Inclusive vector-meson production in the central region of pp collisions at √ s = 63 GeV

Abstract

Production of ϱ 0, K ∗0, K ∗0 , and φ have been measured in proton-proton collisions at the CERN Intersecting Storage Rings (ISR) at low p T in the central region. The transverse mass spectra are well described by exp (− aμ T), with a = −6.4±0.2 GeV −1. The cross sections for dσ/ dy| y=0 are 6.5±0.8±1.2 mb for ϱ 0, 1.9±0.3±0.3 mb for K ∗), 1.9±03±03 mb for K ∗0 , and 60.±0.12±0.13 mb for φ, where the first error is statistical and the second is sytematic.