Enhancement of high PT hadrons due to collapsing Z(3) walls in heavy-ion collisions |
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Authors: | A P Mishra A M Srivastava and V K Tiwari |
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Institution: | (1) Yale University, New Haven, CT 06520, USA |
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Abstract: | We discuss enhancement of multiplicities of hadrons at high transverse momentum due to multiple reflections of quarks from
collapsing Z(3) interfaces in the QGP produced in relativistic heavy-ion collisions. By modeling the dependence of effective
mass of the quarks on the Polyakov loop order parameter, we evaluate the reflection coefficient of quarks from collapsing
Z(3) interfaces. We use the effective potential proposed by Pisarski for the Polyakov loop to determine the profile of the
Z(3) interfaces and calculate the reflection probability for quarks. We discuss the formation of a network of these Z(3) walls
in relativistic heavy-ion collisions, in the QGP phase. We do a numerical simulation to calculate the modifications in the
thermal transverse momentum spectra of the quarks/anti-quarks that results from a collapsing wall. We then use the recombination
model to calculate the transverse momentum spectrum of final hadrons. Our results show enhancement of high P
T
hadrons, with the enhancement being stronger for heavier quarks. Further, we find that due to larger reflection coefficient
for heavier quarks, the density of strange and charm quarks/anti-quarks increases inside the collapsing walls. This implies
enhancement in the multiplicities of multi-strange and multi-charmed hadrons. |
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Keywords: | |
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