Measurements of the reaction $\bar{p}p\to \varphi \eta$ of antiproton annihilation at rest at three hydrogen target densities

Abstract

The proton-antiproton annihilation at rest into the $\varphi \eta$ final state was measured for three different target densities: liquid hydrogen, gaseous hydrogen at NTP and at a low pressure of 5 mbar. The yield of this reaction in the liquid hydrogen target is smaller than in the low-pressure gas target. The branching ratios of the $\varphi \eta$ channel were calculated on the basis of simultaneous analysis of the three data samples. The branching ratio for annihilation into $\varphi \eta$ from the ${}^3{S}_1$ protonium state turns out to be about ten times smaller as compared to the one from the ${}^1{P}_1$ state.

arXiv comment10 pages, 3 Postscript figures. Accepted by Physics Letters B

References in corpus (2)

• Abundant phi-Meson Production in pbar-p Annihilation at Rest and Strangeness in the Nucleon
• OZI Rule Violation in p pbar Annihilation into phi pi pi by Two Step Processes

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• Loop Calculations and OZI Rule