$ϕ$ and $ω$ Meson Production in pp Reactions at $p_{lab}$=3.67 GeV/c

DISTO Collaboration; F. Balestra; Y. Bedfer; R. Bertini; L. C. Bland; A. Brenschede; F. Brochard; M. P. Bussa; Seonho Choi; M. Debowski; R. Dressler; M. Dzemidzic; J. -Cl. Faivre; I. V. Falomkin; L. Fava; L. Ferrero; J. Foryciarz; I. Froehlich; V. Frolov; R. Garfagnini; A. Grasso; E. Grosse; S. Heinz; V. V. Ivanov; W. W. Jacobs; W. Kuehn; A. Maggiora; M. Maggiora; A. Manara; D. Panzieri; H. -W. Pfaff; G. Piragino; G. B. Pontecorvo; A. Popov; J. Ritman; P. Salabura; V. Tchalyshev; F. Tosello; S. E. Vigdor; G. Zosi

doi:10.1103/physrevc.63.024004

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$ϕ$ and $ω$ Meson Production in pp Reactions at $p_{lab}$=3.67 GeV/c

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Abstract

The exclusive production cross sections for $ω$ and $ϕ$ mesons have been measured in proton-proton reactions at $p_{lab}=3.67$ GeV/c. The observed $ϕ/ω$ cross section ratio is $(3.8\pm0.2^{+1.2}_{-0.9})\times 10^{-3}$. After phase space corrections, this ratio is enhanced by about an order of magnitude relative to naive predictions based upon the Okubo-Zweig-Iizuka (OZI) rule, in comparison to an enhancement by a factor $\sim 3$ previously observed at higher beam momenta. The modest increase of this enhancement near the production threshold is compared to the much larger increase of the $ϕ/ω$ ratio observed in specific channels of $\bar pp$ annihilation experiments. Furthermore, differential cross section results are also presented which indicate that although the $ϕ$ meson is predominantly produced from a $^3P_1$ proton-proton entrance channel, other partial waves contribute significantly to the production mechanism at this beam momentum.

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DISTO Collaboration, F. Balestra, Y. Bedfer, R. Bertini, L. C. Bland, A. Brenschede, F. Brochard, M. P. Bussa, Seonho Choi, M. Debowski, R. Dressler, M. Dzemidzic, J. -Cl. Faivre, I. V. Falomkin, L. Fava, L. Ferrero, J. Foryciarz, I. Froehlich, V. Frolov, R. Garfagnini, A. Grasso, E. Grosse, S. Heinz, V. V. Ivanov, W. W. Jacobs, W. Kuehn, A. Maggiora, M. Maggiora, A. Manara, D. Panzieri, H. -W. Pfaff, G. Piragino, G. B. Pontecorvo, A. Popov, J. Ritman, P. Salabura, V. Tchalyshev, F. Tosello, S. E. Vigdor, G. Zosi. 2000-11-17. $ϕ$ and $ω$ Meson Production in pp Reactions at $p_{lab}$=3.67 GeV/c. https://doi.org/10.1103/physrevc.63.024004

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