Remarks on N N -&gt; N N pi beyond leading order

Hanhart, C.; Wirzba, A.

doi:10.1016/j.physletb.2007.05.038

Journal Article

PreJuSER-60511

Remarks on N N -> N N pi beyond leading order

Hanhart, C.FZJ* ; Wirzba, A.FZJ*

2007
North-Holland Publ. Amsterdam

Physics letters / B 650, 354 - 361 (2007) [10.1016/j.physletb.2007.05.038]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10525 doi:10.1016/j.physletb.2007.05.038

Abstract: In recent years a two-scale expansion was established to study reactions of the type NN -> NN pi within chiral perturbation theory. Then the diagrams of some subclasses that are invariant under the choice of the pion field no longer appear at the same chiral order. In this Letter we show that the proposed expansion still leads to well defined results. We also discuss the appropriate choice of the heavy baryon propagator. (c) 2007 Elsevier B.V. All rights reserved.

Keyword(s): nucleon nucleon: exclusive reaction ; pi: hadroproduction ; perturbation theory: chiral ; effective Lagrangian ; baryon: heavy ; baryon: propagator ; parametrization ; chiral lagrangians (auto) ; effective interactions (auto) ; pion production (auto)