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Titolo:
Charged multiplicities in Z decays into u, d, and s Quarks
Autore:
Abbiendi, G; Ainsley, C; Akesson, PF; Alexander, G; Allison, J; Anagnostou, G; Anderson, KJ; Arcelli, S; Asai, S; Axen, D; Azuelos, G; Bailey, I; Ball, AH; Barberio, E; Barlow, RJ; Behnke, T; Bell, KW; Bella, G; Bellerive, A; Benelli, G; Bentvelsen, S; Bethke, S; Biebel, O; Bloodworth, IJ; Boeriu, O; Bock, P; Bohme, J; Bonacorsi, D; Boutemeur, M; Braibant, S; Bright-Thomas, P; Brigliadori, L; Brown, RM; Burckhart, HJ; Cammin, J; Capiluppi, P; Carnegie, RK; Caron, B; Carter, AA; Carter, JR; Chang, CY; Charlton, DG; Clarke, PEL; Clay, E; Cohen, I; Cooke, OC; Couchman, J; Coxe, RL; Csilling, A; Cuffiani, M; Dado, S; Dallavalle, GM; Dallison, S; De Roeck, A; De Wolf, EA; Dervan, P; Desch, K; Dienes, B; Dixit, MS; Donkers, M; Dubbert, J; Duchovni, E; Duckeck, G; Duerdoth, IP; Estabrooks, PG; Etzion, E; Fabbri, F; Fanti, M; Feld, L; Ferrari, P; Fiedler, F; Fleck, I; Ford, M; Frey, A; Furtjes, A; Futyan, DI; Gagnon, P; Gary, JW; Gaycken, G; Geich-Gimbel, C; Giacomelli, G; Giacomelli, P; Glenzinski, D; Goldberg, J; Grandi, C; Graham, K; Gross, E; Grunhaus, J; Gruwe, M; Gunther, PO; Hajdu, C; Hanson, GG; Harder, K; Harel, A; Harin-Dirac, M; Hauschild, M; Hawkes, CM; Hawkings, R; Hemingway, RJ; Hensel, C; Herten, G; Heuer, RD; Hill, JC; Hocker, A; Hoffman, K; Homer, RJ; Honma, AK; Horvath, D; Hossain, KR; Howard, R; Huntemeyer, P; Igo-Kemenes, P; Ishii, K; Jacob, FR; Jawahery, A; Jeremie, H; Jones, CR; Jovanovic, P; Junk, TR; Kanaya, N; Kanzaki, J; Karapentian, G; Karlen, D; Kartvelishvili, V; Kawagoe, K; Kawamoto, T; Keeler, RK; Kellogg, RG; Kennedy, BW; Kim, DH; Klein, K; Klier, A; Kluth, S; Kobayashi, T; Kobel, M; Kokott, TP; Komamiya, S; Kowalewski, RV; Kress, T; Krieger, P; von Krogh, J; Krop, D; Kuhl, T; Kupper, M; Kyberd, P; Lafferty, GD; Landsman, H; Lanske, D; Lawson, I; Layter, JG; Leins, A; Lellouch, D; Letts, J; Levinson, L; Liebisch, R; Lillich, J; Littlewood, C; Lloyd, AW; Lloyd, SL; Loebinger, FK; Long, GD; Losty, MJ; Lu, J; Ludwig, J; Macchiolo, A; Macpherson, A; Mader, W; Marcellini, S; Marchant, TE; Martin, AJ; Martin, JP; Martinez, G; Mashimo, T; Mattig, P; McDonald, WJ; Mes, H; Michelini, A; Mihara, S; Mikenberg, G; Miller, DJ; Mohr, W; Montanari, A; Mori, T; Nagai, K; Nakamura, I; Neal, HA; Nisius, R; ONeale, SW; Oakham, FG; Odorici, F; Oh, A; Okpara, A; Oreglia, MJ; Orito, S; Pasztor, G; Pater, JR; Patrick, GN; Pfeifenschneider, P; Pilcher, JE; Pinfold, J; Plane, DE; Poli, B; Polok, J; Pooth, O; Przybycien, M; Quadt, A; Rabbertz, K; Rembser, C; Renkel, PO; Rick, H; Rodning, N; Roney, JM; Rosati, S; Roscoe, K; Rossi, AM; Rozen, Y; Runge, K; Runolfsson, O; Rust, DR; Sachs, K; Saeki, T; Sahr, O; Sarkisyan, EKG; Sbarra, C; Schaile, AD; Schaile, O; Scharff-Hansen, P; Schroder, M; Schumacher, M; Schwick, C; Scott, WG; Seuster, R; Shears, TG; Shen, BC; Shepherd-Themistocleous, CH; Sherwood, P; Siroli, GP; Skuja, A; Smith, AM; Sobie, R; Soldner-Rembold, S; Spagnolo, S; Sproston, M; Stahl, A; Stephens, K; Stoll, K; Strom, D; Strohmer, R; Stumpf, L; Surrow, B; Talbot, SD; Tarem, S; Taylor, RJ; Teuscher, R; Thomas, J; Thomson, MA; Tonnesmann, M; Torrence, E; Towers, S; Toya, D; Trefzger, T; Trigger, I; Trocsanyi, Z; Tsur, E; Turner-Watson, MF; Ueda, I; Vachon, B; Vannerem, P; Verzocchi, M; Voss, H; Vossebeld, J; Waller, D; Ward, CP; Ward, DR; Watkins, PM; Watson, NK; Wells, PS; Wengler, T; Wermes, N; Wetterling, D; White, JS; Wilson, GW; Wilson, JA; Wyatt, TR; Yamashita, S; Zacek, V; Zer-Zion, D;
Indirizzi:
Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy Univ Bologna Bologna Italy I-40126 artimento Fis, I-40126 Bologna, Italy Ist Nazl Fis Nucl, I-40126 Bologna, Italy Ist Nazl Fis Nucl Bologna Italy I-40126 Fis Nucl, I-40126 Bologna, Italy Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England Univ Birmingham Birmingham W Midlands England B15 2TT W Midlands, England Univ Bonn, Inst Phys, D-53115 Bonn, Germany Univ Bonn Bonn Germany D-53115 iv Bonn, Inst Phys, D-53115 Bonn, Germany Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA Univ Calif Riverside Riverside CA USA 92521 Phys, Riverside, CA 92521 USA Cavendish Lab, Cambridge CB3 0HE, England Cavendish Lab Cambridge England CB3 0HE Lab, Cambridge CB3 0HE, England Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada Carleton Univ Ottawa ON Canada K1S 5B6 t Phys, Ottawa, ON K1S 5B6, Canada Carleton Univ, Ctr Res Particle Phys, Ottawa, ON K1S 5B6, Canada Carleton Univ Ottawa ON Canada K1S 5B6 e Phys, Ottawa, ON K1S 5B6, Canada CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland CERN Geneva Switzerland 23 Org Nucl Res, CH-1211 Geneva 23, Switzerland Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA Univ Chicago Chicago IL USA 60637 nrico Fermi Inst, Chicago, IL 60637 USA Univ Chicago, Dept Phys, Chicago, IL 60637 USA Univ Chicago Chicago IL USA 60637 icago, Dept Phys, Chicago, IL 60637 USA Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany Univ Freiburg Freiburg Germany D-79104 k Phys, D-79104 Freiburg, Germany Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany Univ Heidelberg Heidelberg Germany D-69120 , D-69120 Heidelberg, Germany Indiana Univ, Dept Phys, Bloomington, IN 47405 USA Indiana Univ Bloomington IN USA 47405 ept Phys, Bloomington, IN 47405 USA Univ London Queen Mary & Westfield Coll, London E1 4NS, England Univ London Queen Mary & Westfield Coll London England E1 4NS S, England Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany Rhein Westfal TH Aachen Aachen Germany D-52056 , D-52056 Aachen, Germany Univ Coll London, London WC1E 6BT, England Univ Coll London London England WC1E 6BT ondon, London WC1E 6BT, England Univ Manchester, Dept Phys, Schuster Lab, Manchester M13 9PL, Lancs, England Univ Manchester Manchester Lancs England M13 9PL M13 9PL, Lancs, England Univ Maryland, Dept Phys, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 Dept Phys, College Pk, MD 20742 USA Univ Montreal, Phys Nucl Lab, Montreal, PQ H3C 3J7, Canada Univ Montreal Montreal PQ Canada H3C 3J7 ab, Montreal, PQ H3C 3J7, Canada Univ Oregon, Dept Phys, Eugene, OR 97403 USA Univ Oregon Eugene OR USA 97403 v Oregon, Dept Phys, Eugene, OR 97403 USA Rutherford Appleton Lab, CLRC, Didcot OX11 0QX, Oxon, England Rutherford Appleton Lab Didcot Oxon England OX11 0QX 1 0QX, Oxon, England Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel Technion Israel Inst Technol Haifa Israel IL-32000 L-32000 Haifa, Israel Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, Israel Tel Aviv Univ Tel Aviv Israel IL-69978 Astron, IL-69978 Tel Aviv, Israel Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 1130033, Japan Univ Tokyo Tokyo Japan 1130033 ntary Particle Phys, Tokyo 1130033, Japan Kobe Univ, Kobe, Hyogo 6578501, Japan Kobe Univ Kobe Hyogo Japan 6578501Kobe Univ, Kobe, Hyogo 6578501, Japan Weizmann Inst Sci, Particle Phys Dept, IL-76100 Rehovot, Israel Weizmann Inst Sci Rehovot Israel IL-76100 Dept, IL-76100 Rehovot, Israel Univ Hamburg, DESY, Inst Expt Phys 2, D-22607 Hamburg, Germany Univ Hamburg Hamburg Germany D-22607 pt Phys 2, D-22607 Hamburg, Germany Univ Victoria, Dept Phys, Victoria, BC V8W 3P6, Canada Univ Victoria Victoria BC Canada