A measurement of the branching ratio of the weak radiative hyperon decay. Xi. sup 0 yields. Lambda. gamma

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5093594

James, C C

The branching ratio {Xi}{sup 0} {yields} {Lambda}{gamma}/{Xi}{sup 0} {yields}{pi}{sup 0} has been measured at the Fermilab National Accelerator Laboratory neutral hyperon facility. 30,000 {Xi}{sup 0} {yields} {Lambda}{pi}{sup 0} decays were detected by identifying the subsequent {Lambda} {yields} p{pi}{sup {minus}} and {pi}{sup 0} {yields} {gamma}{gamma} decays in a multiwire proportional chamber magnetic spectrometer and an array of lead glass. A sample of 6.7 {times} 10{sup 5} {Lambda} + {gamma} events were analyzed for {Xi}{sup 0} {yields} {Lambda}{gamma} decays. A sample of 139 {plus minus} 12 {Xi}{sup 0} {yields} {Lambda}{gamma} decays were identified. Monte Carlo studies gave the relative acceptances of the two decay types in the apparatus, and in turn the branching ratio. The branching ratio is 1.27 {plus minus} 0.11 {times} 10{sup {minus}3}, with a possible systematic error of {plus minus} 0.22 {times} 10{sup {minus}3}.

• Research Organization: Minnesota Univ., Minneapolis, MN (USA)
• OSTI ID: 5093594
• Country of Publication: United States
• Language: English

Related Subjects

645100* -- High Energy Physics-- Particle Interactions & Properties-Experimental
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
BARYON REACTIONS
BRANCHING RATIO
CYCLIC ACCELERATORS
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
FERMILAB ACCELERATOR
HADRON REACTIONS
HYPERON REACTIONS
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
NUCLEAR REACTIONS
NUMERICAL DATA
SYNCHROTRONS