A measurement of Rb using a lifetime-mass tag

6533b81ffe1ef96bd1277aee

RESEARCH PRODUCT

A measurement of Rb using a lifetime-mass tag

R. Barate D. Buskulic D. Decamp P. Ghez C. Goy J.-p. Lees A. Lucotte M.-n. Minard J.-y. Nief B. Pietrzyk M.p. Casado M. Chmeissani P. Comas J.m. Crespo M. Delfino E. Fernandez M. Fernandez-bosman Ll. Garrido A. Juste M. Martinez R. Miquel Ll.m. Mir S. Orteu C. Padilla I.c. Park A. Pascual J.a. Perlas I. Riu F. Sanchez F. Teubert A. Colaleo D. Creanza M. De Palma G. Gelao G. Iaselli G. Maggi M. Maggi N. Marinelli S. Nuzzo A. Ranieri G. Raso F. Ruggieri G. Selvaggi L. Silvestris P. Tempesta A. Tricomi G. Zito X. Huang J. Lin Q. Ouyang T. Wang Y. Xie R. Xu S. Xue J. Zhang L. Zhang W. Zhao D. Abbaneo R. Alemany U. Becker A.o. Bazarko P. Bright-thomas M. Cattaneo F. Cerutti H. Drevermann R.w. Forty M. Frank R. Hagelberg J. Harvey P. Janot B. Jost E. Kneringer J. Knobloch I. Lehraus G. Lutters P. Mato A. Minten L. Moneta A. Pacheco J.-f. Pusztaszeri F. Ranjard P. Rensing G. Rizzo L. Rolandi D. Schlatter M. Schmitt O. Schneider W. Tejessy I.r. Tomalin H. Wachsmuth A. Wagner Z. Ajaltouni A. Barrès C. Boyer A. Falvard C. Ferdi P. Gay C. Guicheney P. Henrard J. Jousset B. Michel S. Monteil J-c. Montret D. Pallin P. Perret F. Podlyski J. Proriol P. Rosnet J.-m. Rossignol T. Fearnley J.b. Hansen J.d. Hansen J.r. Hansen P.h. Hansen B.s. Nilsson B. Rensch A. Wäänänen G. Daskalakis A. Kyriakis C. Markou E. Simopoulou I. Siotis A. Vayaki A. Blondel G. Bonneaud J.c. Brient P. Bourdon A. Rougé M. Rumpf A. Valassi M. Verderi H. Videau D.j. Candlin M.i. Parsons E. Focardi G. Parrini K. Zachariadou M. Corden C. Georgiopoulos D.e. Jaffe A. Antonelli G. Bencivenni G. Bologna F. Bossi P. Campana G. Capon D. Casper V. Chiarella G. Felici P. Laurelli G. Mannocchi F. Murtas G.p. Murtas L. Passalacqua M. Pepe-altarelli L. Curtis S.j. Dorris A.w. Halley I.g. Knowles J.g. Lynch V. O'shea C. Raine J.m. Scarr K. Smith P. Teixeira-dias A.s. Thompson E. Thomson F. Thomson R.m. Turnbull C. Geweniger G. Graefe P. Hanke G. Hansper V. Hepp E.e. Kluge A. Putzer M. Schmidt J. Sommer K. Tittel S. Werner M. Wunsch R. Beuselinck D.m. Binnie W. Cameron P.j. Dornan M. Girone S. Goodsir E.b. Martin A. Moutoussi J. Nash J.k. Sedgbeer A.m. Stacey M.d. Williams G. Dissertori V.m. Ghete P. Girtler D. Kuhn G. Rudolph A.p. Betteridge C.k. Bowdery P. Colrain G. Crawford A.j. Finch F. Foster G. Hughes T. Sloan M.i. Williams A. Galla I. Giehl A.m. Greene C. Hoffmann K. Jakobs K. Kleinknecht G. Quast B. Renk E. Rohne H.-g. Sander P. Van Gemmeren C. Zeitnitz J.j. Aubert C. Benchouk A. Bonissent G. Bujosa D. Calvet J. Carr P. Coyle C. Diaconu F. Etienne N. Konstantinidis O. Leroy F. Motsch P. Payre D. Rousseau M. Talby A. Sadouki M. Thulasidas K. Trabelsi M. Aleppo F. Ragusa R. Berlich W. Blum D. Brown V. Büscher H. Dietl F. Dydak G. Ganis C. Gotzhein H. Kroha G. Lütjens G. Lutz W. Männer H.