Measurements of the Strong Coupling Constant and the QCD Colour Factors using Four-jet Observables from Hadronic Z Decays
A. Heister
,
S. Schael
,
R. Barate
(1)
,
I. de Bonis
(1)
,
D. Decamp
(1)
,
C. Goy
(1)
,
J P. Lees
(1)
,
E. Merle
(1)
,
M N. Minard
(1)
,
B. Pietrzyk
(1)
,
G. Boix
,
S. Bravo
,
M P. Casado
,
M. Chmeissani
,
J M. Crespo
,
E. Fernandez
,
M. Fernandez-Bosman
,
L. Garrido
,
E. Grauges
,
M. Martinez
,
G. Merino
,
R. Miquel
,
L M. Mir
,
A. Pacheco
,
H. Ruiz
,
A. Colaleo
,
D. Creanza
,
M. de Palma
,
G. Iaselli
,
G. Maggi
,
M. Maggi
,
S. Nuzzo
,
A. Ranieri
,
G. Raso
,
F. Ruggieri
,
G. Selvaggi
,
L. Silvestris
,
P. Tempesta
,
A. Tricomi
,
G. Zito
,
X. Huang
,
Jiali Lin
,
Q. Ouyang
,
T. Wang
,
Y. Xie
,
R. Xu
,
S. Xue
,
J. Zhang
,
L. Zhang
,
W. Zhao
,
D. Abbaneo
,
P. Azzurri
,
O. Buchmueller
,
M. Cattaneo
,
F. Cerutti
,
B. Clerbaux
,
H. Drevermann
,
R W. Forty
,
M. Frank
,
F. Gianotti
,
T C. Greening
,
J B. Hansen
,
J. Harvey
,
D E. Hutchcroft
,
P. Janot
,
B. Jost
,
M. Kado
,
P. Mato
,
A. Moutoussi
,
F. Ranjard
,
L. Rolandi
,
D. Schlatter
,
O. Schneider
,
G. Sguazzoni
,
W. Tejessy
,
F. Teubert
,
A. Valassi
,
I. Videau
,
J. Ward
,
F. Badaud
(2)
,
Alain Falvard
(2, 3)
,
Pascal Gay
(2)
,
Pierre Henrard
(2)
,
J. Jousset
(2)
,
B. Michel
(2)
,
S. Monteil
(2)
,
Jean-Claude Montret
(2)
,
D. Pallin
(2)
,
Pascal Perret
(2)
,
J D. Hansen
,
J R. Hansen
,
P H. Hansen
,
B S. Nilsson
,
A. Kyriakis
,
C. Markou
,
E. Simopoulou
,
A. Vayaki
,
K. Zachariadou
,
A. Blondel
(4)
,
G. Bonneaud
(4)
,
J C. Brient
(4)
,
A. Rouge
(4)
,
M. Rumpf
(4)
,
M. Swynghedauw
(4)
,
M. Verderi
(4)
,
H. Videau
(4)
,
V. Ciulli
,
E. Focardi
,
G. Parrini
,
A. Antonelli
,
M. Antonelli
,
G. Bencivenni
,
F. Bossi
,
P. Campana
,
G. Capon
,
V. Chiarella
,
P. Laurelli
,
G. Mannocchi
,
F. Murtas
,
G P. Murtas
,
L. Passalacqua
,
M. Pepe-Altarelli
,
A. Halley
,
J G. Lynch
,
P. Negus
,
V. O'Shea
,
C. Raine
,
a S. Thompson
,
S. Wasserbaech
,
R. Cavanaugh
,
S. Dhamotharan
,
C. Geweniger
,
P. Hanke
,
V. Hepp
,
E E. Kluge
,
A. Putzer
,
H. Stenzel
,
K. Tittel
,
M. Wunsch
,
R. Beuselinck
,
D M. Binnie
,
W. Cameron
,
P J. Dornan
,
M. Girone
,
N. Marinelli
,
J K. Sedgbeer
,
J C. Thompson
,
V M. Ghete
,
P. Girtler
,
E. Kneringer
,
D. Kuhn
,
G. Rudolph
,
E. Bouhova-Thacker
,
C K. Bowdery
,
a J. Finch
,
F. Foster
,
G. Hughes
,
R W L. Jones
,
M R. Pearson
,
N A. Robertson
,
K. Jakobs
,
K. Kleinknecht
,
G. Quast
,
B. Renk
,
H G. Sander
,
H. Wachsmuth
,
C. Zeitnitz
,
A. Bonissent
(5)
,
P. Coyle
(5)
,
O. Leroy
(5)
,
P. Payre
(5)
,
D. Rousseau
(5)
,
M. Talby
(5)
,
F. Ragusa
,
A. David
,
H. Dietl
,
G. Ganis
,
K. Huettmann
,
G. Luetjens
,
W. Maenner
,
H G. Moser
,
R. Settles
,
G. Wolf
,
J. Boucrot
(6)
,
O. Callot
(6)
,
M. Davier
(6)
,
L. Duflot
(6)
,
J F. Grivaz
(6)
,
P. Heusse
(6)
,
A. Jacholkowska
(3, 6)
,
J. Lefrancois
(6)
,
J J. Veillet
(6)
,
C. Yuan
(6)
,
G. Bagliesi
,
T. Boccali
,
L. Foa
,
A. Giammanco
,
A. Giassi
,
F. Ligabue
,
A. Messineo
,
F. Palla
,
G. Sanguinetti
,
A. Sciaba
,
P. Spagnolo
,
R. Tenchini
,
A. Venturi
,
P G. Verdini
,
Z. Xie
,
G A. Blair
,
G. Cowan
,
M G. Green
,
T. Medcalf
,
A. Misiejuk
,
J A. Strong
,
P. Teixeira-Dias
,
R W. Clifft
,
T R. Edgecock
,
P R. Norton
,
I R. Tomalin
,
B. Bloch-Devaux
,
P. Colas
,
S. Emery
,
W. Kozanecki
,
E. Lancon
,
M C. Lemaire
,
E. Locci
,
P. Perez
,
J. Rander
,
J F. Renardy
,
A. Roussarie
,
J P. Schuller
,
J. Schwindling
,
A. Trabelsi
,
B. Vallage
,
N. Konstantinidis
,
a M. Litke
,
G. Taylor
,
C N. Booth
,
S. Cartwright
,
F. Combley
,
M H. Lehto
,
L F. Thompson
,
K. Affholderbach
,
A. Boehrer
,
S. Brandt
,
C. Grupen
,
A. Ngac
,
G. Prange
,
U. Sieler
,
G. Giannini
,
J E. Rothberg
,
S R. Armstrong
,
K. Berkelman
,
K. Cranmer
,
D P S. Ferguson
,
Y. Gao
,
S. Gonzalez
,
O J. Hayes
,
H. Hu
,
S. Jin
,
J. Kile
,
P A. Mcnamara
,
J. Nielsen
,
y B. Pan
,
J H. von Wimmersperg-Toeller
,
W. Wiedenmann
,
J. Wu
,
S L. Wu
,
X. Wu
,
G. Zobernig
1
LAPP -
Laboratoire d'Annecy de Physique des Particules
2 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
3 LPTA - Laboratoire de Physique Théorique et Astroparticules
4 LLR - Laboratoire Leprince-Ringuet
5 CPPM - Centre de Physique des Particules de Marseille
