Characteristic size for the neutrino

Journal Article · Thu Feb 28 23:00:00 EST 1985 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.31.1091· OSTI ID:6130480

Lucio, J L; Rosado, A; Zepeda, A

The possibility of attributing a characteristic size to the neutrino is discussed in the context of the Glashow-Salam-Weinberg model of the electroweak interactions. We define the electroweak radius by means of the ..nu../sub l/l' scattering amplitude at the one-loop level. This amplitude can be written, in a certain kinematical domain, in terms of only two form factors, which multiply the electromagnetic current and the weak neutral current, respectively. Since the first one does not depend on the properties of the charged lepton l', its derivative gives a suitable measure of the neutrino size. By construction, the electroweak radius so defined is a finite and gauge-independent quantity of the order 10/sup -33/ cm/sup 2/, and it gets contributions from the proper neutrino electromagnetic vertex, from the ..gamma..-Z self-energy, and from part of the box diagrams. We also show explicitly the gauge dependence of the first two contributions.

• Research Organization: Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional, Apartado Postal 14-740, 07000 Mexico, D.F., Mexico
• OSTI ID: 6130480
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 31:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BASIC INTERACTIONS
CORRECTIONS
ELECTROMAGNETIC FORM FACTORS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FORM FACTORS
INFRARED DIVERGENCES
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MASSLESS PARTICLES
NEUTRINOS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PARTICLE RADII
RADIATIVE CORRECTIONS
SCATTERING AMPLITUDES
SELF-ENERGY
WEAK INTERACTIONS