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20 April 2024

» arxiv » nucl-ex/0305032

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Observation of the Charge Symmetry Breaking d + d -> 4He + pi0 Reaction Near Threshold
E. J. Stephenson ; A. D. Bacher ; C. E. Allgower ; A. Gardestig ; C. Lavelle ; G. A. Miller ; H. Nann ; J. Olmsted ; P. V. Pancella ; M. A. Pickar ; J. Rapaport ; T. Rinckel ; A. Smith ; H. M. Spinka ; U. van Kolck ;
Date:	28 May 2003
Journal:	Phys.Rev.Lett. 91 (2003) 142302
Subject:	nucl-ex
Abstract:	We report the first observation of the charge symmetry breaking d + d -> 4He + pi0 reaction near threshold at the Indiana University Cyclotron Facility. Kinematic reconstruction permitted the separation of 4He + pi0 events from double radiative capture 4He + gamma + gamma events. We measured total cross sections for neutron pion production of 12.7 +- 2.2 pb at 228.5 MeV and 15.1 +- 3.1 pb at 231.8 MeV. The uncertainty is dominated by statistical errors.
Source:	arXiv, nucl-ex/0305032
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