Production of eta-prime mesons in the p p ---> p p eta-prime reaction at 3.67-GeV/c

Abstract The ratio of the total exclusive production cross sections for η ' and η mesons has been measured in the pp reaction at p beam =3.67 GeV/ c . The observed η ′ / η ratio is (0.83±0.11 +0.23 −0.18 )×10 −2 from which the exclusive η ′ meson production cross section is determined to be (1.12±0.15 +0.42 −0.31 ) μb. Differential cross section distributions have been measured. Their shape is consistent with isotropic η ′ meson production.