Eccentricities of Flow-Elliptic Flow Fluctuations and Evidence for Transverse Localization in the Initial State of the Matter in Relativistic Heavy Ion Collisions

  • Recent measurements of event-by-event elliptic flow in Au+Au collisions at sNN=200GeV exhibit large relative fluctuations of about 40%—50%. The data are well described by fluctuations in the shape of the initial collision region, as estimated event-by-event with the participant eccentricity using Glauber Monte Carlo. These results, combined with the demonstrated participant eccentricity scaling of the elliptic flow across nuclear species, constitute evidence of transverse granularity in the initial matter production in these collisions.
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  • [1] . Manly S et al. (PHOBOS). NPA, 2006, 774: 523-5262. Alver B et al. (PHOBOS). Submitted to PRL, 2006, nucl-ex/06100373. Alver B et al. (PHOBOS). 2006, nucl-ex/06080254. Loizides C et al. (PHOBOS). 2006, nucl-ex/07010495. Back B B et al. (PHOBOS). NPA, 2005, 757: 286. Back B B et al. (PHOBOS). PRC, 2005, 72: 051901(R)7. Sorensen P et al. (STAR). 2006, nucl-ex/06120218. Ollitrault J Y. PRD, 1992, 46: 229
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S.Manly8, B.Alver4, B.B.Back1, M.D.Baker2, M.Ballintijn4, D.S.Barton2, R.R.Betts6,
R.Bindel7, W.Busza4, Z.Chai2, V.Chetluru6, E.Garcia6 and T.Gburek3. Eccentricities of Flow-Elliptic Flow Fluctuations and Evidence for Transverse Localization in the Initial State of the Matter in Relativistic Heavy Ion Collisions[J]. Chinese Physics C, 2007, 31(12): 1133-1136.
S.Manly8, B.Alver4, B.B.Back1, M.D.Baker2, M.Ballintijn4, D.S.Barton2, R.R.Betts6,
R.Bindel7, W.Busza4, Z.Chai2, V.Chetluru6, E.Garcia6 and T.Gburek3. Eccentricities of Flow-Elliptic Flow Fluctuations and Evidence for Transverse Localization in the Initial State of the Matter in Relativistic Heavy Ion Collisions[J]. Chinese Physics C, 2007, 31(12): 1133-1136. shu
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Received: 2007-07-17
Revised: 1900-01-01
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Eccentricities of Flow-Elliptic Flow Fluctuations and Evidence for Transverse Localization in the Initial State of the Matter in Relativistic Heavy Ion Collisions

  • Physics Division, Argonne National Laboratory, Argonne, IL 60439-4843, USA2 Chemistry and C-A Departments, Brookhaven National Laboratory,Upton, NY 11973-5000, USA3 Institute of Nuclear Physics PAN,Krakow, Poland4 Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA5 Department of Physics, National Central University, Chung-Li6 Department of Physics, University of Illinois at Chicago, Chicago, IL 60607-7059, USA7 Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA8 Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA

Abstract: Recent measurements of event-by-event elliptic flow in Au+Au collisions at sNN=200GeV exhibit large relative fluctuations of about 40%—50%. The data are well described by fluctuations in the shape of the initial collision region, as estimated event-by-event with the participant eccentricity using Glauber Monte Carlo. These results, combined with the demonstrated participant eccentricity scaling of the elliptic flow across nuclear species, constitute evidence of transverse granularity in the initial matter production in these collisions.

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