6 LAL - Laboratoire de l'Accélérateur Linéaire
2 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
3 LPTA - Laboratoire de Physique Théorique et Astroparticules
4 LLR - Laboratoire Leprince-Ringuet
5 CPPM - Centre de Physique des Particules de Marseille
6 LAL - Laboratoire de l'Accélérateur Linéaire
A. Heister
- Function : Author
S. Schael
- Function : Author
C. Goy
- Function : Author
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E. Merle
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G. Boix
- Function : Author
S. Bravo
- Function : Author
M P. Casado
- Function : Author
M. Chmeissani
- Function : Author
J M. Crespo
- Function : Author
E. Fernandez
- Function : Author
M. Fernandez-Bosman
- Function : Author
L. Garrido
- Function : Author
E. Grauges
- Function : Author
M. Martinez
- Function : Author
G. Merino
- Function : Author
R. Miquel
- Function : Author
L M. Mir
- Function : Author
A. Pacheco
- Function : Author
H. Ruiz
- Function : Author
A. Colaleo
- Function : Author
D. Creanza
- Function : Author
M. de Palma
- Function : Author
G. Iaselli
- Function : Author
G. Maggi
- Function : Author
M. Maggi
- Function : Author
S. Nuzzo
- Function : Author
A. Ranieri
- Function : Author
G. Raso
- Function : Author
F. Ruggieri
- Function : Author
G. Selvaggi
- Function : Author
L. Silvestris
- Function : Author
P. Tempesta
- Function : Author
A. Tricomi
- Function : Author
G. Zito
- Function : Author
X. Huang
- Function : Author
Jiali Lin
- Function : Author
Q. Ouyang
- Function : Author
T. Wang
- Function : Author
Y. Xie
- Function : Author
R. Xu
- Function : Author
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S. Xue
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J. Zhang
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L. Zhang
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W. Zhao
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D. Abbaneo
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P. Azzurri
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O. Buchmueller
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M. Cattaneo
- Function : Author
F. Cerutti
- Function : Author
B. Clerbaux
- Function : Author
H. Drevermann
- Function : Author
R W. Forty
- Function : Author
M. Frank
- Function : Author
F. Gianotti
- Function : Author
T C. Greening
- Function : Author
J B. Hansen
- Function : Author
J. Harvey
- Function : Author
D E. Hutchcroft
- Function : Author
P. Janot
- Function : Author
B. Jost
- Function : Author
M. Kado
- Function : Author
P. Mato
- Function : Author
A. Moutoussi
- Function : Author
F. Ranjard
- Function : Author
L. Rolandi
- Function : Author
D. Schlatter
- Function : Author
O. Schneider
- Function : Author
G. Sguazzoni
- Function : Author
W. Tejessy
- Function : Author
F. Teubert
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A. Valassi
- Function : Author
I. Videau
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J. Ward
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Alain Falvard
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Pascal Gay
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Pierre Henrard
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Pascal Perret
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J D. Hansen
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J R. Hansen
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P H. Hansen
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B S. Nilsson
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A. Kyriakis
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C. Markou
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E. Simopoulou
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A. Vayaki
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K. Zachariadou
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V. Ciulli
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E. Focardi
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G. Parrini
- Function : Author
A. Antonelli
- Function : Author
M. Antonelli
- Function : Author
G. Bencivenni
- Function : Author
F. Bossi
- Function : Author
P. Campana
- Function : Author
G. Capon
- Function : Author
