info/FAQ

Research articles

My Pages

Stat

Members: 3644
Articles: 2'497'992
Articles rated: 2609

16 April 2024

» arxiv » 1005.5694

Article overview

In-medium $omega$ mass from the $gamma + Nb o pi^{0}gamma + X$ reaction
The CBELSA/TAPS Collaboration ; M. Nanova ; V.Metag ; 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:	28 May 2010
Abstract:	Data on the photoproduction of $omega$ mesons on nuclei have been re-analyzed in a search for in-medium modifications. The data were taken with the Crystal Barrel(CB)/TAPS detector system at the ELSA accelerator facility in Bonn. First results from the analysis of the data set were published by D. Trnka et al. in Phys. Rev. Lett 94 (2005) 192303 cite{david}, claiming a lowering of the $omega$ mass in the nuclear medium by 14$%$ at normal nuclear matter density. The extracted $omega$ line shape was found to be sensitive to the background subtraction. For this reason a re-analysis of the same data set has been initiated and a new method has been developed to reduce the background and to determine the shape and absolute magnitude of the background directly from the data. Details of the re-analysis and of the background determination are described. The $omega$ signal on the $Nb$ target, extracted in the re-analysis, does not show a deviation from the corresponding line shape on a $LH_2$ target, measured as reference. The earlier claim of an in-medium mass shift is thus not confirmed. The sensitivity of the $omega$ line shape to different in-medium modification scenarios is discussed.
Source:	arXiv, 1005.5694
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap