Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters

The elastic and radiative π+p scattering are studied in the framework of an effective Lagrangian model for the Δ++ resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic...

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Detalles Bibliográficos
Autores principales: López Castro, Gabriel, Mariano, Alejandro Edgardo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2003
Materias:
Física
Ciencias Exactas
Lagrangian model
analytic S-matrix theory
electromagnetic gauge invariance
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/138779
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-138779
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Ciencias Exactas
Lagrangian model
analytic S-matrix theory
electromagnetic gauge invariance
spellingShingle Física
Ciencias Exactas
Lagrangian model
analytic S-matrix theory
electromagnetic gauge invariance
López Castro, Gabriel
Mariano, Alejandro Edgardo
Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
topic_facet Física
Ciencias Exactas
Lagrangian model
analytic S-matrix theory
electromagnetic gauge invariance
description The elastic and radiative π+p scattering are studied in the framework of an effective Lagrangian model for the Δ++ resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic gauge invariance. The resonant pole (Δ++) and background contributions (ρ0, σ, Δ, and neutron states) are separated according to the principles of the analytic S-matrix theory. The mass and width parameters of the Δ++ obtained from a fit to experimental data on the total cross section are in agreement with the results of a model-independent analysis based on the analytic S-matrix approach. The magnetic dipole moment determined from the radiative p+p scattering is mD++=(6.14 ± 0.51) nuclear magnetons
format Articulo
Articulo
author López Castro, Gabriel
Mariano, Alejandro Edgardo
author_facet López Castro, Gabriel
Mariano, Alejandro Edgardo
author_sort López Castro, Gabriel
title Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title_short Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title_full Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title_fullStr Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title_full_unstemmed Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title_sort unstable particles, gauge invariance and the δ++ resonance parameters
publishDate 2003
url http://sedici.unlp.edu.ar/handle/10915/138779
work_keys_str_mv AT lopezcastrogabriel unstableparticlesgaugeinvarianceandthedresonanceparameters
AT marianoalejandroedgardo unstableparticlesgaugeinvarianceandthedresonanceparameters
bdutipo_str Repositorios
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