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Experimental study of K/sup 0//sub L/. -->. pi. /sup +/. pi. /sup -/. gamma. and other rare decay modes. [Branching ratios, CP conservation, upper limits]

Journal Article · · Phys. Rev., D; (United States)
; ; ; ; ; ;
Using the SLAC K/sup 0//sub L/ spectrometer facility, we have measured the ratio (K/sup 0//sub L/ ..-->.. ..pi../sup +/..pi../sup -/..gamma..)/GAMMA (K/sup 0//sub L/ ..-->.. all) to be (6.2 +- 2.1) x 10/sup -5/. The ratio and Dalitz-plot distribution of 24 +- 10 events are consistent with CP conservation in this weak-electromagnetic decay. We have also set upper limits on various processes, as follows: GAMMA (K/sup 0//sub L/ ..-->.. ..mu../sup +/..mu../sup -/..gamma..) / GAMMA (K/sup 0//sub L/ ..-->.. all) < or = 7.8 x 10/sup -6/, 90% C.L.; GAMMA (K/sup 0//sub L/ ..-->.. ..mu../sup +/..mu../sup -/..pi../sup 0/)/GAMMA (K/sup 0//sub L/ ..-->.. all) < or = 5.7 x 10/sup -5/, 90% C.L.; GAMMA (K/sup 0//sub L/ ..-->.. ..pi../sup +/..pi../sup -/e/sup +/e/sup -/) / GAMMA (K/sup 0//sub L/ ..-->.. all) < or = 8.8 x 10/sup -6/, 90% C.L.; GAMMA (K/sup 0//sub L/ ..-->.. ..pi../sup 0/..pi../sup plus-or-minus/e/sup minus-or-plus/..nu..)/GAMMA (K/sup 0//sub L/ ..-->.. all) < or = 2.2 x 10/sup -3/, 90% C.L. (AIP)
Research Organization:
Physics Department and Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305
OSTI ID:
7130482
Journal Information:
Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 14:11; ISSN PRVDA
Country of Publication:
United States
Language:
English

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Related Subjects

645101* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Electromagnetic Interactions &amp; Properties
645102 -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
645302 -- High Energy Physics-- Particle Invariance Principles &amp; Symmetries-- Applications to Electromagnetic &amp; Weak Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
CURRENTS
DECAY
ELECTROMAGNETIC INTERACTIONS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INTERACTIONS
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
LEPTONS
LIMITING VALUES
MASSLESS PARTICLES
MESONS
MUONS
MUONS MINUS
MUONS PLUS
NEUTRAL CURRENTS
NEUTRINOS
PHOTONS
PIONS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
POSITRONS
PSEUDOSCALAR MESONS
STRANGE PARTICLES
WEAK INTERACTIONS
WEAK NEUTRAL CURRENTS