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Measurement of double polarisation asymmetries in omega-photoproduction

Eberhardt, H. and Jude, T. C. and Schmieden, H. and Anisovich, A. V. and Bantes, B. and Bayadilov, D. and Beck, R. and Beloglazov, Yu. and Bichow, M. and Boese, S. and Brinkmann, K. -Th. and Challand, Th. and Crede, V. and Diez, F. and Drexler, P. and Dutz, H. and Elsner, D. and Ewald, R. and Fornet-Ponse, K. and Friedrich, St. and Frommberger, F. and Funke, Ch. and Gottschall, M. and Gridnev, A. and Gruener, M. and Gutz, E. and Hammann, Ch. and Hannappel, J. and Hartmann, J. and Hillert, W. and Hoffmeister, Ph. and Honisch, Ch. and Jaegle, I. and Kaiser, D. and Kalinowsky, H. and Kalischewski, F. and Kammer, S. and Keshelashvili, I. and Kleber, V. and Klein, F. and Klempt, E. and Koop, K. and Krusche, B. and Kube, M. and Lang, M. and Lopatin, I. and Maghrbi, Y. and Makonyi, K. and Metag, V. and Meyer, W. and Mueller, J. and Nanova, M. and Nikonov, V. and Novotny, R. and Piontek, D. and Reeve, S. and Reicherz, G. and Rostomyan, T. and Runkel, S. and Sarantsev, A. and Schaepe, St. and Schmidt, Ch. and Schmitz, R. and Seifen, T. and Sokhoyan, V. and Sumachev, V. and Thiel, A. and Thoma, U. and Urban, M. and van Pee, H. and Walther, D. and Wendel, Ch. and Wiedner, U. and Wilson, A. and Winnebeck, A.. (2015) Measurement of double polarisation asymmetries in omega-photoproduction. Physics letters B, 750. pp. 453-458.

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Official URL: http://edoc.unibas.ch/40403/

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Abstract

The first measurements of the beam-target-helicity-asymmetries E and G in the photoproduction of omega-mesons off protons at the CBELSA/TAPS experiment are reported. E (G) was measured using circularly (linearly) polarised photons and a longitudinally polarised target. E was measured over the photon energy range from close to threshold (E-gamma = 1108 MeV) to E-gamma = 2300 MeV and G at a single energy interval of 1108 < E-gamma < 1300 MeV. Both measurements cover the full solid angle. The observables E and G are highly sensitive to the contribution of baryon resonances, with E acting as a helicity filter in the s-channel. The new results indicate significant s-channel resonance contributions together with contributions from t-channel exchange processes. A partial wave analysis reveals strong contributions from the partial waves with spin-parity J(P) = 3/2(+), 5/2(+), and 3/2(-). (C) 2015 The Authors. Published by Elsevier B.V.
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:Elsevier B.V.
ISSN:0370-2693
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 08:50

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