Measurement of alignment--positron-momentum correlation in /sup 12/N. -->. /sup 12/C(g. s. ) by the spontaneous-level-mixing technique: Improved evidence against a second-class axial current

Journal Article · Mon Jul 31 04:00:00 EDT 1978 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.41.299· OSTI ID:6731060

Braendle, H; Miklos, G; Ph, L Roesch; Telegdi, V L; Truttmann, P; Zehnder, A; Grenacs, L; Lebrun, P; Lehmann, J

The coefficient ..cap alpha../sub +/ of the alignment--positron-momentum correlation in the decay /sup 12/N ..-->.. C(g.s.) has been determined using the technique of spontaneous level mixing. We find ..cap alpha../sub +/ = -2.73(39)/GeV; this agrees with the revised result of Sugimoto et al. The two coefficients ..cap alpha../sub plus-or-minus/ jointly yield (assuming strong conservation of vector current (CVC)) F/sub E//sup(/sup 2/) F/sub A/ = -0.13(48)/2M, i.e., provide strong evidence against a second-class axial current in a model-independent way. Conversely, assuming F/sub E//sup(/sup 2/) equivalent 0 yields F/sub M//F/sub A/ = 3.93(48)/2M, in excellent agreement with the CVC prediction.

• Research Organization: Laboratory for Nuclear Physics, Swiss Federal Institute of Technology, 8093 Zurich, Switzerland
• OSTI ID: 6731060
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 41:5; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

651322* -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALGEBRAIC CURRENTS
ANGULAR CORRELATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
CARBON 12
CARBON ISOTOPES
CORRELATIONS
CURRENTS
DECAY
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
FUNCTIONS
INTERACTIONS
ISOTOPES
LEGENDRE POLYNOMIALS
LEPTONIC DECAY
LEPTONS
LIGHT NUCLEI
MIRROR NUCLEI
NITROGEN 12
NITROGEN ISOTOPES
NUCLEI
ODD-ODD NUCLEI
PARTICLE DECAY
POLARIZED NUCLEI
POLYNOMIALS
POSITRONS
RADIOISOTOPES
SECOND-CLASS CURRENTS
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
WEAK INTERACTIONS
WEAK PARTICLE DECAY