Coherent meson production relativistic heavy-ion collision

This paper presents a study on the coherent meson production in 12C-emulsion interactions at 4.5 GeV c-1 nucleon -1 incident momentum. The search for coherence was done through noting the shape of the multiplicity distribution in different narrow rapidity bins and observing whether or not the distribution was according to Poisson; when the fields are completely coherent the multiplicity should have a Poisson distribution. It was observed that the multiplicity distribution was Poisson in nature in two bins of higher rapidity, and consequently the field was coherent in those rapidity bins. The percentage of coherent meson production was estimated to be 48%. (10 refs., 2 tabs., fig.)