Journal
NUCLEAR PHYSICS A
Volume 954, Issue -, Pages 213-241Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysa.2016.04.039
Keywords
Non-mesonic weak decay; Effective field theory; Hypernuclei
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Funding
- GACR (Czech Republic) [P203/15/04301S]
- Ministerio de Economia y Competitividad (Spain) [FPA2013-47443-C2-2-P, FIS2014-54672-P]
- Generalitat de Catalunya [2014 SGR 401]
- ICCUB (Unidad de Excelencia 'Maria de Maeztu') [MDM-2014-0369]
- Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT]
- Ramon y Cajal program
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The potential in coordinate space for the Lambda N -> 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. (C) 2016 Elsevier B.V. All rights reserved.
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