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Proceedings 2019, 10(1), 11; https://doi.org/10.3390/proceedings2019010011

Coherence Effects in Multiple Medium-Induced Radiation

1
Instituto Galego de Fisica de Altas Enerxias (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, 15782 Galicia, Spain
2
Laboratorio de Instrumentacao e Fisica Experimental de Particulas, Av. Prof. Gama Pinto, 2, P-1649-003 Lisbon, Portugal
3
Instituto Superior Tecnico (IST), Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
4
Instituto Galego de Fisica de Altas Enerxias (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, 15782 Galicia, Spain
5
Department of Physics and Technology, University of Bergen, Allegaten 55, 5007 Bergen, Norway
6
Instituto Galego de Fisica de Altas Enerxias (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, 15782 Galicia, Spain
*
Author to whom correspondence should be addressed.
Presented at Hot Quarks 2018—Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus-Nucleus Collisions, Texel, The Netherlands, 7–14 September 2018.
Published: 11 April 2019
PDF [694 KB, uploaded 11 April 2019]

Abstract

In the first part of this work we study the color coherence phenomenon by considering the well-known quark-antiquark antenna with an in-medium hard gluon emission and an extra very soft emission outside it—double antenna. By discussing the coherence effects in terms of the survival probability, we generalize previous studies of the antenna radiation to the case of more than two emitters. After providing support to the jet quenching picture with effective emitters in the QCD cascade, we present a novel setup of an antenna splitting inside the medium taking into account the finite formation time of the dipole, which turns out to be an important scale. We read into the role of coherence and the relevant time scales which control the scenario, while also providing theoretical support for vacuum-like emissions early in the medium. Finally, by mapping the spectrum of in-medium splittings through the corresponding kinematical Lund diagram, we appreciate regimes of a close correspondence to a semi-classical description.
Keywords: Perturbative QCD; jet physics; jet quenching; Quark Gluon Plasma Perturbative QCD; jet physics; jet quenching; Quark Gluon Plasma
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Dominguez, F.; Milhano, J.G.; Salgado, C.A.; Tywoniuk, K.; Vila, V. Coherence Effects in Multiple Medium-Induced Radiation. Proceedings 2019, 10, 11.

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