Anisotropy of thermal dileptons

TL;DR

This paper predicts a specific anisotropy in the angular distribution of thermal dileptons as a signature of quark interactions with a collective confining color field in heavy ion collisions, introducing a new dilepton source.

Contribution

It introduces a novel dilepton production mechanism involving synchrotron-like radiation from quarks in a confining color field, not previously considered in phenomenological models.

Findings

Predicted anisotropic angular distribution of dileptons.

Presented dilepton production rate and invariant mass spectrum for the new source.

Identified a potential signature for experimental detection.

Abstract

The meaningful specific anisotropy in the angle distribution of leptons with respect to the three-momentum of pair is predicted as a feasibility signature of synchrotron-like mechanism resulting from the quarks interacting with a collective confining color field in the heavy ion collisions. The lepton pair production rate and the spectrum of pair invariant mass are presented for this new dilepton source that is apparently not taken into consideration in the available phenomenological estimates.