Measurement of the K/sup +//sub mu3/ decay spectrum and form factors

Journal Article · Fri Feb 01 04:00:00 EST 1980 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.21.652· OSTI ID:5534821

Whitman, R; Abrams, R J; Carroll, A S; Kycia, T F; Li, K K; Michael, D N; Mockett, P M; Rubinstein, R; Wattenberg, A

The Dalitz-plot density of a sample of 3973 K/sup +//sub mu3/ decays in flight at 1.8 GeV/c (K/sup +/ ..-->.. ..pi../sup 0/..mu../sup +/..nu../sub ..mu../) was studied to determine lambda/sub +/ and lambda/sub 0/, the linear coefficients of the t dependence of the vector and scalar form factors, where t is the four-momentum transfer to the lepton pair. The ..mu../sup +/ was detected by scintillator hodoscopes, identified by thick-plate optical spark chambers and momentum analyzed in a magnetic spectrometer. The ..pi../sup 0/ was detected by its decay into two ..gamma..'s which converted in a lead--optical-spark-chamber--scintillator sandwich detector. The measured coefficients were lambda/sub +/=0.050 +- 0.013 and lambda/sub 0/=0.029 +- 0.011. The chi/sup 2/ of the fit was 63 for 57 degrees of freedom.

• Research Organization: University of Illinois at Chicago Circle, Chicago, Illinois 60680
• OSTI ID: 5534821
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 21:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
BRANCHING RATIO
CP INVARIANCE
DALITZ PLOT
DECAY
DIAGRAMS
ELEMENTARY PARTICLES
FERMIONS
FORM FACTORS
GAS TRACK DETECTORS
HADRONS
HODOSCOPES
INVARIANCE PRINCIPLES
KAONS
KAONS PLUS
LEPTONS
MAGNETIC SPECTROMETERS
MATRIX ELEMENTS
MEASURING INSTRUMENTS
MESONS
MUONS
MUONS PLUS
PARTICLE DECAY
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SCATTERPLOTS
SCINTILLATION COUNTERS
SEMILEPTONIC DECAY
SPARK CHAMBERS
SPECTROMETERS
STRANGE PARTICLES
WEAK PARTICLE DECAY