Precision calculation of gamma d -&gt; pi n n within chiral perturbation theory

Lensky, V.; Baru, V.; Kudryavtsev, A. E.; Hanhart, C.; Haidenbauer, J.; Meissner, U.G.

doi:10.1140/epja/i2005-10154-7

Journal Article

Precision calculation of gamma d -> pi n n within chiral perturbation theory

Lensky, V.FZJ* ; Baru, V.FZJ* ; Haidenbauer, J.FZJ* ; Hanhart, C.FZJ* ; Kudryavtsev, A. E.FZJ* ; Meissner, U. G.FZJ*

2005
Springer Berlin

The European physical journal / A 26, 107 - 123 (2005) [10.1140/epja/i2005-10154-7]

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/10625 doi:10.1140/epja/i2005-10154-7

Abstract: The reaction gamma d -> pi(+)nn is calculated up to order chi(5/2) in chiral perturbation theory, where chi denotes the ratio of the pion to the nucleon mass. Special emphasis is put on the role of nucleon recoil corrections that are the source of contributions with fractional power in X. Using the known near-threshold production amplitude for gamma p -> pi(+)n as the only input, the total cross-section for gamma d -> pi(+)nn is described very well. A conservative estimate suggests that the theoretical uncertainty for the transition operator amounts to 3% for the computed amplitude near threshold..

Keyword(s): photon deuteron: nuclear reaction ; perturbation theory: chiral ; perturbation theory: higher-order ; correction: recoil ; channel cross section: energy dependence ; partial wave analysis ; approximation: static ; numerical calculations ; photon deuteron --> 2n pi+