Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2003-08-29
Phys.Rev.C71:064906,2005
Physics
Nuclear Physics
Nuclear Experiment
11 pages, 2 figures, submitted to Phys. Rev. C
Scientific paper
10.1103/PhysRevC.71.064906
We present the first large-acceptance measurement of event-wise mean transverse momentum mean p_t fluctuations for Au-Au collisions at nucleon-nucleon center-of-momentum collision energy sqrt{s_{NN}} = 130 GeV. The observed non-statistical mean p_t fluctuations substantially exceed in magnitude fluctuations expected from the finite number of particles produced in a typical collision. The r.m.s. fractional width excess of the event-wise mean p_t distribution is 13.7 +/- 0.1(stat) +/- 1.3(syst)% relative to a statistical reference, for the 15% most-central collisions and for charged hadrons within pseudorapidity range |eta|<1, 2pi azimuth and 0.15 < p_t < 2 GeV/c. The width excess varies smoothly but non-monotonically with collision centrality, and does not display rapid changes with centrality which might indicate the presence of critical fluctuations. The reported mean p_t fluctuation excess is qualitatively larger than those observed at lower energies and differs markedly from theoretical expectations. Contributions to mean p_t mean fluctuations from semi-hard parton scattering in the initial state and dissipation in the bulk colored medium are discussed.
Adams Jeffrey
STAR Collaboration
No associations
LandOfFree
Event-wise mean p_t fluctuations in Au-Au collisions at sqrt{s_{NN}} = 130 GeV does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Event-wise mean p_t fluctuations in Au-Au collisions at sqrt{s_{NN}} = 130 GeV, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Event-wise mean p_t fluctuations in Au-Au collisions at sqrt{s_{NN}} = 130 GeV will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-257892