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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2008, vol. 668, p. 258-262

Polarisation of the ω meson in the p d → 3He ω reaction at 1360 and 1450 MeV

Schönning K., Bargholtz Chr, Bashkanov M., Berłowski M., Bogoslawsky D., Calén H., Clement H., Demirörs L., Ekström C., Fransson K., Gerén L., Gustafsson L., Höistad B., Ivanov G., Jacewicz M., Jiganov E., Johansson T., Keleta S., Khakimova O., Koch I., Kren F., Kullander S., Kupść A., Kuzmin A., Lindberg K., Marciniewski P., Morosov B., Oelert W., Pauly C., Pettersson H., Petukhov Y., Povtorejko A., Ruber R. J M Y, Scobel W., Shafigullin R., Shwartz B., Skorodko T., Sopov V., Stepaniak J., Tegnér P. E., Engblom P. Thörngren, Tikhomirov V., Turowiecki A., Wagner G. J., Wilkin C., Wolke M., Zabierowski J., Zartova I., Złomańczuk J.

The tensor polarisation of ω mesons produced in the p d → 3He ω reaction has been studied at two energies near threshold. The 3He nuclei were detected in coincidence with the π0 π+ π- or π0 γ decay products of the ω. In contrast to the case of φ{symbol}-meson production, the ω mesons are found to be unpolarised. This brings into question the applicability of the Okubo-Zweig-Iizuka rule when comparing the production of vector mesons in low energy hadronic reactions. © 2008 Elsevier B.V. All rights reserved.