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Titolo:
Measurement of the B+ and B-0 lifetimes and search for CP(T) violation using reconstructed secondary vertices
Autore:
Abbiendi, G; Ackerstaff, K; Alexander, G; Allison, J; Altekamp, N; Anderson, KJ; Anderson, S; Arcelli, S; Asai, S; Ashby, SF; Axen, D; Azuelos, G; Ball, AH; Barberio, E; Barlow, RJ; Bartoldus, R; Batley, JR; Baumann, S; Bechtluft, J; Behnke, T; Bell, KW; Bella, G; Bellerive, A; Bentvelsen, S; Bethke, S; Betts, S; Biebel, O; Biguzzi, A; Bird, SD; Blobel, V; Bloodworth, IJ; Bock, P; Bohme, J; Bonacorsi, D; Boutemeur, M; Braibant, S; Bright-Thomas, P; Brigliadori, L; Brown, RM; Burckhart, HJ; Capiluppi, P; Carnegie, RK; Carter, AA; Carter, JR; Chang, CY; Charlton, DG; Chrisman, D; Ciocca, C; Clarke, PEL; Clay, E; Cohen, I; Conboy, JE; Cooke, OC; Couyoumtzelis, C; Coxe, RL; Cuffiani, M; Dado, S; Dallavalle, GM; Davis, R; De Jong, S; de Roeck, A; Dervan, P; Desch, K; Dienes, B; Dixit, MS; Dubbert, J; Duchovni, E; Duckeck, G; Duerdoth, IP; Eatough, D; Estabrooks, PG; Etzion, E; Fabbri, F; Fanti, M; Faust, AA; Fiedler, F; Fierro, M; Fleck, I; Folman, R; Furtjes, A; Futyan, DI; Gagnon, P; Gary, JW; Gascon, J; Gascon-Shotkin, SM; Gaycken, G; Geich-Gimbel, C; Giacomelli, G; Giacomelli, P; Gibson, V; Gibson, WR; Gingrich, DM; Glenzinski, D; Goldberg, J; Gorn, W; Grandi, C; Graham, K; Gross, E; Grunhaus, J; Gruwe, M; Hanson, GG; Hansroul, M; Hapke, M; Harder, K; Harel, A; Hargrove, CK; Hartmann, C; Hauschild, M; Hawkes, CM; Hawkings, R; Hemingway, RJ; Herndon, M; Herten, G; Heuer, RD; Hildreth, MD; Hill, JC; Hobson, PR; Hoch, M; Hocker, A; Hoffman, K; Homer, RJ; Honma, AK; Horvath, D; Hossain, KR; Howard, R; Huntemeyer, P; Igo-Kemenes, P; Imrie, DC; Ishii, K; Jacob, FR; Jawahery, A; Jeremie, H; Jimack, M; Jones, CR; Jovanovic, P; Junk, TR; Karlen, D; Kartvelishvili, V; Kawagoe, K; Kawamoto, T; Kayal, PI; Keeler, RK; Kellogg, RG; Kennedy, BW; Kim, DH; Klier, A; Kluth, S; Kobayashi, T; Kobel, M; Koetke, DS; Kokott, TP; Kolrep, M; Komamiya, S; Kowalewski, RV; Kress, T; Krieger, P; von Krogh, J; Kuhl, T; Kyberd, P; Lafferty, GD; Landsman, H; Lanske, D; Lauber, J; Lautenschlager, SR; Lawson, I; Layter, JG; Lazic, D; Lee, AM; Lellouch, D; Letts, J; Levinson, L; Liebisch, R; List, B; Littlewood, C; Lloyd, AW; Lloyd, SL; Loebinger, FK; Long, GD; Losty, MJ; Ludwig, J; Liu, D; Macchiolo, A; Macpherson, A; Mader, W; Mannelli, M; Marcellini, S; Markopoulos, C; Martin, AJ; Martin, JP; Martinez, G; Mashimo, T; Mattig, P; McDonald, WJ; McKenna, J; Mckigney, EA; McMahon, TJ; McPherson, RA; Meijers, F; Menke, S; Merritt, FS; Mes, H; Meyer, J; Michelini, A; Mihara, S; Mikenberg, G; Miller, DJ; Mir, R; Mohr, W; Montanari, A; Mori, T; Nagai, K; Nakamura, I; Neal, HA; Nellen, B; Nisius, R; ONeale, SW; Oakham, FG; Odorici, F; Ogren, HO; Oreglia, MJ; Orito, S; Palinkas, J; Pasztor, G; Pater, JR; Patrick, GN; Patt, J; Perez-Ochoa, R; Petzold, S; Pfeifenschneider, P; Pilcher, JE; Pinfold, J; Plane, DE; Poffenberger, P; Polok, J; Przybycien, M; Rembser, C; Rick, H; Robertson, S; Robins, SA; Rodning, N; Roney, JM; Roscoe, K; Rossi, AM; Rozen, Y; Runge, K; Runolfsson, O; Rust, DR; Sachs, K; Saeki, T; Sahr, O; Sang, WM; Sarkisyan, EKG; Sbarra, C; Schaile, AD; Schaile, O; Scharf, F; Scharff-Hansen, P; Schieck, J; Schmitt, B; Schmitt, S; Schoning, A; Schroder, M; Schumacher, M; Schwick, C; Scott, WG; Seuster, R; Shears, TG; Shen, BC; Shepherd-Themistocleous, CH; Sherwood, P; Siroli, GP; Sittler, A; Skuja, A; Smith, AM; Snow, GA; Sobie, R; Soldner-Rembold, S; Spagnolo, S; Sproston, M; Stahl, A; Stephens, K; Steuerer, J; Stoll, K; Strom, D; Strohmer, R; Surrow, B; Talbot, SD; Tanaka, S; Taras, P; Tarem, S; Teuscher, R; Thiergen, M; Thomas, J; Thomson, MA; von Torne, E; Torrence, E; Towers, S; Trigger, I; Trocsanyi, Z; Tsur, E; Turcot, AS; Turner-Watson, MF; Ueda, I; Van Kooten, R; Vannerem, P; Verzocchi, M; Voss, H; Wackerle, F; Wagner, A; Ward, CP; Ward, DR; Watkins, PM; Watson, AT; Watson, NK; Wells, PS; Wermes, N; White, JS; Wilson, GW; Wilson, JA; Wyatt, TR; Yamashita, S; Yekutieli, G; Zacek, V; Zer-Zion, D;
Indirizzi:
Univ Bologna, Dipartmento Fis, I-40126 Bologna, Italy Univ Bologna Bologna Italy I-40126 partmento Fis, 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 Ist Nazl Fis Nucl, I-40126 Bologna, Italy Ist Nazl Fis Nucl Bologna Italy I-40126 Fis Nucl, I-40126 Bologna, Italy 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 Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England Univ Cambridge Cambridge England CB3 0HE Lab, Cambridge CB3 0HE, England Carleton Univ, Ottawa Carleton Inst Phys, Dept 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 Particle Phys, CH-1211 Geneva 23, Switzerland CERN Geneva Switzerland 23 Particle Phys, 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 Aachen Tech Univ, Inst Phys 3, D-52056 Aachen, Germany Aachen Tech Univ Aachen Germany D-52056 Phys 3, 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, Schuster Lab, Dept Phys, 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 CLRC, Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England CLRC DidcotOxon England OX11 0QX ton Lab, Didcot OX11 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 Univ Tokyo, Dept Phys, Tokyo 1130033, Japan Univ Tokyo Tokyo Japan 1130033 iv Tokyo, Dept Phys, Tokyo 1130033, Japan Kobe Univ, Kobe, Hyogo 6578501, Japan Kobe Univ Kobe Hyogo Japan 6578501Kobe Univ, Kobe, Hyogo 6578501, Japan Brunel Univ, Inst Phys & Environm Sci, Uxbridge UB8 3PH, Middx, England Brunel Univ Uxbridge Middx England UB8 3PH bridge UB8 3PH, Middx, England Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel Weizmann Inst Sci Rehovot Israel IL-76100 Phys, 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 Duke Univ, Dept Phys, Durham, NC 27708 USA Duke Univ Durham NC USA 27708Duke Univ, Dept Phys, Durham, NC 27708 USA 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 TRIUMF, Vancouver, BC V6T 2A3, Canada TRIUMF Vancouver BC Canada V6T 2A3TRIUMF, Vancouver, BC V6T 2A3, Canada Lajos Kossuth Univ, Dept Expt Phys, Debrecen, Hungary Lajos Kossuth Univ Debrecen Hungary , Dept Expt Phys, Debrecen, Hungary
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL C
fascicolo: 4, volume: 12, anno: 2000,
pagine: 609 - 626
SICI:
1434-6044(200002)12:4<609:MOTBAB>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
MESON LIFETIMES; SEMILEPTONIC DECAYS; CP VIOLATION; MICROVERTEX DETECTOR; TAU-LIFETIME; SUPERWEAK; LEP; ASYMMETRIES; LEPTONS; HADRONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Abbiendi, G Univ Bologna, Dipartmento Fis, I-40126 Bologna, Italy Univ Bologna Bologna Italy I-40126 s, I-40126 Bologna, Italy
Citazione:
G. Abbiendi et al., "Measurement of the B+ and B-0 lifetimes and search for CP(T) violation using reconstructed secondary vertices", EUR PHY J C, 12(4), 2000, pp. 609-626

