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Photoproduction of $omega$ mesons on nuclei near the production threshold
M. Nanova ; J. Weil ; S. Friedrich ; V. Metag ; U. Mosel ; G. Anton ; J.C.S. Bacelar ; O. Bartholomy ; D. Bayadilov ; Y.A. Beloglazov ; R. Bogendörfer ; R. Castelijns ; V. Crede ; H. Dutz ; A. Ehmanns ; D. Elsner ; K. Essig ; R. Ewald ; I. Fabry ; M. Fuchs ; Ch. Funke ; R. Gothe ; R. Gregor ; A.B. Gridnev ; E. Gutz ; S. Höffgen ; P. Hoffmeister ; I. Horn ; J. Hössl ; I. Jaegle ; J. Junkersfeld ; H. Kalinowsky ; Frank Klein ; Friedrich Klein ; E. Klempt ; M. Konrad ; B. Kopf ; M. Kotulla ; B. Krusche ; J. Langheinrich ; H. Löhner ; I.V. Lopatin ; J. Lotz ; S. Lugert ; D. Menze ; T. Mertens ; J.G. Messchendorp ; C. Morales ; R. Novotny ; M. Ostrick ; L.M. Pant ; H. van Pee ; M. Pfeiffer ; A. Roy ; A. Radkov ; S. Schadmand ; Ch. Schmidt ; H. Schmieden ; B. Schoch ; S. Shende ; G. Suft ; A. Süle ; V.V. Sumachev ; T. Szczepanek ; U. Thoma ; D. Trnka ; R. Varma ; D. Walther ; Ch. Weinheimer ; Ch. Wendel ;
Date:	26 Aug 2010
Abstract:	The photoproduction of $omega$ mesons on LH_2, C and Nb has been studied for incident photon energies from 900 to 1300 MeV using the CB/TAPS detector at ELSA. The $omega$ line shape does not show any significant difference between the LH_2 and the Nb targets. The data are compared with results of transport calculations that predict a sensitivity of the $omega$ line shape to in-medium modifications near the production threshold on a free nucleon of $E_{gamma}^{lab}$ = 1109 MeV.}
Source:	arXiv, 1008.4520
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