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Title of Journal: Pramana J Phys

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Abbravation: Pramana

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Springer India

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DOI

10.1007/bf03081405

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0973-7111

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Transverse momentum spectra of the produced hadron

Authors: BEDANGADAS MOHANTY
Publish Date: 2014/04/30
Volume: 82, Issue: 5, Pages: 893-905
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Abstract

The transverse momentum spectra of the produced hadrons have been compared to a model which is based on the assumption that a nucleus–nucleus collision is a superposition of isotropically decaying thermal sources at a given freezeout temperature The freezeout temperature in nucleus–nucleus collisions is fixed from the inverse slope of the transverse momentum spectra of hadrons in nucleon–nucleon collision The successive collisions in thessss nuclear reactions leads to gain in transverse momentum as the nucleons propagate in the nucleus following a random walk pattern The average transverse rapidity shift per collision is determined from the nucleon–nucleus collision data Using this information we obtain parameterfree result for the transverse momentum distribution of produced hadrons in nucleus–nucleus collisions It is observed that such a model is able to explain the transverse mass spectra of the produced pions at SPS energies However it fails to satisfactorily explain the transverse mass spectra of kaons and protons This indicates the presence of collective effect which cannot be accounted for by the initial state collision broadening of transverse momentum of produced hadrons the basis of random walk model

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