Study of Charm Production in Z Decays
R. Barate
(1)
,
D. Decamp
(1)
,
P. Ghez
(1)
,
C. Goy
(1)
,
J P. Lees
(1)
,
E. Merle
(1)
,
M N. Minard
(1)
,
B. Pietrzyk
(1)
,
R. Alemany
,
M P. Casado
,
M. Chmeissani
,
J M. Crespo
,
E. Fernandez
,
M. Fernandez-Bosman
,
L. Garrido
,
E. Grauges
,
A. Juste
,
M. Martinez
,
G. Merino
,
R. Miquel
,
L M. Mir
,
A. Pacheco
,
I C. Park
,
I. Riu
,
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
,
U. Becker
,
G. Boix
,
M. Cattaneo
,
F. Cerutti
,
V. Ciulli
,
G. Dissertori
,
H. Drevermann
,
R W. Forty
,
M. Frank
,
T C. Greening
,
a W. Halley
,
J B. Hansen
,
J. Harvey
,
P. Janot
,
B. Jost
,
I. Lehraus
,
O. Leroy
,
P. Mato
,
A. Minten
,
A. Moutoussi
,
F. Ranjard
,
L. Rolandi
,
D. Schlatter
,
M. Schmitt
,
O. Schneider
,
P. Spagnolo
,
W. Tejessy
,
F. Teubert
,
I R. Tomalin
,
E. Tournefier
,
a E. Wright
,
Ziad Zj Ajaltouni
(2)
,
F. Badaud
(2)
,
G. Chazelle
(2)
,
O. Deschamps
(2)
,
Alain Falvard
(2)
,
C. Ferdi
(2)
,
Pascal Gay
(2)
,
C. Guicheney
(2)
,
Pierre Henrard
(2)
,
J. Jousset
(2)
,
B. Michel
(2)
,
S. Monteil
(2)
,
Jean-Claude Montret
(2)
,
D. Pallin
(2)
,
Pascal Perret
(2)
,
F. Podlyski
(2)
,
J D. Hansen
,
J R. Hansen
,
P H. Hansen
,
B S. Nilsson
,
B. Rensch
,
A. Waananen
,
G. Daskalakis
,
A. Kyriakis
,
C. Markou
,
E. Simopoulou
,
I. Siotis
,
A. Vayaki
,
A. Blondel
(3)
,
G. Bonneaud
(3)
,
J C. Brient
(3)
,
A. Rouge
(3)
,
M. Rumpf
(3)
,
M. Swynghedauw
(3)
,
M. Verderi
(3)
,
H. Videau
(3)
,
E. Focardi
,
G. Parrini
,
K. Zachariadou
,
R. Cavanaugh
,
M. Corden
,
C. Georgiopoulos
,
A. Antonelli
,
G. Bencivenni
,
G. Bologna
,
F. Bossi
,
P. Campana
,
G. Capon
,
V. Chiarella
,
P. Laurelli
,
G. Mannocchi
,
F. Murtas
,
G P. Murtas
,
L. Passalacqua
,
M. Pepe-Altarelli
,
L. Curtis
,
J G. Lynch
,
P. Negus
,
V. O'Shea
,
C. Raine
,
P. Teixeira-Dias
,
a S. Thompson
,
O. Buchmuller
,
S. Dhamotharan
,
C. Geweniger
,
G. Graefe
,
P. Hanke
,
G. Hansper
,
V. Hepp
,
E E. Kluge
,
A. Putzer
,
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
,
N. Marinelli
,
A. Sciaba
,
J K. Sedgbeer
,
E. Thomson
,
M D. Williams
,
V M. Ghete
,
P. Girtler
,
E. Kneringer
,
D. Kuhn
,
G. Rudolph
,
C K. Bowdery
,
P G. Buck
,
a J. Finch
,
F. Foster
,
G. Hughes
,
R W L. Jones
,
N A. Robertson
,
M I. Williams
,
I. Giehl
,
K. Jakobs
,
K. Kleinknecht
,
G. Quast
,
B. Renk
,
E. Rohne
,
H G. Sander
,
H. Wachsmuth
,
C. Zeitnitz
,
J.J. Aubert
(4)
,
C. Benchouk
(4)
,
A. Bonissent
(4)
,
J. Carr
(4)
,
P. Coyle
(4)
,
F. Etienne
(4)
,
F. Motsch
(4)
,
P. Payre
(4)
,
D. Rousseau
(4)
,
M. Talby
(4)
,
M. Thulasidas
(4)
,
M. Aleppo
,
M. Antonelli
,
F. Ragusa
,
V. Buscher
,
H. Dietl
,
G. Ganis
,
K. Huttmann
,
G. Lutjens
,
C. Mannert
,
W. Manner
,
H G. Moser
,
S. Schael
,
R. Settles
,
H. Seywerd
,
H. Stenzel
,
W. Wiedenmann
,
G. Wolf
,
P. Azzurri
(5)
,
J. Boucrot
(5)
,
O. Callot
(5)
,
S. Chen
(5)
,
A. Cordier
(5)
,
M. Davier
(5)
,
L. Duflot
,
J F. Grivaz
,
P. Heusse
,
A. Jacholkowska
(5)
,
F. Le Diberder
(5)
,
J. Lefrancois
,
a M. Lutz
(5)
,
M H. Schune
(5)
,
J J. Veillet
(5)
,
I. Videau
,
D. Zerwas
(5)
,
G. Bagliesi
,
S. Bettarini
,
T. Boccali
,
C. Bozzi
,
G. Calderini
,
R. Dell'Orso
,
I. Ferrante
,
L. Foa
,
A. Giassi
,
A. Gregorio
,
F. Ligabue
,
A. Lusiani
,
P S. Marrocchesi
,
A. Messineo
,
F. Palla
,
G. Rizzo
,
G. Sanguinetti
,
G. Sguazzoni
,
R. Tenchini
,
C. Vannini
,
A. Venturi
,
P G. Verdini
,
G A. Blair
,
G. Cowan
,
M G. Green
,
T. Medcalf
,
J A. Strong
,
J H. von Wimmersperg-Toeller
,
D R. Botterill
,
R W. Clifft
,
T R. Edgecock
,
P R. Norton
,
J C. Thompson
,
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
,
S N. Black
,
J H. Dann
,
R P. Johnson
,
H Y. Kim
,
N. Konstantinidis
,
a M. Litke
,
M A. Mcneil
,
G. Taylor
,
C N. Booth
,
S. Cartwright
,
F. Combley
,
M S. Kelly
,
M. Lehto
,
L F. Thompson
,
K. Affholderbach
,
A. Bohrer
,
S. Brandt
,
C. Grupen
,
J. Hess
,
C. Koob
,
A. Misiejuk
,
G. Prange
,
U. Sieler
,
G. Giannini
,
B. Gobbo
,
J E. Rothberg
,
S. Wasserbaech
