Production of $\eta \prime$ Mesons in the $pp\to pp\eta \prime$ Reaction at 3.67 GeV/c

Abstract

The ratio of the total exclusive production cross sections for $\eta \prime$ and $\eta$ mesons has been measured in the $pp$ reaction at $p_{beam}=3.67$ GeV/c. The observed $\eta \prime /\eta$ ratio is $(0.83\pm {0.11}_{-0.18}^{+0.23})\times 10^{-2}$ from which the exclusive $\eta \prime$ meson production cross section is determined to be $(1.12\pm {0.15}_{-0.31}^{+0.42})\mu b$. Differential cross section distributions have been measured. Their shape is consistent with isotropic $\eta \prime$ meson production.

arXiv comment14 pages, 5 figures, accepted by Phys.Lett.B

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