Artículo
Magnetic field driven enhancement of the weak decay width of charged pions
Coppola, Máximo
; Gomez Dumm, Daniel Alberto
; Zeballos Noguera, Diego Santiago; Scoccola, Norberto Nerio
Fecha de publicación:
09/2020
Editorial:
Springer
Revista:
Journal of High Energy Physics
ISSN:
1029-8479
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We study the effect of a uniform magnetic field B~ on the decays π − → l − ν¯l , where l − = e −, µ−, carrying out a general analysis that includes four π − decay constants. Taking the values of these constants from a chiral effective Nambu-Jona-Lasinio (NJL) model, it is seen that the total decay rate gets strongly increased with respect to the B = 0 case, with an enhancement factor ranging from ∼ 10 for eB = 0.1 GeV2 up to ∼ 103 for eB = 1 GeV2 . The ratio between electronic and muonic decays gets also enhanced, reaching a value of about 1 : 2 for eB = 1 GeV2 . In addition, we find that for large B the angular distribution of outgoing antineutrinos shows a significant suppression in the direction of the magnetic field.
Palabras clave:
QCD PHENOMENOLOGY
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Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Articulos de INST.DE FISICA LA PLATA
Citación
Coppola, Máximo; Gomez Dumm, Daniel Alberto; Zeballos Noguera, Diego Santiago; Scoccola, Norberto Nerio; Magnetic field driven enhancement of the weak decay width of charged pions; Springer; Journal of High Energy Physics; 2020; 9; 9-2020; 1-19
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