Two-Particle Correlation in thep¯p→3π+3π−π0Reaction at 5.7 GeV/c

Abstract

A study of the two-particle correlation in the $\overline{p}p\to 3{\pi }^{+}3{\pi }^{-}{\pi }^0$ reaction has been carried out, using the variables utilized for describing inclusive processes. Correlation functions expressed in terms of one variable were defined and used for the $\overline{p}p\to 3{\pi }^{+}3{\pi }^{-}{\pi }^0$ channel. A procedure has been proposed which allows one to eliminate events for which the constraints due to the kinematical boundaries yield to negative values of the correlation functions. The fourth-differential transverse-momentum distribution for a pair of outgoing charged pions, $\frac{d^{4}N}{\left(d{\overrightarrow{\mathrm{p}}}_{T1\mathrm{}}d{\overrightarrow{\mathrm{p}}}_{T2\mathrm{}}\right)}$, was described by a simple parametrization, allowing a direct measurement of the correlation between transverse momenta.