V. Chiarella
- Function : Author
P. Laurelli
- Function : Author
G. Mannocchi
- Function : Author
F. Murtas
- Function : Author
G P. Murtas
- Function : Author
L. Passalacqua
- Function : Author
M. Pepe-Altarelli
- Function : Author
A. Halley
- Function : Author
J G. Lynch
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P. Negus
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V. O'Shea
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C. Raine
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a S. Thompson
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S. Wasserbaech
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R. Cavanaugh
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S. Dhamotharan
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C. Geweniger
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P. Hanke
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V. Hepp
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E E. Kluge
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A. Putzer
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H. Stenzel
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K. Tittel
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M. Wunsch
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R. Beuselinck
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D M. Binnie
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W. Cameron
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P J. Dornan
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M. Girone
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N. Marinelli
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J K. Sedgbeer
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J C. Thompson
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V M. Ghete
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P. Girtler
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E. Kneringer
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D. Kuhn
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G. Rudolph
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E. Bouhova-Thacker
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C K. Bowdery
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a J. Finch
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F. Foster
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G. Hughes
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R W L. Jones
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M R. Pearson
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N A. Robertson
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K. Jakobs
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K. Kleinknecht
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G. Quast
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B. Renk
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H G. Sander
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H. Wachsmuth
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C. Zeitnitz
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O. Leroy
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D. Rousseau
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F. Ragusa
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A. David
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H. Dietl
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G. Ganis
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K. Huettmann
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G. Luetjens
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W. Maenner
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H G. Moser
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R. Settles
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G. Wolf
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G. Bagliesi
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T. Boccali
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L. Foa
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A. Giammanco
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A. Giassi
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F. Ligabue
