2,449 research outputs found
Anomalous diffusion of pions at RHIC
After pointing out the difference between normal and anomalous diffusion, we
consider a hadron resonance cascade (HRC) model simulation for particle
emission at RHIC and point out, that rescattering in an expanding hadron
resonance gas leads to a heavy tail in the source distribution. The results are
compared to recent PHENIX measurements of the tail of the particle emitting
source in Au+Au collisions at RHIC. In this context, we show, how can one
distinguish experimentally the anomalous diffusion of hadrons from a second
order QCD phase transition.Comment: 12 pages, 26 figures. Presented by T. Csorgo at the 2nd Workshop on
Particle Femtoscopy and Correlations - WPCF in Sao Paulo, sept 2006.
Brazilian Journal of Physics in press, minor misprints fixe
Back-to-Back Correlations for Bosons Modified by Medium
Novel back-to-back correlations are shown to arise for thermal ensembles of
squeezed bosonic states associated with medium-modified mass-shifts. The
strength of these correlations could become unexpectedly large in heavy ion
collisions.Comment: Talk given at Quark Matter 99, Torino, Italy, May 10-15, 1999. LaTeX,
4 pages, 2 eps figures. To appear in Nucl. Phys.
Asymptotics of Randomly Weighted u- and v-statistics: Application to Bootstrap
This paper is mainly concerned with asymptotic studies of weighted bootstrap
for u- and v-statistics. We derive the consistency of the weighted bootstrap u-
and v-statistics, based on i.i.d. and non i.i.d. observations, from some more
general results which we first establish for sums of randomly weighted arrays
of random variables. Some of the results in this paper significantly extend
some well-known results on consistency of u-statistics and also consistency of
sums of arrays of random variables. We also employ a new approach to
conditioning to derive a conditional CLT for weighted bootstrap u- and
v-statistics, assuming the same conditions as the classical central limit
theorems for regular u- and v-statistics
Similar final states from different initial states using new exact solutions of relativistic hydrodynamics
We present exact, analytic and simple solutions of relativistic perfect fluid
hydrodynamics. The solutions allow us to calculate the rapidity distribution of
the particles produced at the freeze-out, and fit them to the measured rapidity
distribution data. We also give an advanced estimation of the energy density
reached in heavy ion collisions, and an improved estimation of the life-time of
the reaction.Comment: This article is a written-up version of the talk given by M. Csanad
on the Zimanyi '75 Memorial Workshop held in Budapest, June 200
Accelerating Solutions of Perfect Fluid Hydrodynamics for Initial Energy Density and Life-Time Measurements in Heavy Ion Collisions
A new class of accelerating, exact, explicit and simple solutions of
relativistic hydrodynamics is presented. Since these new solutions yield a
finite rapidity distribution, they lead to an advanced estimate of the initial
energy density and life-time of high energy heavy ion reactions. Accelerating
solutions are also given for spherical expansions in arbitrary number of
spatial dimensions.Comment: 3 pages, labels in Fig.2b corrected. Based on T. Csorgo's talk at the
XXXVIth Int. Symp. Multiparticle Dynamics (ISMD 2006), Paraty, RJ, Brazil.
Submitted to the Brazilian Journal of Physic
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