V8W 3P6 ys, Victoria, BC V8W 3P6, Canada Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada Univ British Columbia Vancouver BC Canada V6T 1Z1 ver, BC V6T 1Z1, Canada Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada Univ Alberta Edmonton AB Canada T6G 2J1 hys, Edmonton, AB T6G 2J1, Canada Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary Res Inst Particle & Nucl Phys Budapest Hungary H-1525 Budapest, Hungary Inst Nucl Res, H-4001 Debrecen, Hungary Inst Nucl Res Debrecen Hungary H-4001 Nucl Res, H-4001 Debrecen, Hungary Univ Munich, Sekt Phys, D-85748 Garching, Germany Univ Munich Garching Germany D-85748 ekt Phys, D-85748 Garching, Germany Max Planck Inst Phys, D-80805 Munich, Germany Max Planck Inst Phys Munich Germany D-80805 hys, D-80805 Munich, Germany Yale Univ, Dept Phys, New Haven, CT 06520 USA Yale Univ New Haven CT USA 06520 Univ, Dept Phys, New Haven, CT 06520 USA TRIUMF, Vancouver, BC V6T 2A3, Canada TRIUMF Vancouver BC Canada V6T 2A3TRIUMF, Vancouver, BC V6T 2A3, Canada Univ Min & Met, Krakow, Poland Univ Min & Met Krakow PolandUniv Min & Met, Krakow, Poland Lajos Kossuth Univ, Dept Expt Phys, Debrecen, Hungary Lajos Kossuth Univ Debrecen Hungary , Dept Expt Phys, Debrecen, Hungary MPI, Munich, Germany MPI Munich GermanyMPI, Munich, Germany Max Planck Inst Phys, D-80805 Munich, Germany Max Planck Inst Phys Munich Germany D-80805 hys, D-80805 Munich, Germany Univ Calif Riverside, High Energy Phys Grp, Riverside, CA 92521 USA Univ Calif Riverside Riverside CA USA 92521 Grp, Riverside, CA 92521 USA CERN, Div EP, CH-1211 Geneva 23, Switzerland CERN Geneva Switzerland 23CERN, Div EP, CH-1211 Geneva 23, Switzerland Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel Tel Aviv UnivTel Aviv Israel IL-69978 Astron, IL-69978 Tel Aviv, Israel
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL C
fascicolo: 2, volume: 19, anno: 2001,
pagine: 257 - 268
SICI:
1434-6044(200102)19:2<257:CMIZDI>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
FERMION PAIR PRODUCTION; FLAVOR INDEPENDENCE; Z(0)->B(B)OVER-BAR EVENTS; FRAGMENTATION FUNCTIONS; ELECTROWEAK COUPLINGS; E+E ANNIHILATION; QED CORRECTIONS; Z(0) RESONANCE; LIGHT FLAVORS; B-QUARKS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Abbiendi, G Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy Univ Bologna Bologna Italy I-40126 s, I-40126 Bologna, Italy
Citazione:
G. Abbiendi et al., "Charged multiplicities in Z decays into u, d, and s Quarks", EUR PHY J C, 19(2), 2001, pp. 257-268

Abstract

About 4.4 million hadronic decays of Z bosons, recorded by the OPAL detector at LEP at a centre-of-mass energy of around roots = 91.2 GeV, are used to determine the mean charged particle multiplicities for the three light quark flavours. Events from primary u, d, and s quarks are tagged by selecting characteristic particles which carry a large fraction of the beam energy. The charged particle multiplicities are measured in the hemispheres opposite to these particles. An unfolding procedure is applied to obtain these multiplicities for each primary light quark flavour. This yields[n(u)] = 17.77 +/- 0.51(-1.20)(+0.86), [n(d)] = 21.44 +/- 0.63(-1.17)(+1.46), [n(s)] = 20.02 +/- 0.13(-0.37)(+0.39),where statistical and systematic errors are given. The results for [n(u)] and [n(d)] are almost fully statistically anti-correlated. Within the errors the result is consistent with the flavour independence of the strong interaction for the particle multiplicities in events from the light up, down, and strange quarks.

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Documento generato il 06/04/20 alle ore 21:51:37