Artículo
Matrix elements of four-quark operators and Delta L= 2 hyperon decays
Fecha de publicación:
02/2013
Editorial:
Amer Physical Soc
Revista:
Physical Review D
ISSN:
1550-7998
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The study of neutrinoless double beta decays of nuclei and hyperons requires the calculation of hadronic matrix elements of local four-quark operators that change the total charge by two units. Using a low energy effective Lagrangian that induces these transitions, we compute these hadronic matrix elements in the framework of the Massachussetts Institute of Technology bag model. As an illustrative example we evaluate the amplitude and transition rate of Sigma- ---> p e- e-, a decay process that violates lepton number by two units (L = 2). The relevant matrix element is evaluated without assuming the usual factorization approximation of the four-quark operators and the results obtained in both approaches are compared
Palabras clave:
Bag Model
,
Hyperon Decays
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Articulos de INST.DE FISICA LA PLATA
Articulos de INST.DE FISICA LA PLATA
Citación
Barbero, Cesar Alberto; Ling-Fong, Li; Lopez Castro, G; Mariano, Alejandro Edgardo; Matrix elements of four-quark operators and Delta L= 2 hyperon decays; Amer Physical Soc; Physical Review D; 87; 010; 2-2013; 1-6;
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