Exciting the quark-gluon plasma with a relativistic jet

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We discuss the properties of a system composed by a static plasma traversed by a jet of particles. Assuming that both the jet and the plasma can be described using a hydrodynamical approach, and in the conformal limit, we find that unstable modes arise when the velocity of the jet is larger than the speed of the sound of the plasma and only modes with momenta smaller than a certain values are unstable. Moreover, for ultrarelativistic velocities of the jet the most unstable modes correspond to relative angles between the velocity of the jet and momentum of the collective mode ~ pi/4. Our results suggest an alternative mechanism for the description of the jet quenching phenomenon, where the jet crossing the plasma loses energy exciting colored unstable modes. In LHC this effect should be seen with an enhanced production of hadrons for some specific values of their momenta and in certain directions of momenta space.
2 pages, 2 figures. Presented at "Heavy Ion Collisions at the LHC: Last Call for Predictions", CERN, Geneva, May-June 2007

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/132527

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0706.3987
 http://arxiv.org/abs/0706.3987

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arXiv