis, California 95616Edwin S. BraithwaiteUniversity of Arkansas, Little Rock, Arkansas 72204W. J. BraithwaiteUniversity of Arkansas, Little Rock, Arkansas 72204A. V. BrandinMoscow Engineering Physics Institute, Moscow, RussiaR.L. BrownBrookhaven National Laboratory, Upton, New York 11973G. BrugaletteUniversity of Washington, Seattle, Washington 98185C. ByrdUniversity of Arkansas, Little Rock, Arkansas 72204X. Z. CaiThe Ohio State University, Columbus, Ohio 43210M. Calderon De La Barca SanchezYale University, New Haven, Connecticut 06520Carlos CárdenasPurdue University, West Lafayette, Indiana 47907Lincoln D. CarrUniversity of Washington, Seattle, Washington 98185J. CarrollLawrence Berkeley National Laboratory, Berkeley, California 94720J. Castillo CastellanosSUBATECH, Nantes, Nantes, FranceB. CaylorLawrence Berkeley National Laboratory, Berkeley, California 94720D. CebraUniversity of California, Davis, California 95616S. ChatopadhyayWayne State University, Detroit, Michigan 48201M. L. ChenBrookhaven National Laboratory, Upton, New York 11973W. ChenBrookhaven National Laboratory, Upton, New York 11973Y. ChenUniversity of California, Los Angeles, California 90095S. ChernenkoM. CherneyCreighton University, Omaha, Nebraska 68178A. ChikanianYale University, New Haven, Connecticut 06520B. ChoiUniversity of Texas, Austin, Texas 78712J. ChrinCreighton University, Omaha, Nebraska 68178W. ChristieBrookhaven National Laboratory, Upton, New York 11973J. P. CoffinL. ConinSUBATECH, Nantes, Nantes, FranceC. ConsiglioBrookhaven National Laboratory, Upton, New York 11973T. M. CormierWayne State University, Detroit, Michigan 48201J. G. CramerUniversity of Washington, Seattle, Washington 98185H. J. CrawfordUniversity of California, Berkeley, California 94720V. I. DanilovDavid C. DaytonBrookhaven National Laboratory, Upton, New York 11973M. DeMelloRice University, Houston, Texas 77251W. S. DengKent State University, Kent, Ohio 44242A. A. DerevschikovInstitute of High Energy Physics, Protvino, RussiaM. DialinasSUBATECH, Nantes, Nantes, FranceH. DiazBrookhaven National Laboratory, Upton, New York 11973P. DeYoungCarnegie Mellon University, Pittsburgh, Pennsylvania 15213L. DidenkoBrookhaven National Laboratory, Upton, New York 11973D. DiMassimoBrookhaven National Laboratory, Upton, New York 11973J. DioguardiBrookhaven National Laboratory, Upton, New York 11973W. DominikWarsaw University, Warsaw, PolandC. DrancourtSUBATECH, Nantes, Nantes, FranceJ. E. DraperUniversity of California, Davis, California 95616V. B. DuninJ. C. DunlopYale University, New Haven, Connecticut 06520V. EckardtMax-Planck-Institut fuer Physik, Munich, GermanyW. R. EdwardsLawrence Berkeley National Laboratory, Berkeley, California 94720L. G. EfimovTobias EggertMax-Planck-Institut fuer Physik, Munich, GermanyВ. ЕмеляновMoscow Engineering Physics Institute, Moscow, RussiaJ. EngelageUniversity of California, Berkeley, California 94720G. EppleyRice University, Houston, Texas 77251B. ErazmusSUBATECH, Nantes, Nantes, FranceA. EtkinBrookhaven National Laboratory, Upton, New York 11973P. FachiniUniversidade de Sao Paulo, Sao Paulo, BrazilC. FelicianoBrookhaven National Laboratory, Upton, New York 11973D. FerencUniversity of California, Davis, California 95616M.I. FergusonUniversity of California, Los Angeles, California 90095H. FesslerMax-Planck-Institut fuer Physik, Munich, Germany
2001lv
ABI
Аннотация
Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at square root(S)NN = 130 GeV using the STAR Time Projection Chamber at the Relativistic Heavy Ion Collider. The elliptic flow signal, v2, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented.
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