A measurement of Rb using mutually exclusive tags

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,L. Garrido,A. Juste,M. Martinez,R. Miquel,Ll.M. Mir,S. Orteu,C. Padilla,I. C. Park,A. Pascual,J.A. Perlas,Imma Riu,F. Sánchez,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. Silvestric,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,Fabio Cerutti,H. Drevermann,R. 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,Ap Wagner,Z. Ajaltouni,A. Barres,C. Boyer,A. Falvard,C. Ferdi,C. Guicheney,P. Henrard,J. Jousset,B. Michel,S. Monteil,Jean-Claude Montret,D. Pallin,Pascal Perret,F. Podlyski,J. Proriol,Philippe Rosnet,J.M. Rossignol,T. Fearnley,Jørgen Beck 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. R. 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. OShea,C. Raine,J.M. Scarr,Kenway 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,Marten Ole Schmidt,J. Sommer,K. Tittel,S. Werner,M. Wunsch,R. Beuselinck,D.M. Binnie,W. Cameron,P.J. Dornan,M. Girone,S. Goodsir,Ec Martin,A. Moutoussi,Jordan 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,David 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,Jean-Francois Grivaz,P. Heusse,A. Hocker,A. Jacholkowska,M. Jacquet,D.W. Kim,F. Le Diberder,J. Lefrançois,Am 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,Roberto DellOrso,R. Fantechi,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. Sciaba,P. Spagnolo,J. Steinberger,Roberto Tenchini,G. Tonelli,C. Vannini,A. Venturi,P. G. Verdini,G.A. Blair,L.M. Bryant,J.T. Chambers,Y. S. Gao,M.G. Green,T Medcalf,P. Perrodo,J. A. Strong,J. H. von Wimmersperg-Toeller,D. Botterill,R.W. Clifft,T.R. Edgecock,Stephen Haywood,P. Maley,P. R. Norton,Jm 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. N. Taylor,C.N. Booth,R. Boswell,C. 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. Ferguson,Y.S. Gao,S. Gonzalez,T.C. Greening,O.J. Hayes,H. Hu,S. Jin,P.A. McNamara,J. Nachtman,J. Nielsen,W. Orejudos,Y. Pan,Y. Saadi,I.J. Scott,John Walsh,Sau Lan Wu,X. Wu,J.M. Yamartino,G. Zobernig

A measurement of Rb using mutually exclusive tags

1997

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
L. Garrido
A. Juste
M. Martinez
R. Miquel
Ll.M. Mir
S. Orteu
C. Padilla
I. C. Park
A. Pascual
J.A. Perlas
Imma Riu
F. Sánchez
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. Silvestric
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
Fabio Cerutti
H. Drevermann
R. 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
Ap Wagner
Z. Ajaltouni
A. Barres
C. Boyer
A. Falvard
C. Ferdi
C. Guicheney
P. Henrard
J. Jousset
B. Michel
S. Monteil
Jean-Claude Montret
D. Pallin
Pascal Perret
F. Podlyski
J. Proriol
Philippe Rosnet
J.M. Rossignol
T. Fearnley
Jørgen Beck 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. R. 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. OShea
C. Raine
J.M. Scarr
Kenway 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
Marten Ole Schmidt
J. Sommer
K. Tittel
S. Werner
M. Wunsch
R. Beuselinck
D.M. Binnie
W. Cameron
P.J. Dornan
M. Girone
S. Goodsir
Ec Martin
A. Moutoussi
Jordan 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
David 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
Jean-Francois Grivaz
P. Heusse
A. Hocker
A. Jacholkowska
M. Jacquet
D.W. Kim
F. Le Diberder
J. Lefrançois
Am 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
Roberto DellOrso
R. Fantechi
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. Sciaba
P. Spagnolo
J. Steinberger
Roberto Tenchini
G. Tonelli
C. Vannini
A. Venturi
P. G. Verdini
G.A. Blair
L.M. Bryant
J.T. Chambers
Y. S. Gao
M.G. Green
T Medcalf
P. Perrodo
J. A. Strong
J. H. von Wimmersperg-Toeller
D. Botterill
R.W. Clifft
T.R. Edgecock
Stephen Haywood
P. Maley
P. R. Norton
Jm 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. N. Taylor
C.N. Booth
R. Boswell
C. 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. Ferguson
Y.S. Gao
S. Gonzalez
T.C. Greening
O.J. Hayes
H. Hu
S. Jin
P.A. McNamara
J. Nachtman
J. Nielsen
W. Orejudos
Y. Pan
Y. Saadi
I.J. Scott
John Walsh
Sau Lan Wu
X. Wu
J.M. Yamartino
G. Zobernig

A measurement of Rb using five mutually exclusive hemisphere tags has been performed by ALEPH using the full LEP1 statistics. Three tags are designed to select the decay of the Z0 to b quarks, while the remaining two select Z0 decays to c and light quarks, and are used to measure the tagging efficiencies. The result, Rb = 0.2159 ± 0.0009(stat) ±0.0011(syst), is in agreement with the electroweak theory prediction of 0.2158 ± 0.0003.

Keywords:

Quark
Quantum electrodynamics
Electroweak interaction
Particle physics
Physics
Mutually exclusive events
Aleph

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