Measurement of the. Lambda. r arrow n +. gamma. branching ratio

Journal Article · Mon Jul 20 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.414· OSTI ID:7183683

Noble, A J; Larson, K D; Bassalleck, B; Fickinger, W J; Hall, J R; Hallin, A L; Hasinoff, M D; Horvath, D; Lowe, J; McIntyre, E K; Measday, D F; Miller, J P; Roberts, B L; Robinson, D K; Sakitt, M; Salomon, M; Waltham, C E; Warner, T M; Whitehouse, D A; Wolfe, D M ^[1]

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1. University of Birmingham; Birmingham; B15 2TT (United Kingdom) Boston University; Boston; Massachusetts 02215 (United States) University of British Columbia; Vancouver; British Columbia; V6T 1Z1 (Canada) Brookhaven National Laboratory; Upton; New York 11973 (United States) Case Western Reserve University; Cleveland; Ohio 44106 (United States) Central Research Institute for Physics of the Hungarian Academy of Sciences (KFKI); Budapest; H-1525 (Hungary) Los Alamos National Laboratory; Los Alamos; New Mexico 87545 (United States) University of New Mexico; Albuquerque; New Mexico 87131 (United States) Princeton University; Princeton; New Jersey 08544 (United States)

The branching ratio for the {Lambda} weak radiative decay has been measured to be {ital B}({Lambda}{r arrow}{ital n}+{gamma})/({Lambda}{r arrow}anything) =(1.78{plus minus}0.24(stat){plus minus}{sub 0.16}{sup 0.14}(syst)){times}10{sup {minus}3}. A low-energy kaon beam was used to produce the {Lambda} hyperons via the reaction {ital K}{sup {minus}}+{ital p}{r arrow}{Lambda}+{pi}{sup 0} at rest. Photons from the signal channel and {pi}{sup 0} decay were detected with a NaI(Tl) array. The final spectrum contains 287 events after background subtraction, an order of magnitude more events than from the only previous measurement.

• OSTI ID: 7183683
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:3; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

662360* -- Decays of Baryons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
BRANCHING RATIO
DATA
DATA ANALYSIS
DECAY
DETECTION
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INFORMATION
INTERACTIONS
KAON MINUS-PROTON INTERACTIONS
KAON-NUCLEON INTERACTIONS
KAON-PROTON INTERACTIONS
LAMBDA BARYONS
LAMBDA-1405 BARYONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
MONTE CARLO METHOD
NEUTRON DETECTION
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
RADIATION DETECTION
RADIATIVE DECAY
STRANGE PARTICLES