A modified in-medium evolution equation with color coherence

Autor: Fabio Dominguez, João Barata, Carlos A. Salgado, Víctor Vila
Přispěvatelé: Centre de Physique Théorique [Palaiseau] (CPHT), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), Universidade de Santiago de Compostela. Departamento de Física de Partículas
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Nuclear and High Energy Physics
Particle physics
heavy ion: scattering
splitting
High Energy Physics::Lattice
interference
FOS: Physical sciences
Context (language use)
QC770-798
01 natural sciences
High Energy Physics - Phenomenology (hep-ph)
Nuclear and particle physics. Atomic energy. Radioactivity
jet
0103 physical sciences
quantum chromodynamics
Jets
color: coherence
010306 general physics
Brownian motion
Brookhaven RHIC Coll
quark gluon: plasma
Physics
Quantum chromodynamics
010308 nuclear & particles physics
background
High Energy Physics::Phenomenology
gluon: production
Observable
Heavy Ion Phenomenology
3. Good health
Gluon
cascade
High Energy Physics - Phenomenology
CERN LHC Coll
Cascade
evolution equation
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
Quark–gluon plasma
two-gluon
High Energy Physics::Experiment
formation: time
Coherence (physics)
Zdroj: Journal of High Energy Physics
Journal of High Energy Physics, Springer, 2021, 05, pp.148. ⟨10.1007/JHEP05(2021)148⟩
Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
instname
Journal of High Energy Physics, Vol 2021, Iss 5, Pp 1-24 (2021)
Minerva: Repositorio Institucional de la Universidad de Santiago de Compostela
Universidad de Santiago de Compostela (USC)
ISSN: 1126-6708
1029-8479
DOI: 10.1007/JHEP05(2021)148⟩
Popis: QCD jets produced in heavy-ion collisions at LHC or RHIC energies partially evolve inside the produced hot and dense quark gluon plasma, offering unique opportunities to study QCD splitting processes in different backgrounds. Induced (modified) splittings are expected to be the most relevant mechanism driving the modifications of in-medium jets compared to vacuum jets for a wide sets of observables. Although color coherence among different emitters has been identified as an essential mechanism in studies of the {\it QCD antenna radiation}, it is usually neglected in the multi-gluon medium-induced cascade. This independent gluon emission approximation can be analytically proved to be valid in the limit of very large media, but corrections or modifications to it have not been computed before in the context of the evolution (or rate) equation describing the gluon cascade. We propose a modified evolution equation that includes corrections due to the interference of subsequent emitters. In order to do so, we first compute a modified splitting kernel following the usual procedure of factorizing it from the subsequent Brownian motion. The calculation is performed in the two-gluon configuration with no overlapping formation times, that is expected to provide the first correction to the completely independent picture.
23 pages, 3 figures; Updated text, same results
Databáze: OpenAIRE
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