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

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

Denis Dobrokhotov
(
- Lebedev Inst.
)
,
Goran Faldt
(
- Uppsala U.
)
,
Anders Gardestig
(
- Uppsala U.
)
,
Colin Wilkin
(
- University Coll. London
)

May, 1999

8 pages

Published in:

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

e-Print:

nucl-th/9906009 [nucl-th]

DOI:

10.1103/PhysRevLett.83.5246

Report number:

TSL-ISV-99-0208

View in:

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Abstract:

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.

deuteron deuteron: nuclear reaction
pi0: production
helium
charge: symmetry breaking
background
photon: pair production
nuclear reaction: model
Feynman graph
mass spectrum
numerical calculations: interpretation of experiments

References(13)

Figures(0)

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