Weak hyperon decays: Quark sea and SU(3) symmetry breaking

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.3285· OSTI ID:6999487

Zenczykowski, P ^[1]

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1. Department of Theoretical Physics, H. Niewodniczanski Institute of Nuclear Physics, Radzikowskiego 152, Krakow (Poland)

An explanation of the difference in the values of the apparent [ital f]/[ital d] ratios for the [ital S]- and [ital P]-wave amplitudes of nonleptonic hyperon decays is proposed. The argument is formulated in the framework of the standard pole model with (56,0[sup +]) ground-state and (70,1[sup [minus]]) excited baryons as intermediate states for the [ital P] and [ital S] waves, respectively. Under the assumption that the dominant part of the deviation of ([ital f]/[ital d])[sub [ital P]][sub wave] from [minus]1 is due to large quark sea effects, SU(3) symmetry breaking in energy denominators is shown to lead to a prediction for ([ital f]/[ital d])[sub [ital S]] wave which is in excellent agreement with experiment. This corroborates our previous unitarity calculations which indicated that the matrix elements [l angle][ital B][vert bar][ital H][sub weak][sup PC][vert bar][ital B][prime][r angle] of the parity-conserving weak Hamiltonian between the ground-state baryons are characterized by [ital f][sub 0]/[ital d][sub 0][approx][minus]1.6 or more. A brief discussion of the problem of the relative size of [ital S]- and [ital P]-wave amplitudes is given. Finally, implications for weak radiative hyperon decays are also discussed.

• OSTI ID: 6999487
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:5; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662360* -- Decays of Baryons-- (1992-)
662410 -- Properties of Baryons & Baryon Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
DECAY
ELEMENTARY PARTICLES
ENERGY LEVELS
FERMIONS
GROUND STATES
HADRONS
HYPERONS
INVARIANCE PRINCIPLES
LIE GROUPS
MATRIX ELEMENTS
P INVARIANCE
P WAVES
PARTIAL WAVES
PARTICLE DECAY
POSTULATED PARTICLES
QUARKS
RADIATIVE DECAY
S WAVES
STRANGE PARTICLES
SU GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY