Systematic Study Of Azimuthal Anisotropy In Cu Cu And Au Au Collisions At Math Mrow Msqrt Msub Mi Mi Mi Mathvariant
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Systematic Study Of Azimuthal Anisotropy In Cu Cu And Au Au Collisions At Math Mrow Msqrt Msub Mi Mi Mi Mathvariant
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Author :
language : en
Publisher:
Release Date : 2015
Systematic Study Of Azimuthal Anisotropy In Cu Cu And Au Au Collisions At Math Mrow Msqrt Msub Mi Mi Mi Mathvariant written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Systematic Study Of Azimuthal Anisotropy In Cu Cu And Au Au Collisions At U221a Snn
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Author :
language : en
Publisher:
Release Date : 2015
Systematic Study Of Azimuthal Anisotropy In Cu Cu And Au Au Collisions At U221a Snn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
We have studied the dependence of azimuthal anisotropy v2 for inclusive and identified charged hadrons in Au+Au and Cu+Cu collisions on collision energy, species, and centrality. The values of v2 as a function of transverse momentum pT and centrality in Au+Au collisions at √sNN=200 and 62.4 GeV are the same within uncertainties. However, in Cu+Cu collisions we observe a decrease in v2 values as the collision energy is reduced from 200 to 62.4 GeV. The decrease is larger in the more peripheral collisions. By examining both Au+Au and Cu+Cu collisions we find that v2 depends both on eccentricity and the number of participants, Npart. We observe that v2 divided by eccentricity (?) monotonically increases with Npart and scales as N1/3part. Thus, the Cu+Cu data at 62.4 GeV falls below the other scaled v2 data. For identified hadrons, v2 divided by the number of constituent quarks nq is independent of hadron species as a function of transverse kinetic energy KET=mT–m between 0.1KEsubT/sub/nsubq/sub1 GeV. Combining all of the above scaling and normalizations, we observe a near-universal scaling, with the exception of the Cu+Cu data at 62.4 GeV, of vsub2/sub/(nsubq/sub∙????????Nsup1/3/supsubpart/sub) vs KEsubT/sub/n
Azimuthal Anisotropy In Au Au Collisions At Square Root S Sub Nn
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language : en
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Release Date : 2004
Azimuthal Anisotropy In Au Au Collisions At Square Root S Sub Nn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The results from the STAR Collaboration on directed flow (v1), elliptic flow (v2), and the fourth harmonic (v4) in the anisotropic azimuthal distribution of particles from Au+Au collisions at (square root)s{sub NN} = 200 GeV are summarized and compared with results from other experiments and theoretical models. Results for identified particles are presented and fit with a Blast Wave model. For v2, scaling with the number of constituent quarks and parton coalescence is discussed. For v4, scaling with v22 and quark coalescence predictions for higher harmonic flow is discussed. The different anisotropic flow analysis methods are compared and nonflow effects are extracted from the data. For v2, scaling with the number of constituent quarks and parton coalescence are discussed. For v22 and quark coalescence are discussed.
Azimuthal Anisotropy Of Meson In U U And Au Au Collisions At Rhic
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language : en
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Release Date : 2016
Azimuthal Anisotropy Of Meson In U U And Au Au Collisions At Rhic written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Azimuthal Elliptic Anisotropy V2 Of High Pt Direct In Au Au Collisions At
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language : en
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Release Date : 2015
Azimuthal Elliptic Anisotropy V2 Of High Pt Direct In Au Au Collisions At written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Measurement Of Non Flow Correlations And Elliptic Flow Fluctuations In Au Au Collisions At Relativistic Heavy Ion Collider
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Author : Burak Han Alver
language : en
Publisher:
Release Date : 2010
Measurement Of Non Flow Correlations And Elliptic Flow Fluctuations In Au Au Collisions At Relativistic Heavy Ion Collider written by Burak Han Alver and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Measurements of collective flow and two-particle correlations have proven to be effective tools for understanding the properties of the system produced in ultrarelativistic nucleus-nucleus collisions at the Relativistic Heavy Ion Collider (RHIC). Accurate modeling of the initial conditions of a heavy ion collision is crucial in the interpretation of these results. The anisotropic shape of the initial geometry of heavy ion collisions with finite impact parameter leads to an anisotropic particle production in the azimuthal direction through collective flow of the produced medium. In "head-on" collisions of Copper nuclei at ultrarelativistic energies, the magnitude of this "elliptic flow" has been observed to be significantly large. This is understood to be due to fluctuations in the initial geometry which leads to a significant anisotropy even for most central Cu+Cu collisions. This thesis presents a phenomenological study of the effect of initial geometry fluctuations on two-particle correlations and an experimental measurement of the magnitude of elliptic flow fluctuations which is predicted to be large if initial geometry fluctuations are present. Two-particle correlation measurements in Au+Au collisions at the top RHIC energies have shown that after correction for contributions from elliptic flow, strong azimuthal correlation signals are present at A0 = 0 and A0 ~ 120. These correlation structures may be understood in terms of event-by-event fluctuations which result in a triangular anisotropy in the initial collision geometry of heavy ion collisions, which in turn leads to a triangular anisotropy in particle production. It is observed that similar correlation structures are observed in A Multi-Phase Transport (AMPT) model and are, indeed, found to be driven by the triangular anisotropy in the initial collision geometry. Therefore "triangular flow" may be the appropriate description of these correlation structures in data. The measurement of elliptic flow fluctuations is complicated by the contributions of statistical fluctuations and other two-particle correlations (non-flow correlations) to the observed fluctuations in azimuthal particle anisotropy. New experimental techniques, which crucially rely on the uniquely large coverage of the PHOBOS detector at RHIC, are developed to quantify and correct for these contributions. Relative elliptic flow fluctuations of approximately 30-40% are observed in 6-45% most central Au+Au collisions at s NN= 200 GeV. These results are consistent with the predicted initial geometry fluctuations.
Dielectron Azimuthal Anisotropy At Mid Rapidity In Au Au Collisions At Root S
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language : en
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Release Date : 2014
Dielectron Azimuthal Anisotropy At Mid Rapidity In Au Au Collisions At Root S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.