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The exclusive electroproduction of omega mesons, ep --> e omega p, has been studied in the kinematic range 3 < Q(2) < 20 GeV(2), 40 < W< 120 GeV and /t/ < 0.6 GeV(2) with the ZEUS detector at HERA using an integrated luminosity of 37.7 pb(-1). The omega mesons were identified via the decay omega --> pi(+)pi(-)pi(0). The exclusive cross section in the above kinematic region is sigma(ep-->e omega p) = 0.108 +/- 0.014(stat.) +/- 0.026(syst.) nb. The reaction ep --> e phi p, phi --> pi(+)pi(-)pi(0), has also been measured. The cross sections, as well as the ratios sigma(gamma)(.) (p --> omega p)/sigma(gamma)(.) (0)(-->rho)(p) and sigma(gamma)(.) (p -->omega p)/sigma(gamma)(.) (p -->phi p), are presented as a function of w and Q(2) Thus, for the first time, the properties of omega electroproduction can be compared to those of rho(0),phi and J/psi electroproduction at high W. (C) 2000 Elsevier Science B.V. All rights reserved.

Measurement of exclusive omega electroproduction at HERA / J., B., S., C., M., D., D., K., S., M., B., M., A., P., J., R., R., S., R., Y., G., A., F., A., P., A., G., B., M., B., L., B., D., B., A., B., G., B., G. C., R., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 487:(2000), pp. 273-288. [10.1016/s0370-2693(00)00794-2]

Measurement of exclusive omega electroproduction at HERA

D'AGOSTINI, Giulio;NIGRO, Andrea;
2000

Abstract

The exclusive electroproduction of omega mesons, ep --> e omega p, has been studied in the kinematic range 3 < Q(2) < 20 GeV(2), 40 < W< 120 GeV and /t/ < 0.6 GeV(2) with the ZEUS detector at HERA using an integrated luminosity of 37.7 pb(-1). The omega mesons were identified via the decay omega --> pi(+)pi(-)pi(0). The exclusive cross section in the above kinematic region is sigma(ep-->e omega p) = 0.108 +/- 0.014(stat.) +/- 0.026(syst.) nb. The reaction ep --> e phi p, phi --> pi(+)pi(-)pi(0), has also been measured. The cross sections, as well as the ratios sigma(gamma)(.) (p --> omega p)/sigma(gamma)(.) (0)(-->rho)(p) and sigma(gamma)(.) (p -->omega p)/sigma(gamma)(.) (p -->phi p), are presented as a function of w and Q(2) Thus, for the first time, the properties of omega electroproduction can be compared to those of rho(0),phi and J/psi electroproduction at high W. (C) 2000 Elsevier Science B.V. All rights reserved.
2000
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of exclusive omega electroproduction at HERA / J., B., S., C., M., D., D., K., S., M., B., M., A., P., J., R., R., S., R., Y., G., A., F., A., P., A., G., B., M., B., L., B., D., B., A., B., G., B., G. C., R., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 487:(2000), pp. 273-288. [10.1016/s0370-2693(00)00794-2]
01a Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/496858
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