Mapping collinear in-medium parton splittings
| Autor: | Victor Vila, Fabio Dominguez, José Guilherme Milhano, Carlos A. Salgado, Konrad Tywoniuk |
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| Přispěvatelé: | Universidade de Santiago de Compostela. Departamento de Física de Partículas, Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Particle physics Quantum decoherence Nuclear Theory Physics and Astronomy (miscellaneous) Plane (geometry) Transport coefficient Spectrum (functional analysis) FOS: Physical sciences lcsh:Astrophysics Parton Radiation pattern Nuclear Theory (nucl-th) High Energy Physics - Phenomenology Dipole High Energy Physics - Phenomenology (hep-ph) Phase space lcsh:QB460-466 lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Engineering (miscellaneous) |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação instacron:RCAAP European Physical Journal European Physical Journal C Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela instname European Physical Journal C: Particles and Fields, Vol 80, Iss 1, Pp 1-13 (2020) |
| Popis: | We map the spectrum of $1\to 2$ parton splittings inside a medium characterized by a transport coefficient $\hat q$ onto the kinematical Lund plane, taking into account the finite formation time of the process. We discuss the distinct regimes arising in this map for in-medium splittings, pointing out the close correspondence to a semi-classical description in the limit of hard, collinear radiation with short formation times. Although we disregard any modifications of the original parton kinematics in course of the propagation through the medium, subtle modifications to the radiation pattern compared to the vacuum baseline can be traced back to the physics of color decoherence and accumulated interactions in the medium. We provide theoretical support to vacuum-like emissions inside the medium by delimiting the regions of phase space where it is dominant, identifying also the relevant time-scales involved. The observed modifications are shown to be quite general for any dipole created in the medium. Comment: 19 pages, 4 figures |
| Databáze: | OpenAIRE |
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