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Photoproduction of omega mesons off protons and neutrons

Dietz, F. and Metag, V. and Anisovich, A. V. and Bacelar, J. C. S. and Bantes, B. and Bartholomy, O. and Bayadilov, D. E. and Beck, R. and Belogazov, Y. A. and Castelijns, R. and Crede, V. and Dutz, H. and Elsner, D. and Ewald, R. and Frommberger, F. and Funke, C. and Gothe, R. and Gregor, R. and Gridnev, A. B. and Gutz, E. and Hillert, W. and Hoeffgren, S. and Hoffmeister, P. and Horn, I. and Jaegle, I. and Junkersfeld, J. and Kalinowsky, H. and Kammer, S. and Kleber, V. and Klein, Frank and Klein, Friedrich and Klempt, E. and Konrad, M. and Kotulla, M. and Krusche, B. and Lang, M. and Lohner, H. and Lopatin, I. V. and Lugert, S. and Menze, D. and Mertens, T. and Messchendorp, J. G. and Nikonov, V. A. and Nanova, M. and Novinski, D. V. and Novotny, R. and Ostrick, M. and Pant, L. M. and van Pee, H. and Pfeiffer, M. and Rostomyan, T. and Roy, A. and Schadmand, S. and Schmidt, C. and Schmieden, H. and Schoch, B. and Shende, S. V. and Shklyar, V. and Suele, A. and Sumachev, V. V. and Szczepanek, T. and Thoma, U. and Trnka, D. and Varma, R. and Walter, D. and Wendel, C. and Wilson, A.. (2015) Photoproduction of omega mesons off protons and neutrons. The European physical journal A , 51 (1). p. 6.

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Official URL: http://edoc.unibas.ch/40399/

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Abstract

Omega photoproduction off hydrogen and deuterium has been studied with the tagged photon beam of the ELSA accelerator in Bonn for photon energies up to 2.0 GeV. The omega meson has been identified via the omega -> pi(0) gamma -> gamma gamma gamma decay mode, using the combined setup of the Crystal Barrel/TAPS detector systems. Both inclusive and exclusive analyses have been carried out. Differential and total cross-sections have been derived for omega mesons produced off free protons and off protons and neutrons bound in deuterium. The cross-section for the production off the bound neutron is found to be a factor of a parts per thousand 1.3 larger than the one off the bound proton in the incident beam energy region 1.2 GeV < E (gamma) < 1.6 GeV. For higher incident beam energies this factor goes down to a parts per thousand 1.1 at 2.0 GeV. The cross-sections of this work have been used as normalization for transparency ratio measurements.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Springer-Verlag
ISSN:1434-6001
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:30 Jun 2016 11:01
Deposited On:09 May 2016 08:33

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