Weak decays of 1/2/sup +/ and 3/2/sup +/ baryons in SU(4) dynamical scheme

Journal Article · Wed Jul 01 04:00:00 EDT 1981 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.24.117· OSTI ID:6382371

Kanwar, S; Verma, R C; Khanna, M P

Two-body weak decays of baryons are studied in a simple SU(4) dynamical scheme. Expressing the decay amplitudes in terms of eigenamplitudes in s, t, and u channels and assuming that the nonexotic intermediate states contribute dominantly, we find that the Glashow-Iliopoulos-Maiani weak Hamiltonian vanishes for the parity-violating (PV) decay mode. Starting with the most general weak Hamiltonian (15x15), we then obtain 15 dominance for the PV mode of uncharmed baryons including ..cap omega../sup -/, whereas the charmed-hadron decays occur through 15/sub A/, 45/sub A/, 45(/sub A/. For the parity-conserving mode, we obtain 20'' dominance of the weak Hamiltonian. However, uncharmed-baryon decays demand a 15/sub S/ admixture. We predict null asymmetry for B(3)..-->..B(3*)+P(8), B(3)..-->..B(6)+P(8), B(3)..-->..D(10)+P(3*), B(3)..-->..B(8)+P(3*), and B(3*)..-->..D(10)+P(8), and for ..cap omega../sup asterisk++//sub 3/ decays. We also notice that only ..pi../sup +//rho/sup +/-emitting decays are allowed in the PV mode.

• Research Organization: Department of Physics, Panjab University, Chandigarh 160014, India
• OSTI ID: 6382371
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 24:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BASIC INTERACTIONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
HAMILTONIANS
INTERACTIONS
INVARIANCE PRINCIPLES
LIE GROUPS
MATHEMATICAL OPERATORS
MATRIX ELEMENTS
P INVARIANCE
PARTICLE DECAY
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUANTUM OPERATORS
SU GROUPS
SU-3 GROUPS
SU-4 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
WEAK HADRONIC DECAY
WEAK INTERACTIONS
WEAK PARTICLE DECAY