Phys. Rev. Lett. 83, 5246–5249 (1999)Has Charge Symmetry Breaking Been Observed in the dd→απ0 Reaction?Received 26 May 1999; published in the issue dated 20 December 1999 Estimates are made of the dd→αγγ production cross sections in a model where each neutron-proton pair in the beam and target initiates an np→dγ reaction. This approach, which successfully reproduces observables in two-pion production at intermediate energies, suggests that direct two-photon production could provide a very significant background to the measurement of the charge-symmetry-breaking (CSB) reaction dd→απ0. A nonvanishing CSB cross section has been reported which might be confused with such two-photon production under the given experimental conditions. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.5246
DOI:
10.1103/PhysRevLett.83.5246
PACS:
25.45.-z, 11.30.Hv, 25.10.+s
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