-g. Moser R. Richter A. Rosado-schlosser S. Schael R. Settles H. Seywerd R.st. Denis H. Stenzel W. Wiedenmann G. Wolf J. Boucrot O. Callot S. Chen Y. Choi A. Cordier M. Davier L. Duflot J.-f. Grivaz Ph. Heusse A. Höcker A. Jacholkowska M. Jacquet D.w. Kim F. Le Diberder J. Lefrançois A.-m. Lutz I. Nikolic M.-h. Schune S. Simion E. Tournefier J.-j. Veillet I. Videau D. Zerwas P. Azzurri G. Bagliesi G. Batignani S. Bettarini C. Bozzi G. Calderini M. Carpinelli M.a. Ciocci V. Ciulli R. Dell'orso R. Fantechi I. Ferrante L. Foà F. Forti A. Giassi M.a. Giorgi A. Gregorio F. Ligabue A. Lusiani P.s. Marrocchesi A. Messineo F. Palla G. Sanguinetti A. Sciabà P. Spagnolo J. Steinberger R. Tenchini G. Tonelli C. Vannini A. Venturi P.g. Verdini G.a. Blair L.m. Bryant J.t. Chambers Y. Gao M.g. Green T. Medcalf P. Perrodo J.a. Strong J.h. Von Wimmersperg-toeller D.r. Botterill R.w. Clifft T.r. Edgecock S. Haywood P. Maley P.r. Norton J.c. Thompson A.e. Wright B. Bloch-devaux P. Colas S. Emery W. Kozanecki E. Lançon M.c. Lemaire E. Locci P. Perez J. Rander J.-f. Renardy A. Roussarie J.-p. Schuller J. Schwindling A. Trabelsi B. Vallage S.n. Black J.h. Dann R.p. Johnson H.y. Kim A.m. Litke M.a. Mcneil G. Taylor C.n. Booth R. Boswell C.a.j. Brew S. Cartwright F. Combley M.s. Kelly M. Lehto W.m. Newton J. Reeve L.f. Thompson A. Böhrer S. Brandt G. Cowan C. Grupen P. Saraiva L. Smolik F. Stephan M. Apollonio L. Bosisio R. Della Marina G. Giannini B. Gobbo G. Musolino J. Rothberg S. Wasserbaech S.r. Armstrong E. Charles P. Elmer D.p.s. Ferguson Y.s. Gao S. González T.c. Greening O.j. Hayes H. Hu S. Jin P.a. Mcnamara J.m. Nachtman J. Nielsen W. Orejudos Y.b. Pan Y. Saadi I.j. Scott J. Walsh Null Sau Lan Wu X. Wu J.m. Yamartino G. Zobernig

subject

Physics Nuclear and High Energy Physics Particle physics Aleph 010308 nuclear & particles physics Electron–positron annihilation Physics Hadron 01 natural sciences Vertex (geometry)Nuclear physics ALEPH Experiment 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physics ALEPH experiment Particle Physics - Experiment

description

ALEPH's published measurement of R-b = Gamma(Z --> b (b) over bar)/Gamma(Z --> hadrons) using a lifetime tag is updated using the full LEP 1 data sample. Considerable effort has been devoted to understanding systematic effects. Charm background is better controlled by combining the lifetime tag with a tag based on the b/c hadron mass difference. Furthermore, the algorithm used to reconstruct the event primary vertex is designed so as to reduce correlations between the two hemispheres of an event. The value of R-b is measured to be 0.2167 +/- 0.0011(stat) +/- 0.0013(syst). (C) 1997 Published by Elsevier Science B.V. RI ANTONELLI, ANTONELLA/C-6238-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; St.Denis, Richard/C-8997-2012; Sanchez, Federico/F-5809-2012; Forti, Francesco/H-3035-2011; Ferrante, Isidoro/F-1017-2012

year	journal	country	edition	language
1997-01-01

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