Dispersive and absorptive corrections to the pion-deuteron scattering length

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

doi:10.1016/j.physletb.2006.12.078

Journal Article

Dispersive and absorptive corrections to the pion-deuteron scattering length

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

2007
North-Holland Publ. Amsterdam

Physics letters / B 648, 46 - 53 (2007) [10.1016/j.physletb.2006.12.078]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10564 doi:10.1016/j.physletb.2006.12.078

Abstract: We present a parameter-free calculation of the dispersive and absorptive contributions to the pion-deuteron scattering length based on chiral perturbation theory. We show that once all diagrams contributing to leading order to this process are included, their net effect provides a small correction to the real part of the pion-deuteron scattering length. At the same time the sizable imaginary part of the pion-deuteron scattering length is reproduced accurately. (c) 2007 Elsevier B.V. All rights reserved.

Keyword(s): pi deuteron: nuclear reaction ; pi deuteron: scattering length ; perturbation theory: chiral ; Feynman graph ; dispersion: correction ; pi nucleon: interaction ; absorption: correction ; numerical calculations