496 research outputs found
Studies of three-particle correlations and reaction-plane correlators from STAR
We present STAR measurements of various harmonics of three-particle
correlations in GeV Au+Au collisions at RHIC. The quantity
is measured for inclusive
charged particles for different harmonics and as a function of
collision centrality, transverse momentum and relative pseudorapidity
. These observables provide detailed information on global event
properties like correlations between event planes of different harmonics and
are particularly sensitive to the expansion dynamics of the matter produced in
the collisions. We compare our measurements to different viscous hydrodynamic
models. We argue that these measurements probe the three-dimensional structure
of the initial state and provide unique ways to constrain the transport
parameters involved in hydrodynamic modeling of heavy-ion collisions.Comment: 6 pages, 3 figures, proceedings of the ISMD 2016 conference, August
29 - September 2, 2016, Jeju island, South Korea, submitted to EPJ Web of
Conference
Inclusive hadron distributions in p+p collisions from saturation models of HERA DIS data
Dipole models based on various saturation scenarios provide reasonable fits
to small-x DIS inclusive, diffractive and exclusive data from HERA. Proton
un-integrated gluon distributions extracted from such fits are employed in a
-factorization framework to calculate inclusive gluon distributions at
various energies. The n-particle multiplicity distribution predicted in the
Glasma flux tube approach shows good agreement with data over a wide range of
energies. Hadron inclusive transverse momentum distributions expressed in terms
of the saturation scale demonstrate universal behavior over a wider kinematic
range systematically with increasing center of mass energies.Comment: 4 pages, 6 figures, talk given by P. T. at the conference
"ICPAQGP-2010", Goa, India, 6-10 December 201
Fluctuating Glasma initial conditions and flow in heavy ion collisions
We compute initial conditions in heavy-ion collisions within the Color Glass
Condensate (CGC) framework by combining the impact parameter dependent
saturation model (IP-Sat) with the classical Yang-Mills description of initial
Glasma fields. In addition to fluctuations of nucleon positions, this IP-Glasma
description includes quantum fluctuations of color charges on the length-scale
determined by the inverse nuclear saturation scale Q_s. The model naturally
produces initial energy fluctuations that are described by a negative binomial
distribution. The ratio of triangularity to eccentricity is close to that in a
model tuned to reproduce experimental flow data. We compare transverse momentum
spectra and v_(2,3,4)(p_T) of pions from different models of initial conditions
using relativistic viscous hydrodynamic evolution.Comment: 5 pages, 4 figures, version published in PR
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