Rho meson production in ultraperipheral dAu collision

TL;DR

This paper reports the first observation of rho meson production in ultra-peripheral deuteron-gold collisions, highlighting electromagnetic interactions at large impact parameters without nucleon-nucleon collisions.

Contribution

It provides the first experimental evidence of rho meson production in ultra-peripheral dAu collisions, expanding understanding of electromagnetic processes in heavy ion interactions.

Findings

First observation of rho meson in dAu ultra-peripheral collisions

Detection of rho^0 production in specific reaction channels

Demonstrates electromagnetic interactions dominate at large impact parameters

Abstract

Ultra-peripheral heavy ion collisions involve long range electromagnetic interactions at impact parameters larger than twice the nuclear radius, where no nucleon-nucleon collisions occur. We report on the first observation of rho meson production in dAu->d Au rho^0 and dAu-> n p Au rho^0.