Document Eur. Phys. J. A (2008)
DOI: 10.1140/epja/i2008-10620-8
Exclusive ωπ0 production with muons
M. Bettinelli and W. DünnweberUniversität München, D-85748, Garching, Germany
Massimo.Bettinelli@physik.uni-muenchen.de
Received 7 April 2008 / Published online 18 July 2008
Abstract
Using 160GeV muon scattering data collected with the COMPASS experiment at CERN, the exclusive production of ωπ0 via virtual photons was studied. Selective population of a peak around 1250MeV is observed. Possible contributions from spin-parity 1- are searched for, inspecting decay angular correlations. In particular, the orientation of the ω decay plane may allow a distinction from the 1+ b1(1235) state. Our observation is compared with indications of a
(1250) in annihilation and in γp .
14.40.Cs - Other mesons withS =C = 0 , mass < 2.5 GeV.
13.60.Le - Meson production.
25.30.Rw - Electroproduction reactions.
25.30.Mr - Muon-induced reactions (including the EMC effect). Correspondence: Massimo.Bettinelli@physik.uni-muenchen.de
Communicated by Hayian Gao
© Società Italiana di Fisica, Springer-Verlag 2008