General characteristics of ρ̅ρ interactions at low energies in terms of principal axis and impact parameter variables

Abstract

The reaction configuration in momentum and position space has been investigated in detail from exclusive final states in ρ̅ρ interactions at centre of mass energies 2.01 and 2.96 GeV. In momentum space one finds a tendency towards a planar configuration at low multiplicities. In position space, one sees the average impact parameter decreasing with increasing multiplicity. At large multiplicities, events become more phase-space like i.e., more central whereas at lower multiplicities the effect of ρ_t damping can be seen.