Feynman Amplitude Approach to study the Passage of a Jet in a Medium

TL;DR

This paper uses the Feynman amplitude approach to analyze how Bose-Einstein symmetry causes collective momentum transfer during jet-medium interactions, potentially explaining observed angular correlations in high-energy collisions.

Contribution

It introduces a novel application of the Feynman amplitude method to study Bose-Einstein interference effects in jet propagation through a medium.

Findings

Bose-Einstein symmetry leads to destructive and constructive interference regions.

Collective longitudinal momentum transfer occurs along the jet direction.

Possible explanation for angular correlations observed at RHIC and LHC.

Abstract

In the Feynman amplitude approach for coherent collisions of a jet with medium partons, the Bose-Einstein symmetry with respect to the interchange of the exchanged bosons leads to a destructive interference of the amplitudes in most regions of the phase space but a constructive interference in some other regions. As a consequence, there is a collective longitudinal momentum transfer to the scatterers along the jet direction, each scatterer carrying a substantial fraction of the incident jet longitudinal momentum. The manifestation of the Bose-Einstein interference may have been observed in angular correlations of hadrons associated with a high-p_T trigger in high-energy collisions at RHIC and LHC.