Measurement of the charged multiplicity of events containing bottom hadrons at E sub c. m. =91 GeV

Journal Article · Wed Jul 01 00:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.453· OSTI ID:7235361

Schumm, B A; Koetke, D S; Adolphsen, C E; Alexander, J P; Averill, D; Barish, B C; Barklow, T; Barnett, B A; Blockus, D; 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, J M; Drell, P S; Drewer, D C; Durrett, D; Elia, R; Feldman, G J; Field, R C; Ford, W T; Fordham, C; Frey, R; Fujino, D; Gan, K K; Gero, E; Gidal, G; Glanzman, T; Goldhaber, G; Gomez Cadenas, J J; Gratta, G; Hanson, G; Harr, R; Harral, B; Harris, F A; 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; Kenney, C; King, M; Komamiya, S; Kowalski, L A; Kral, J F; Kuhlen, M; Labarga, L; Lankford, A J; Le Diberder, F; Levi, M E; Litke, A M; Lou, X C; Lueth, V; McKenna, J A; Matthews, J A.J.; Mattison, T; Moffeit,

Using an impact-parameter tag to select an enriched sample of {ital Z}{sup 0}{r arrow}{ital b{bar b}} events, we have measured the difference between the average charged multiplicity of {ital b{bar b}} and all hadronic {ital Z}{sup 0} decays to be 2.1{plus minus}1.8(stat){plus minus}0.6(syst) tracks per event. The resulting total (nonleading) charged multiplicity for {ital Z}{sup 0}{r arrow}{ital b{bar b}} events is 23.1(12.0){plus minus}1.8{plus minus}0.6 tracks. A comparison of this nonleading multiplicity to hadronic multiplicity data in the range of 10 to 60 GeV supports the hypothesis of flavor-independent hadronic fragmentation, and yields a measurement of the average energy fraction of bottom hadrons in {ital Z}{sup 0} decays of {l angle}{ital x}{sub {ital E}}{r angle}{sub {ital b}}=0.62{plus minus}0.10{plus minus}0.04.

• OSTI ID: 7235361
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 46:1; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BEAUTY PARTICLES
PARTICLE PRODUCTION
Z NEUTRAL BOSONS
HADRONIC PARTICLE DECAY
CHARGED PARTICLES
DRIFT CHAMBERS
FLAVOR MODEL
FRAGMENTATION
GEV RANGE 10-100
IMPACT PARAMETER
MULTIPLICITY
QUANTUM CHROMODYNAMICS
QUARKS
STANFORD LINEAR COLLIDER
ACCELERATOR FACILITIES
ACCELERATORS
BOSONS
COMPOSITE MODELS
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
GEV RANGE
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LINEAR ACCELERATORS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
PARTICLE DECAY
PARTICLE MODELS
POSTULATED PARTICLES
PROPORTIONAL COUNTERS
QUANTUM FIELD THEORY
QUARK MODEL
RADIATION DETECTORS
662380* - Decays of Intermediate Bosons- (1992-)
662230 - Quantum Chromodynamics- (1992-)