Investigation of the dd3Henπ0 reaction with the FZ Jülich WASA-at-COSY facility

P. Adlarson et al. (WASA-at-COSY Collaboration)
Phys. Rev. C 88, 014004 – Published 22 July 2013

Abstract

An exclusive measurement of the dd3Henπ0 reaction was carried out at a beam momentum of pd= 1.2 GeV/c using the WASA-at-COSY facility. Information on the total cross section as well as differential distributions was obtained. The data are described by a phenomenological approach based on a combination of a quasifree model and a partial wave expansion for the three-body reaction. The total cross section is found to be σtot=(2.89±0.01stat±0.06sys±0.29norm)μb. The contribution of the quasifree processes (with the beam or target neutron being a spectator) accounts for 38% of the total cross section and dominates the differential distributions in specific regions of phase space. The remaining part of the cross section can be described by a partial wave decomposition indicating the significance of p-wave contributions in the final state.

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  • Received 12 April 2013

DOI:https://doi.org/10.1103/PhysRevC.88.014004

©2013 American Physical Society

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Vol. 88, Iss. 1 — July 2013

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