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PROPERTIES OF $lambda$$sup 0$, THETA$sup 0$ AND $Sigma$$sup 0$ PARTICLES PRODUCED BY 1.1 BEV $pi$$sup -$ MESONS

Journal Article · · Intern. Conf. Mesons and Recently Discovered Particles e 43 Congr. naz. fis. Padua-Venice, 1957, Commun.
OSTI ID:4186041
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Results are presented of an analysis of pictures taken of a propane bubble chamber exposed to a momentum analazed 1.1 Bev pi /sup -/ meson beam from the Brookhaven Cosmotron. The total cross sections for production of LAMBDA / sup 0/- theta /sup 0/ particles and SIGMA /sup 0/- theta /sup 0/ particles are respectively- 0.24 plus or minus 0.04 mb and 0.14 plus or minus 0.04 mb. The probabilities, alpha LAMBDA and alpha theta , taat the LAMBDA /sup 0/ and theta /sup 0/ particles decay by their normal charged mode are alpha = 0.57 plus or minus 0.10 and alpha theta = 0.46 plus or minus 0.10. The angular distribution of decay products is consistent with spin 1/2 for the LAMBDA /sup 0/ particle and spin zero for the theta /sup 0/ particle. The results combined with the results of similar experiments at different energies indicate parity is not conserved in LAMBDA /sup 0/ decay. (auth)

Research Organization:
Univ. of Michigan, Ann Arbor
NSA Number:
NSA-14-009957
OSTI ID:
4186041
Journal Information:
Intern. Conf. Mesons and Recently Discovered Particles e 43 Congr. naz. fis. Padua-Venice, 1957, Commun., Journal Name: Intern. Conf. Mesons and Recently Discovered Particles e 43 Congr. naz. fis. Padua-Venice, 1957, Commun. Vol. Vol: I
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

ANGULAR DISTRIBUTION-- BUBBLE CHAMBERS-- DECAY-- KAONS- - LAMBDA NEUTRAL-- LAMBDA PARTICLES-- MEASURED VALUES-- PARITY-- PARTICLE TRACKS-- PROPANE-- SIGMA PARTICLES-- SIGMA-NEUTRAL-- SPIN-- THETA MESONS
BEAMS-- BUBBLE CHAMBERS-- COSMOTRONS-- CROSS SECTIONS-- GEV RANGE-- KAONS-- LAMBDA NEUTRAL-- LAMBDA PARTICLES-- MEASURED VALUES-- PIONS-- PIONS-MINUS-- PRODUCTION-- PROPANE-- SIGMA PARTICLES-- SIGMA-NEUTRAL-- SYNCHROTRONS-- THETA MESONS
PHYSICS