Coherent photo-produced J$/\psi$ and dielectron yields in isobaric collisions

TL;DR

This paper predicts the production of J/$\eta$ and dielectron pairs via coherent photon interactions in isobaric heavy-ion collisions, providing a testable difference in yields based on nuclear charge and density distributions.

Contribution

It offers the first theoretical predictions for coherent photon-induced J/$\psi$ and dielectron production in isobaric collisions, highlighting differences across systems for experimental verification.

Findings

Yields of coherent J/$\psi$ and dielectron differ significantly between isobaric systems.

Predicted yields can be used to experimentally test the presence of coherent photon interactions.

Provides a framework for analyzing coherent production in hadronic heavy-ion collisions.

Abstract

Recently, significant enhancements of J/$\psi$ and $e^{+} e^{-}$ pair production at very low transverse momenta were observed by the STAR and ALICE collaboration in peripheral hadronic A+A collisions. The anomaly excesses point to evidence of coherent photon-nucleus and photon-photon interactions in violent hadronic heavy-ion collisions, which were conventionally studied only in ultra-peripheral collisions. The isobaric collisions performed at RHIC provides a unique opportunity to test the existence of coherent photon products in hadronic heavy-ion collisions. The idea is that the possible production of coherent photon products is significantly different in different collision systems due to the variations in their charge and nuclear density distributions. In this letter, we focus on the peripheral collisions and provide theoretical predictions for coherent production of J/$\psi$ and dielectron in isobaric collisions. We show that the expected yields differ significantly to perform the experimental test.