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      Precision determination of the dpi -> NN transition strength at threshold

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          Abstract

          An unusual but effective way to determine at threshold the dpi -> NN transition strength is to exploit the hadronic ground-state broadening in pionic deuterium, accessible by x-ray spectroscopy. The broadening is dominated by the true absorption channel dpi- -> nn, which is related to s-wave pion production pp -> dpi+ by charge symmetry and detailed balance. Using the exotic atom circumvents the problem of Coulomb corrections to the cross section as necessary in the production experiments. Our dedicated measurement finds (1171+23/-49) meV for the broadening yielding (252+5/-11) \mub.

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          Most cited references10

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          Production and Absorption ofS-Wave Pions at Low Energy by Two Nucleons

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            Faddeev approach to pion production and pion-deuteron scattering

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              The Interaction of\(\pi \)-Mesons with Nuclear Matter

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                Author and article information

                Journal
                22 March 2010
                Article
                10.1103/PhysRevLett.104.142503
                1003.4153
                71a18099-652d-4b5d-ac5d-607e5de6d115

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                History
                Custom metadata
                Phys.Rev.Lett.104:142503,2010
                4 pages, 2 figures, 1 table
                nucl-ex

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