Thermal background corrections to the neutrino electromagnetic vertex in models with charged scalar bosons

Journal Article · Mon Aug 01 00:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.2139· OSTI ID:7171874

Riotto, A ^[1]

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1. International School for Advanced Studies, SISSA-ISAS, Strada Costiera 11, 34014 Miramare, Trieste (Italy) Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35100 Padova (Italy)

We calculate the correction to the neutrino electromagnetic vertex due to the background of electrons in a large class of models, as the supersymmetric model with explicit breaking of [ital R] parity, where charged scalar bosons couple to leptons and which are able to provide an astrophysically interesting value for the neutrino magnetic (electric) moment: [mu][sub [nu]][similar to]10[sup [minus]12][mu][sub [ital B]]. We show that the medium contribution to the chirality-flipping magnetic (electric) dipole moment is not significant; however, a new chirality-flipping, but helicity-conserving, term arises which does not appear in the standard model with the exchange of [ital W] gauge bosons. It signals the presence of [ital CP] and [ital CPT] asymmetries in the medium and can contribute to the emission or absorption of longitudinal photons. We estimate the contribution of this new term to the rate of the plasmon decay process [gamma][sub pl][r arrow][nu][nu] in the core of degenerate stars, showing that it can be comparable to the contribution coming from the vacuum magnetic (dipole) moment. We also calculate the correction to the effective potential of a propagating neutrino in the presence of a magnetic field due to a chirality-preserving contribution to the diagonal magnetic moment from the medium. This contribution is identical for particles and antiparticles and so it need not vanish for Majorana neutrinos.

• OSTI ID: 7171874
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 50:3; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
NEUTRINOS
VERTEX FUNCTIONS
CORRECTIONS
ABSORPTION
BOSONS
CHARGED PARTICLES
CHIRALITY
CP INVARIANCE
CPT THEOREM
ELECTRIC DIPOLES
ELECTRIC MOMENTS
ELECTROMAGNETIC INTERACTIONS
ELECTRONS
EMISSION
HELICITY
MAGNETIC DIPOLES
MAGNETIC MOMENTS
PHOTONS
SUPERSYMMETRY
BASIC INTERACTIONS
DIPOLES
ELEMENTARY PARTICLES
FERMIONS
FUNCTIONS
INTERACTIONS
INVARIANCE PRINCIPLES
LEPTONS
MASSLESS PARTICLES
MULTIPOLES
PARTICLE PROPERTIES
SORPTION
SYMMETRY
662430* - Properties of Leptons- (1992-)
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