$Measurement of the b b fraction in hadronic Z decays$

Measurement of the b b fraction in hadronic Z decays

Using isolated leptons reconstructed in the Mark II detector to tag {ital b{bar b}} events, we measure the fraction of {ital b{bar b}} events in hadronic {ital Z}{sup 0} decays to be 0.23{sub {minus}0.09}{sup +0.11}, in good agreement with the standard-model prediction of 0.22. We find {Gamma}({ital...

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Veröffentlicht in:	Physical review letters 1990-03, Vol.64:11
Hauptverfasser:	Kral, J.F., Abrams, G.S., Adolphsen, C.E., Averill, D., Ballam, J., Barish, B.C., Barklow, T., Barnett, B.A., Bartelt, J., Bethke, S., Blockus, D., Bonvicini, G., Boyarski, A., Brabson, B., Breakstone, A., Bulos, F., Burchat, P.R., Burke, D.L., Cence, R.J., Chapman, J., Chmeissani, M., Cords, D., Coupal, D.P., Dauncey, P., DeStaebler, H.C., Dorfan, D.E., Dorfan, J.M., Drewer, D.C., Elia, R., Feldman, G.J., Fernandes, D., Field, R.C., Ford, W.T., Fordham, C., Frey, R., Fujino, D., Gan, K.K., Gatto, C., Gero, E., Gidal, G., Glanzman, T., Goldhaber, G., Gomez Cadenas, J.J., Gratta, G., Grindhammer, G., Grosse-Wiesmann, P., Hanson, G., Harr, R., Harral, B., Harris, F.A., Hawkes, C.M., Hayes, K., Hearty, C., Heusch, C.A., Hildreth, M.D., Himel, T., Hinshaw, D.A., Hong, S.J., Hutchinson, D., Hylen, J., Innes, W.R., Jacobsen, R.G., Jaros, J.A., Jung, C.K., Kadyk, J.A., Kent, J., King, M., Klein, S.R., Koetke, D.S., Komamiya, S., Koska, W., Kowalski, L.A., Kozanecki, W., Kuhlen, M., Labarga, L
Format:	Artikel
Sprache:	eng
Schlagworte:	645101 - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties 645102 - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties ANNIHILATION BASIC INTERACTIONS BOSONS DATA DECAY DIMENSIONS ELECTROMAGNETIC INTERACTIONS ELECTRON-POSITRON INTERACTIONS ELEMENTARY PARTICLES EXPERIMENTAL DATA FERMIONS HADRONIC PARTICLE DECAY INFORMATION INTERACTIONS INTERMEDIATE BOSONS INTERMEDIATE VECTOR BOSONS LEPTON-LEPTON INTERACTIONS LEPTONS LINEAR MOMENTUM MATHEMATICAL MODELS MONTE CARLO METHOD NUMERICAL DATA PARTICLE DECAY PARTICLE INTERACTIONS PARTICLE MODELS PHYSICS OF ELEMENTARY PARTICLES AND FIELDS STANDARD MODEL TRANSVERSE MOMENTUM UNIFIED GAUGE MODELS WIDTH Z NEUTRAL BOSONS
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Zusammenfassung:	Using isolated leptons reconstructed in the Mark II detector to tag {ital b{bar b}} events, we measure the fraction of {ital b{bar b}} events in hadronic {ital Z}{sup 0} decays to be 0.23{sub {minus}0.09}{sup +0.11}, in good agreement with the standard-model prediction of 0.22. We find {Gamma}({ital Z}{r arrow}{ital b{bar b}})=0.43{sup +0.21}{sub {minus}0.17} GeV.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.64.1211