Measurement of the branching ratio for the decay [eta][r arrow][mu][sup +][mu][sup [minus]]

Journal Article · Sun Feb 14 23:00:00 EST 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.892· OSTI ID:7060004

Kessler, R S; Abegg, R; Baldisseri, A; Boudard, A; Briscoe, W; Fabbro, B; Garcon, M; Hermes, E A; Jacobs, W W; Lytkin, L; Mayer, B; Nefkens, B M.K.; Niebuhr, C; Petrov, A M; Poitou, J; Saudinos, J; Tippens, B; Tomasi-Gustafsson, E; van der Schaaf, A; van Oers, W T.H. ; Vigdor, S E; Wang, M; White, D ^[1]

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1. Department of Physics; University of California at Los Angeles; Los Angeles; California; 90024 (United States) TRIUMF; 4004 Wesbrook Mall; Vancouver; British Columbia; V6T 2A3 (Canada) Service de Physique Nucleaire; Centre d'Etudes de Saclay; 91191 Gif-sur-Yvette (France) Center for Nuclear Studies Department of Physics; The George Washington University; Washington; D.C. 20052 (United States) Physik-Institut der Universitaet Zuerich; CH-8001 Zuerich (Switzerland) Laboratoire National Saturne; F-91191 Gif-sur-Yvette (France) Indiana University Cyclotron Facility; 2401 Milo B. Sampson Lane; Bloomington; Indiana 47405 (United States) Joint Institute for Nuclear Research;

The branching ratio ([ital B]) for [eta][r arrow][mu][sup +][mu][sup [minus]] has been measured at the SATURNE tagged-[eta] facility using the reaction [ital pd][r arrow][sup 3]He [eta] as a source of [similar to]10[sup 8] tagged [eta]'s per day. A sample of 100 [eta][r arrow][mu][sup +][mu][sup [minus]] decays on a background of 8 events yield [ital B]([eta][r arrow][mu][sup +][mu][sup [minus]]) =[5.6[sub [minus]0.7][sup +0.6](stat)[plus minus]0.5(syst)][times]10[sup [minus]6]. This value is 1.3[plus minus]0.2 times the unitarity (lower) bound of 4.3[times]10[sup [minus]6], in agreement with most quark and vector meson dominance model predictions.

• OSTI ID: 7060004
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:7; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
CALCULATION METHODS
CHARGED PARTICLE DETECTION
COMPOSITE MODELS
DATA
DECAY
DETECTION
ELEMENTARY PARTICLES
ETA MESONS
EXPERIMENTAL DATA
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
LEPTONIC DECAY
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
MONTE CARLO METHOD
MUON DETECTION
NUCLEON-DEUTERON INTERACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PROTON-DEUTERON INTERACTIONS
PSEUDOSCALAR MESONS
QUARK MODEL
RADIATION DETECTION
RADIATIVE DECAY
RESOLUTION
SPECTROMETERS
TIME RESOLUTION
TIMING PROPERTIES
VECTOR DOMINANCE MODEL
WEAK INTERACTIONS
WEAK PARTICLE DECAY