A1 Journal article (refereed)
Unequal rapidity correlators in the dilute limit of the JIMWLK evolution (2019)


Lappi, Tuomas; Ramnath, Andrecia (2019). Unequal rapidity correlators in the dilute limit of the JIMWLK evolution. Physical Review D, 100 (5), 054003. DOI: 10.1103/PhysRevD.100.054003


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Publication details

All authors or editors: Lappi, Tuomas; Ramnath, Andrecia

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2019

Volume: 100

Issue number: 5

Article number: 054003

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.100.054003

Open Access: Open access publication published in a hybrid channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/65466


Abstract

We study unequal rapidity correlators in the stochastic Langevin picture of Jalilian-Marian–Iancu–McLerran–Weigert–Leonidov–Kovner (JIMWLK) evolution in the color glass condensate effective field theory. We discuss a diagrammatic interpretation of the long-range correlators. By separately evolving the Wilson lines in the direct and complex conjugate amplitudes, we use the formalism to study two-particle production at large rapidity separations. We show that the evolution between the rapidities of the two produced particles can be expressed as a linear equation, even in the full nonlinear limit. We also show how the Langevin formalism for two-particle correlations reduces to a Balitsky-Fadin-Kuraev-Lipatov (BFKL) picture in the dilute limit and in momentum space, providing an interpretation of BFKL evolution as a stochastic process for color charges.


Keywords: particle physics; nuclear physics; quantum field theory


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Ministry reporting: Yes

Reporting Year: 2019

JUFO rating: 2


Last updated on 2020-18-08 at 13:31