Measurement of the f/sub +/ form factor in K/sup 0//sub L/. -->. pi. /sup + -/e/sup - +/v decays using a large hydrogen bubble chamber
Journal Article
·
· Phys. Rev., D; (United States)
The decay K/sup 0//sub L/ ..-->.. ..pi..e..nu.. was studied in an experiment using the Argonne 12-ft bubble chamber exposed to a K/sup 0//sub L/ beam of momentum 550 +- 35 MeV/c. Use of the monochromatic beam and the large chamber volume allowed the selection of about 12 000 K/sup 0//sub e/3 events, containing a small ((5.3 +- 0.5) %) and well understood background from K/sup 0//sub mu3/ decay. The main feature of this experiment is the good acceptance over the Dalitz plot which minimizes possible systematic errors in the determination of the vector form factor f/sub +/(q/sup 2/). We find that the data are adequately described by a linear q/sup 2/ parameterization, f/sub +/(q/sup 2/) = f/sub +/(0)(1 + lambda/sub +/q/sup 2// m/sub ..pi..//sup 2/), with the slope parameter lambda/sub +/ = 0.028 +- 0.004 before radiative corrections are made. Direct application of radiative corrections, as calculated by Ginsberg, yields lambda/sub +/ = 0.025 +- 0.005. Our result is in good agreement with other recent experiments and with the assumption of K* (890) dominance.
- Research Organization:
- Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213
- OSTI ID:
- 7048257
- Journal Information:
- Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 18:3; ISSN PRVDA
- Country of Publication:
- United States
- Language:
- English
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·
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Related Subjects
645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BUBBLE CHAMBERS
CABIBBO ANGLE
DALITZ PLOT
DECAY
DIAGRAMS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FORM FACTORS
GAS TRACK DETECTORS
HADRONS
INVARIANCE PRINCIPLES
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MESONS
MEV RANGE
MEV RANGE 100-1000
NEUTRINOS
PARTICLE DECAY
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SCATTERPLOTS
SEMILEPTONIC DECAY
STRANGE PARTICLES
T INVARIANCE
WEAK PARTICLE DECAY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BUBBLE CHAMBERS
CABIBBO ANGLE
DALITZ PLOT
DECAY
DIAGRAMS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FORM FACTORS
GAS TRACK DETECTORS
HADRONS
INVARIANCE PRINCIPLES
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MESONS
MEV RANGE
MEV RANGE 100-1000
NEUTRINOS
PARTICLE DECAY
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SCATTERPLOTS
SEMILEPTONIC DECAY
STRANGE PARTICLES
T INVARIANCE
WEAK PARTICLE DECAY