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Title:	Next-to-leading order effective field theory ΛN → NN potential in coordinate space
Author:	Pérez Obiol, A.; Entem, D. R.; Juliá-Díaz, Bruno; Parreño García, Assumpta
Other authors:	Universitat de Barcelona
Abstract:	The potential in coordinate space for the ΛN→NNΛN→NN weak transition, which drives the weak decay of most hypernuclei, is derived within the effective field theory formalism up to next-to-leading order. This coordinate space potential allows us to discuss how the different contributions to the potential add up at the different scales. Explicit expressions are given for each two-pion-exchange diagram contributing to the interaction. The potential is also reorganized into spin and isospin operators, and the coefficient for each operator is given in analytical form and represented in coordinate space. The relevance of explicitly including the mass differences among the baryons appearing in the two-pion-exchange diagrams is also discussed in detail.
Subject(s):	-Teoria de camps (Física) -Nucleació -Hiperons -Field theory (Physics) -Nucleation -Hyperons
Rights:	cc-by-nc-nd (c) Elsevier B.V., 2016 http://creativecommons.org/licenses/by-nc-nd/3.0/es
Document type:	Article Article - Accepted version
Published by:	Elsevier B.V.
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