Impact of the energy-loss spatial profile and shear-viscosity to entropy-density ratio for the Mach cone versus head-shock signals produced by a fast-moving parton in a quark-gluon plasma

Alejandro Ayala, Jorge David Castaño-Yepes, Isabel Dominguez, and Maria Elena Tejeda-Yeomans
Phys. Rev. C 92, 024910 – Published 19 August 2015

Abstract

We compute the energy and momentum deposited by a fast-moving parton in a quark-gluon plasma using linear viscous hydrodynamics with an energy loss per unit length profile proportional to the path length and with different values of the shear-viscosity to entropy-density ratio. We show that when varying these parameters, the transverse modes dominate over the longitudinal ones and thus energy and momentum is preferentially deposited along the head-shock, as in the case of a constant energy loss per unit length profile and the lowest value for the shear-viscosity to entropy-density ratio.

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  • Received 19 December 2014
  • Revised 26 May 2015

DOI:https://doi.org/10.1103/PhysRevC.92.024910

©2015 American Physical Society

Authors & Affiliations

Alejandro Ayala1,2, Jorge David Castaño-Yepes1, Isabel Dominguez3, and Maria Elena Tejeda-Yeomans4,1

  • 1Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apartado Postal 70-543, México Distrito Federal 04510, Mexico
  • 2Centre for Theoretical and Mathematical Physics, and Department of Physics, University of Cape Town, Rondebosch 7700, South Africa
  • 3Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma de Sinaloa, Avenida de las Américas y Boulevard Universitarios, Ciudad Universitaria, C.P. 80000, Culiacán, Sinaloa, México
  • 4Departamento de Física, Universidad de Sonora, Boulevard Luis Encinas J. y Rosales, Colonia Centro, Hermosillo, Sonora 83000, Mexico

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Vol. 92, Iss. 2 — August 2015

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