Magnetic field driven enhancement of the weak decay width of charged pions

We study the effect of a uniform magnetic field B<sup>→</sup> on the decays π⁻ → l⁻ ν⁻<sub>l</sub>, 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)...

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Autores principales: Coppola, M., Gómez Dumm, Daniel Alberto, Noguera, S., Scoccola, Norberto Nerio
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Exactas
Física
QCD Phenomenology
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124141
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124141
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
QCD Phenomenology
spellingShingle Ciencias Exactas
Física
QCD Phenomenology
Coppola, M.
Gómez Dumm, Daniel Alberto
Noguera, S.
Scoccola, Norberto Nerio
Magnetic field driven enhancement of the weak decay width of charged pions
topic_facet Ciencias Exactas
Física
QCD Phenomenology
description We study the effect of a uniform magnetic field B<sup>→</sup> on the decays π⁻ → l⁻ ν⁻<sub>l</sub>, 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.
format Articulo
Articulo
author Coppola, M.
Gómez Dumm, Daniel Alberto
Noguera, S.
Scoccola, Norberto Nerio
author_facet Coppola, M.
Gómez Dumm, Daniel Alberto
Noguera, S.
Scoccola, Norberto Nerio
author_sort Coppola, M.
title Magnetic field driven enhancement of the weak decay width of charged pions
title_short Magnetic field driven enhancement of the weak decay width of charged pions
title_full Magnetic field driven enhancement of the weak decay width of charged pions
title_fullStr Magnetic field driven enhancement of the weak decay width of charged pions
title_full_unstemmed Magnetic field driven enhancement of the weak decay width of charged pions
title_sort magnetic field driven enhancement of the weak decay width of charged pions
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/124141
work_keys_str_mv AT coppolam magneticfielddrivenenhancementoftheweakdecaywidthofchargedpions
AT gomezdummdanielalberto magneticfielddrivenenhancementoftheweakdecaywidthofchargedpions
AT nogueras magneticfielddrivenenhancementoftheweakdecaywidthofchargedpions
AT scoccolanorbertonerio magneticfielddrivenenhancementoftheweakdecaywidthofchargedpions
bdutipo_str Repositorios
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