Search for the decay. pi. sup 0 r arrow. gamma. + X

Journal Article · Mon Aug 03 00:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.733· OSTI ID:7157672

Atiya, M S; Chiang, I; Frank, J S; Haggerty, J S; Ito, M M; Kycia, T F; Li, K K; Littenberg, L S; Stevens, A J; Sambamurti, A; Strand, R C ^[1]; Louis, W C ^[2]; Akerib, D S; Marlow, D R; Meyers, P D; Selen, M A; Shoemaker, F C; Smith, A J.S. ^[3]; Blackmore, E W; Bryman, D A ; Felawka, L; Kitching, P; Konaka, A; Kuno, Y; Macdonald, J A; Numao, T; Padley, P; Poutissou, J; Poutissou, R; Roy, J; Turcot, A S ^[4]

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1. Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Medium Energy Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States)
4. TRIUMF, Vancouver, British Columbia, V6T2A3 (Canada)

A search for the decay {pi}{sup 0}{r arrow}{gamma}{ital X}, where {ital X} is any long-lived weakly interacting neutral vector particle with mass smaller than the neutral pion pass, was performed using neutral pions tagged by {ital K}{sup +}{r arrow}{pi}{sup +}{pi}{sup 0}. A 90%-C.L. upper limit for the branching ratio of the two-body decay {ital B}({pi}{sup 0}{r arrow}{gamma}{ital X}){lt}5{times}10{sup {minus}4} is set. Limits are also set for three-body decays {pi}{sup 0}{r arrow}{gamma}{ital XX}{prime}.

• DOE Contract Number: AC02-76CH00016; W-7405-ENG-36; AC02-76ER03072
• OSTI ID: 7157672
• Journal Information: Physical Review Letters; (United States), Vol. 69:5; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PIONS NEUTRAL
RADIATIVE DECAY
BRANCHING RATIO
EXPERIMENTAL DATA
GAMMA DETECTION
LIMITING VALUES
MASS
MEV RANGE 10-100
MONTE CARLO METHOD
POSTULATED PARTICLES
RESOLUTION
BOSONS
DATA
DECAY
DETECTION
ELEMENTARY PARTICLES
ENERGY RANGE
HADRONS
INFORMATION
MESONS
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NUMERICAL DATA
PARTICLE DECAY
PIONS
PSEUDOSCALAR MESONS
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662350* - Decays of Mesons- (1992-)
662440 - Properties of Other Particles Including Hypothetical Particles- (1992-)