Has charge symmetry breaking been observed in the d d -> alpha pi0 reaction?

Details Has charge symmetry breaking been observed in the d d -> alpha pi0 reaction? Has charge symmetry breaking been observed in the d d -> alpha pi0 reaction?

1999-06-03

arxiv.org/abs/nucl-th/9906009v1

Phys.Rev.Lett. 83 (1999) 5246-5249

Physics

Nuclear Physics

Nuclear Theory

9 pages, ReVTEX, 2 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.83.5246

Estimates are made of the d d -> alpha gamma gamma production cross sections in a model where each neutron-proton pair in the beam and target initiates an n p -> d gamma 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 d d -> alpha pi0. A non-vanishing CSB cross section has been reported which might be confused with such two-photon production under the given experimental conditions.

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