Lambda N -> NN EFT potentials and hypertriton non-mesonic weak decay

0491115 - ÚJF 2019 RIV GB eng C - Conference Paper (international conference)
Pérez-Obiol, Axel Castaneda - Entem, D. R. - Nogga, A.
Lambda N -> NN EFT potentials and hypertriton non-mesonic weak decay.
Journal of Physics Conference Series. Vol. 1024. Bristol: IOP Publishing, 2018, č. článku 012033. ISSN 1742-6588.
[5th Facility-for-Antiproton-and-Ion_Research (FAIR) NExt Generation ScientistS Conference (FAIRNESS). Sitges (ES), 28.05.2017-03.06.2017]
R&D Projects: GA ČR(CZ) GA15-04301S
Institutional support: RVO:61389005
Keywords : hypernuclei * effective field theory * leading order
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

The potential for the Lambda N -> NN weak transition, the main responsible for the nonmesonic weak decay of hypernuclei, has been developed within the framework of effective field theory (EFT) up to next-to-leading order (NLO). The leading order (LO) and NLO contributions have been calculated in both momentum and coordinate space, and have been organised into the different operators which mediate the Lambda N -> NN transition. We compare the ranges of the one-meson and two-pion exchanges for each operator. The non-mesonic weak decay of the hypertriton has been computed within the plane-wave approximation using the LO weak potential and modern strong EFT NN potentials. Formally, two methods to calculate the final state interactions among the decay products are presented. We briefly comment on the calculation of the (3)(Lambda) H ->(3) He + pi(-) mesonic weak decay.
Permanent Link: http://hdl.handle.net/11104/0285185