THE TWO NEUTRINOS

Journal Article · Tue Jan 01 04:00:00 EST 1963 · Fiz. Szemle

OSTI ID:4081895

Nagy, K

In order to explain the contradictions observed in the energy spectrum of electrons and positrons emitted during BETA decay, the existence of the neutrino was postulated by W. Pauli in 1933. Dirac equations require the existence of the antineutrino: both particles are electrically neutral, with a spin of 1/2, while their mass and magnetic moment are zero. Double BETA decay was considered useful for differentiating between these two similar particles, which are considered as being identical by the theory of E. Majorana. The available experimental data support Dirac's neutrino theory but the methods used were not sensitive enough to state unequivocally that the neutrino and the antineutrino are not identical. A. Salam, L. Landau, T. D. Lee, and C. N. Yang developed simultaneously the 2component neutrino theory, according to which a given neutrino has only one spin state, in which the spin and the pulse are antiparallel, defining jointly the helicity of the neutrino. More recently, G. Danby et al., proved experimentally the existence of two types of neutrinos on the basis of the pi yields mu + gamma ' decay. (Review article, 16 references). (TTT)

• Research Organization: Eotvos Lorand Univ., Budapest
• NSA Number: NSA-18-010907
• OSTI ID: 4081895
• Journal Information: Fiz. Szemle, Journal Name: Fiz. Szemle Vol. Vol: 13
• Country of Publication: Country unknown/Code not available
• Language: Hungarian

Related Subjects

ANTINEUTRINOS
BETA DECAY
BIBLIOGRAPHY
DECAY
DIFFERENTIAL EQUATIONS
DIRAC EQUATIONS
ELECTRONS
EMISSION
ENERGY
ENERGY LEVELS
GAMMA RADIATION
HELICITY
MAGNETIC MOMENTS
MASS
MOMENTUM
MUONS
NEUTRINOS
PARTICLE MODELS
PHYSICS
PIONS
POSITRONS
PULSES
QUANTUM MECHANICS
RELATIVITY THEORY
SPECTRA
SPIN