Nonleptonic charmed-baryon decays: Symmetry properties of parity-violating amplitudes

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.5787· OSTI ID:7006178

Zenczykowski, P ^[1]

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

We study the effects of pole-model-induced SU(4)-symmetry breaking in parity-violating amplitudes of Cabibbo-favored nonleptonic decays of charmed baryons. A simple technique generalizing the expressions of current algebra to the case of flavor symmetry breaking in the intermediate state is applied to sum the contributions from all intermediate excited 1/2[sup [minus]] baryons of a given charm. The technique permits easy discussion of departures from current algebra for any values of [Delta][ital c]/[Delta][omega] ([Delta][ital c] is the charm-noncharm mass difference, [Delta][omega] the 1/2[sup [minus]]-1/2[sup +] mass difference). We find that in the pole model the symmetry structure of parity-violating amplitudes of charmed-baryon decays into an octet baryon and an octet pseudoscalar meson consists of two pieces: (i) a term proportional to the standard current algebra expression but much smaller and of [ital opposite] sign and (ii) a term proportional to the factorization contribution, interfering with it destructively. The symmetry structure of parity-violating amplitudes for decays with vector meson production is also given. We apply the full pole model to the description of available data, compare it with the results of current algebra, and indicate places where a good discrimination between the pole model and current algebra should be possible.

• OSTI ID: 7006178
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:9; 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
AMPLITUDES
BARYONS
CHARM PARTICLES
CHARMED BARYONS
CURRENT ALGEBRA
DECAY
ELEMENTARY PARTICLES
FERMIONS
FLAVOR
HADRONIC PARTICLE DECAY
HADRONS
INVARIANCE PRINCIPLES
LIE GROUPS
MASS DIFFERENCE
ORGANOLEPTIC PROPERTIES
P INVARIANCE
PARTICLE DECAY
PARTICLE PROPERTIES
SU GROUPS
SU-4 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
VIOLATIONS