Abstract

The lifetimes of the B+ and B-0 mesons, and their ratio, have been measured in the OPAL experiment using 2.4 million hadronic Z(0) decays recorded atLEP. Z(0) --> b (b) over bar decays were tagged using displaced secondary vertices and high momentum electrons and muons. The lifetimes were then measured using well-reconstructed charged and neutral secondary vertices selected in this tagged data sample. The results aretau(B+) = 1.643 +/- 0.037 +/- 0.025 pstau(Bo) = 1.523 +/- 0.057 +/- 0.053 pstau(B+)/tau(Bo) = 1.079 +/- 0.064 +/- 0.041,where in each case the first error is statistical and the second systematic. A larger data sample of 3.1 million hadronic Z(o) decays has been used to search for CP and CPT violating effects by comparison of inclusive b and (b) over bar hadron decays, No evidence fur such effects is seen. The CP violation parameter Re(epsilon(B)) is measured to beRe(epsilon(B)) = 0.001 +/- 0.014 +/- 0.003and the fractional difference between b and (b) over bar hadron lifetimes is measured to(Delta tau/tau)(b) = tau(b hadron) - tau((b) over bar hadron)/tau(average)= -0.001 +/- 0.012 +/- 0.008.

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Documento generato il 11/07/20 alle ore 21:10:40