Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of Centrality Dependence of Transverse Momentum Spectra of Hadrons
  and the Freeze-out Parameters at root(sNN) of 62.4 GeV, 130 GeV and 200 GeV   We attempt to describe the rapidity distribution of P, P-bar, K+ and K- for
the most central Au+Au collisions at root(sNN) of 62.4 GeV,130 GeV and 200 GeV.
The transverse momentum spectra of strange as well as non-strange hadrons e.g.
P, P-bar, K+, K-, Lambda, Lambda-bar, Cascade,Cascade-bar and (Omega +
Omega-bar) are studied for the whole centrality classes at all the three RHIC
energies. The experimental data of the transverse momentum spectra and the
rapidity distributions are well reproduced. This is done by using a statistical
thermal freeze-out model which incorporates the rapidity (collision) axis as
well as transverse direction boosts developed within an expanding hot and dense
hadronic fluid (fireball) till the final freeze-out. We determine the
thermo-chemical freeze-out conditions particularly in terms of temperature,
baryon chemical potential and collective flow effect parameters for different
particle species. The parameters indicate occurrence of freeze-out of the
singly and doubly strange hyperon species at somewhat earlier times during the
evolution of the fireball. Dependence of the freeze-out parameters on the
degree of centrality is also described and it is found that the kinetic
temperature increases and collective flow effect decreases with decreasing
centrality at all energies studied. The nuclear transparency effect is also
studied and it is clear from our model that the nuclear matter becomes more
transparent at the highest RHIC energy compared to lower RHIC energies. The
contribution of heavier hadronic resonance decay is taken into account.

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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-th