About: Measurement of the distributions of event-by-event flow harmonics in lead-lead collisions at root s(NN)=2.76 TeV with the ATLAS detector at the LHC     Goto   Sponge   NotDistinct   Permalink

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Description
  • The distributions of event-by-event harmonic flow coefficients v (n) for n = 2- 4 are measured in = 2.76 TeV Pb + Pb collisions using the ATLAS detector at the LHC. The measurements are performed using charged particles with transverse momentum p (T) > 0.5 GeV and in the pseudorapidity range |eta| < 2.5 in a dataset of approximately 7 mu b(-1) recorded in 2010. The shapes of the v (n) distributions suggest that the associated flow vectors are described by a two-dimensional Gaussian function in central collisions for v (2) and over most of the measured centrality range for v (3) and v (4). Significant deviations from this function are observed for v (2) in mid-central and peripheral collisions, and a small deviation is observed for v (3) in mid-central collisions. In order to be sensitive to these deviations, it is shown that the commonly used multi-particle cumulants, involving four particles or more, need to be measured with a precision better than a few percent. The v (n) distributions are also measured independently for charged particles with 0.5 < p (T) < 1 GeV and p (T) > 1 GeV. When these distributions are rescaled to the same mean values, the adjusted shapes are found to be nearly the same for these two p (T) ranges. The v (n) distributions are compared with the eccentricity distributions from two models for the initial collision geometry: a Glauber model and a model that includes corrections to the initial geometry due to gluon saturation effects. Both models fail to describe the experimental data consistently over most of the measured centrality range.
  • The distributions of event-by-event harmonic flow coefficients v (n) for n = 2- 4 are measured in = 2.76 TeV Pb + Pb collisions using the ATLAS detector at the LHC. The measurements are performed using charged particles with transverse momentum p (T) > 0.5 GeV and in the pseudorapidity range |eta| < 2.5 in a dataset of approximately 7 mu b(-1) recorded in 2010. The shapes of the v (n) distributions suggest that the associated flow vectors are described by a two-dimensional Gaussian function in central collisions for v (2) and over most of the measured centrality range for v (3) and v (4). Significant deviations from this function are observed for v (2) in mid-central and peripheral collisions, and a small deviation is observed for v (3) in mid-central collisions. In order to be sensitive to these deviations, it is shown that the commonly used multi-particle cumulants, involving four particles or more, need to be measured with a precision better than a few percent. The v (n) distributions are also measured independently for charged particles with 0.5 < p (T) < 1 GeV and p (T) > 1 GeV. When these distributions are rescaled to the same mean values, the adjusted shapes are found to be nearly the same for these two p (T) ranges. The v (n) distributions are compared with the eccentricity distributions from two models for the initial collision geometry: a Glauber model and a model that includes corrections to the initial geometry due to gluon saturation effects. Both models fail to describe the experimental data consistently over most of the measured centrality range. (en)
Title
  • Measurement of the distributions of event-by-event flow harmonics in lead-lead collisions at root s(NN)=2.76 TeV with the ATLAS detector at the LHC
  • Measurement of the distributions of event-by-event flow harmonics in lead-lead collisions at root s(NN)=2.76 TeV with the ATLAS detector at the LHC (en)
skos:prefLabel
  • Measurement of the distributions of event-by-event flow harmonics in lead-lead collisions at root s(NN)=2.76 TeV with the ATLAS detector at the LHC
  • Measurement of the distributions of event-by-event flow harmonics in lead-lead collisions at root s(NN)=2.76 TeV with the ATLAS detector at the LHC (en)
skos:notation
  • RIV/68407700:21670/13:00214204!RIV14-MSM-21670___
http://linked.open...avai/predkladatel
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, P(ED2.1.00/03.0058), P(LG13009), P(LG13031), Z(MSM0021620859), Z(MSM6840770039)
http://linked.open...iv/cisloPeriodika
  • 11
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 86786
http://linked.open...ai/riv/idVysledku
  • RIV/68407700:21670/13:00214204
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Heavy-ion collision; harmonic flow; event-by-event fluctuation; unfolding; Hadron-Hadron Scattering (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [35A1DAE883D8]
http://linked.open...i/riv/nazevZdroje
  • JOURNAL OF HIGH ENERGY PHYSICS
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 1311
http://linked.open...iv/tvurceVysledku
  • Abbott, B.
  • Abdallah, J.
  • Aad, G.
  • Gallus, Petr
  • Jakůbek, Jan
  • Král, Vlastimil
  • Kohout, Zdeněk
  • Pospíšil, Stanislav
  • Sopko, Bruno
  • Slavíček, Tomáš
  • Tureček, Daniel
  • Vacek, Václav
  • Vykydal, Zdeněk
  • Zeman, Martin
  • Štekl, Ivan
  • Smolek, Karel
  • Sopko, Vít
  • Šolc, Jaroslav
  • Augsten, Kamil
  • Sodomka, Jaromír
  • Solar, Michael
  • Vlasák, Michal
  • Vokáč, Petr
  • Šimák, Vladislav
  • Abajyan, T.
  • Khalek, S. Abdel
  • Günther, Jaroslav
http://linked.open...ain/vavai/riv/wos
  • 000328332400001
http://linked.open...n/vavai/riv/zamer
issn
  • 1029-8479
number of pages
http://bibframe.org/vocab/doi
  • 10.1007/JHEP11(2013)183
http://localhost/t...ganizacniJednotka
  • 21670
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