Observation of $Au + Au o Au + Au + ho^0$ and $Au + Au o Au^* + Au^* + ho^0$ with STAR

摘要

We report the first observation of the reactions $Au + Au \to Au + Au +\rho^0$ and $Au + Au \to Au^* + Au^* + \rho^0$ with the STAR detector. The$\rho$ are produced at small perpendicular momentum, as expected if they couplecoherently to both nuclei. We discuss models of vector meson production and thecorrelation with nuclear breakup, and present a fundamental test of quantummechanics that is possible with the system.