Radiative kaon decays [ital K][sup [plus minus]][r arrow][pi][sup [plus minus]][pi][sup 0][gamma] and direct [ital CP] violation
Journal Article
·
· Physical Review, D (Particles Fields); (United States)
- Institute of Physics, Academia Sinica, Taipei, Taiwan 11529 (Taiwan, Province of China) Institute for Theoretical Physics, State University of New York, Stony Brook, New York 11794 (United States)
It is stressed that a measurement of the electric dipole amplitude for direct photon emission in [ital K][sup [plus minus]][r arrow][pi][sup [plus minus]][pi][sup 0][gamma] decays through its interference with inner bremsstrahlung is important for differentiating among various models. The effects of amplitude [ital CP] violation in the radiative decays of the charged kaon are analyzed in the standard model in conjunction with the large-[ital N][sub [ital c]] approach. We point out that gluon and electromagnetic penguin contributions to the [ital CP]-violating asymmetry between the Dalitz plots of [ital K][sup [plus minus]][r arrow][pi][sup [plus minus]][pi][sup 0][gamma] are of equal weight. The magnitude of [ital CP] asymmetry ranges from 2[times]10[sup [minus]6] to 1[times]10[sup [minus]5] when the photon energy in the kaon rest frame varies from 50 MeV to 170 MeV.
- OSTI ID:
- 5019496
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 49:7; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Analysis of the decay [ital K][sub [ital L]][r arrow][pi][sup 0][gamma][gamma] and expectations for the decays [ital K][sub [ital L]][r arrow][pi][sup 0][ital e+][ital e[minus]] and [ital K][sub [ital L]][r arrow][pi][sup 0][mu][sup +][mu][sup [minus]]
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Related Subjects
662120* -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662390 -- Electromagnetic Processes & Properties-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CP INVARIANCE
DALITZ PLOT
DECAY
DIAGRAMS
DIPOLES
ELECTRIC DIPOLES
ELEMENTARY PARTICLES
HADRONS
INVARIANCE PRINCIPLES
KAONS
KAONS MINUS
KAONS PLUS
MESONS
MULTIPOLES
PARTICLE DECAY
PIONS
PSEUDOSCALAR MESONS
RADIATIVE DECAY
SCATTERPLOTS
STRANGE MESONS
STRANGE PARTICLES
VIOLATIONS
Conservation Laws
Currents & Their Properties-- (1992-)
662390 -- Electromagnetic Processes & Properties-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CP INVARIANCE
DALITZ PLOT
DECAY
DIAGRAMS
DIPOLES
ELECTRIC DIPOLES
ELEMENTARY PARTICLES
HADRONS
INVARIANCE PRINCIPLES
KAONS
KAONS MINUS
KAONS PLUS
MESONS
MULTIPOLES
PARTICLE DECAY
PIONS
PSEUDOSCALAR MESONS
RADIATIVE DECAY
SCATTERPLOTS
STRANGE MESONS
STRANGE PARTICLES
VIOLATIONS