Regular Article - Experimental Physics
Exclusive ωπ0 production with muons⋆
Universität München, D-85748, Garching, Germany
Revised: 19 June 2008
Published online: 18 July 2008
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+ b 1(1235) state. Our observation is compared with indications of a (1250) in annihilation and in γp .
PACS: 14.40.Cs Other mesons with S = 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) –
© SIF, Springer-Verlag Berlin Heidelberg, 2008