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A. Messineo
- Function : Author
F. Palla
- Function : Author
G. Sanguinetti
- Function : Author
A. Sciaba
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P. Spagnolo
- Function : Author
R. Tenchini
- Function : Author
A. Venturi
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P G. Verdini
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Z. Xie
- Function : Author
G A. Blair
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G. Cowan
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M G. Green
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T. Medcalf
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A. Misiejuk
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J A. Strong
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P. Teixeira-Dias
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R W. Clifft
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T R. Edgecock
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P R. Norton
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I R. Tomalin
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B. Bloch-Devaux
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P. Colas
- Function : Author
S. Emery
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W. Kozanecki
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E. Lancon
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M C. Lemaire
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E. Locci
- Function : Author
P. Perez
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J. Rander
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J F. Renardy
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A. Roussarie
- Function : Author
J P. Schuller
- Function : Author
J. Schwindling
- Function : Author
A. Trabelsi
- Function : Author
B. Vallage
- Function : Author
N. Konstantinidis
- Function : Author
a M. Litke
- Function : Author
G. Taylor
- Function : Author
C N. Booth
- Function : Author
S. Cartwright
- Function : Author
F. Combley
- Function : Author
M H. Lehto
- Function : Author
L F. Thompson
- Function : Author
K. Affholderbach
- Function : Author
A. Boehrer
- Function : Author
S. Brandt
- Function : Author
C. Grupen
- Function : Author
A. Ngac
- Function : Author
G. Prange
- Function : Author
U. Sieler
- Function : Author
G. Giannini
- Function : Author
J E. Rothberg
- Function : Author
S R. Armstrong
- Function : Author
K. Berkelman
- Function : Author
K. Cranmer
- Function : Author
D P S. Ferguson
- Function : Author
Y. Gao
- Function : Author
S. Gonzalez
- Function : Author
O J. Hayes
- Function : Author
H. Hu
- Function : Author
S. Jin
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J. Kile
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P A. Mcnamara
- Function : Author
J. Nielsen
- Function : Author
y B. Pan
- Function : Author
J H. von Wimmersperg-Toeller
- Function : Author
W. Wiedenmann
- Function : Author
J. Wu
- Function : Author
S L. Wu
- Function : Author
X. Wu
- Function : Author
- PersonId : 829304
G. Zobernig
- Function : Author
Abstract
Data from e+e- annihilation into hadrons, taken with the ALEPH detector at the Z resonance, are analyzed. The four-jet rate is studied as a function of the resolution parameter and compared to next-to-leading order calculations combined with resummation of large logarithms. Angular correlations in four-jet events are measured and compared to next-to-leading order QCD predictions. With these observables two different measurements are performed. In a first analysis the strong coupling constant is measured from the four-jet rate yielding alpha_s(M_ Z}) = 0.1170 \pm 0.0001(stat) \pm 0.0014(sys) In a second measurement the strong coupling constant and the \textsc{QCD} colour factors are determined simultaneously from a fit to the four-jet rate and the four-jet angular correlations, giving alpha_s(M_ Z) = 0.119 \pm 0.006(stat) \pm 0.026 (sys) C_A = 2.93 \pm 0.14(stat) \pm 0.58 (sys) C_F} = 1.35 \pm 0.07 (stat) \pm 0.26 (sys) in good agreement with the expectation from QCD.
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