### A CONTRIBUTION TO THE K$sup +$-DECAY STATISTICSA CONTRIBUTION TO THE K$sup +$-DECAY STATISTICS

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 Author Boggild, J. K. ♦ Hansen, K. H. ♦ Hooper, J. E. ♦ Scharff, M. ♦ Aditya, P. K. Source United States Department of Energy Office of Scientific and Technical Information Content type Text Language English
 Subject Keyword PHYSICS ♦ BRANCHING RATIO ♦ DECAY ♦ EMISSION ♦ KAONS ♦ KAONS-PLUS ♦ MUONS ♦ NUCLEAR EMULSIONS ♦ PIONS ♦ PIONS-PLUS ♦ SECONDARY EMISSION Abstract K/sup +/-decay events in a large block of emulsions were studied, mainly by following the charged secondaries to the ends of their ranges. Emphasis was placed on: (1) obtaining unbiassed information on the high-energy end of the spectrum of the K/sub mu //sub 3/ secondary; (2) a search for a decay mode K/sup +/ mu /sup +/ + mu /sup 0/; when combined with the results of earlier experiments the data were such that it should have been possible to detect the process if the branching ratio was greater than approx equal 5%; no positive evidence was found; (3) a search for pi /sup +/ secondaries of energy (53 to 61) Mev. Among 467 decay events tuere were no such secondaries. The branching ratios for the various decay modes were determined. Combining the data with those of previous experiments the following values were obtuined: B(K/sub mu // sub 2/) = (58.6 plus or minus 2.6)%; B(K/sub i/sub pi2/) = (21.7 plus or minus 2.5)%; B(K/sub pi //sub 3/)= (7.1 plus or minus 0.4)%; B(K'/sub pi3/) = (2.4 plus or minus 0.4)%; B(K/sub mm/) = (5.5 plus or minus 1.1)%; B(K/sub beta // sub 3/) = (4.7 plus or minus 1.1)%. The measured scanning efficiency in this experiment was 99%. (auth) ISSN 00296341 Educational Use Research Learning Resource Type Article Publisher Date 1961-02-16 Publisher Department Univ. of Copenhagen Journal Nuovo Cimento Volume Number 10 Issue Number 19 Organization Univ. of Copenhagen