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Title: Holographic collisions in confining theories
Author: Cardoso, Vitor
Emparan García de Salazar, Roberto A.
Mateos, David (Mateos Solé)
Pani, Paolo
Rocha, Jorge V.
Keywords: Holografia
Teoria quàntica
Col·lisions (Física nuclear)
Forats negres (Astronomia)
Quantum theory
Collisions (Nuclear physics)
Black holes (Astronomy)
Issue Date: 24-Jan-2014
Publisher: Springer Verlag
Abstract: We study the gravitational dual of a high-energy collision in a confining gauge theory. We consider a linearized approach in which two point particles traveling in an AdS-soliton background suddenly collide to form an object at rest (presumably a black hole for large enough center-of-mass energies). The resulting radiation exhibits the features expected in a theory with a mass gap: late-time power law tails of the form t −3/2, the failure of Huygens" principle and distortion of the wave pattern as it propagates. The energy spectrum is exponentially suppressed for frequencies smaller than the gauge theory mass gap. Consequently, we observe no memory effect in the gravitational waveforms. At larger frequencies the spectrum has an upward-stairway structure, which corresponds to the excitation of the tower of massive states in the confining gauge theory. We discuss the importance of phenomenological cutoffs to regularize the divergent spectrum, and the aspects of the full non-linear collision that are expected to be captured by our approach.
Note: Reproducció del document publicat a:
It is part of: Journal of High Energy Physics, 2014, vol. 2014, num. 1, p. 138
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ISSN: 1126-6708
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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