,
S R. Armstrong
,
P. Elmer
,
D P S. Ferguson
,
Y. Gao
,
S. Gonzalez
,
O J. Hayes
,
H. Hu
,
S. Jin
,
P A. Mcnamara
,
J. Nielsen
,
W. Orejudos
,
y B. Pan
,
Y. Saadi
,
I J. Scott
,
J. Walsh
,
S L. Wu
,
X. Wu
,
G. Zobernig
C. Goy
- Function : Author
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E. Merle
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R. Alemany
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M P. Casado
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M. Chmeissani
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J M. Crespo
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E. Fernandez
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M. Fernandez-Bosman
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L. Garrido
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E. Grauges
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A. Juste
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M. Martinez
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G. Merino
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R. Miquel
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L M. Mir
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A. Pacheco
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I C. Park
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I. Riu
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A. Colaleo
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D. Creanza
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M. de Palma
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G. Iaselli
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G. Maggi
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M. Maggi
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S. Nuzzo
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A. Ranieri
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G. Raso
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F. Ruggieri
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G. Selvaggi
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L. Silvestris
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P. Tempesta
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A. Tricomi
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G. Zito
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X. Huang
- Function : Author
Jiali Lin
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Q. Ouyang
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T. Wang
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Y. Xie
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R. Xu
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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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U. Becker
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G. Boix
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M. Cattaneo
- Function : Author
F. Cerutti
- Function : Author
V. Ciulli
- Function : Author
G. Dissertori
- Function : Author
H. Drevermann
- Function : Author
R W. Forty
- Function : Author
M. Frank
- Function : Author
T C. Greening
- Function : Author
a W. Halley
- Function : Author
J B. Hansen
- Function : Author
J. Harvey
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P. Janot
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B. Jost
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I. Lehraus
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P. Mato
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A. Minten
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A. Moutoussi
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F. Ranjard
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L. Rolandi
- Function : Author
D. Schlatter
- Function : Author
M. Schmitt
- Function : Author
O. Schneider
- Function : Author
P. Spagnolo
- Function : Author
W. Tejessy
- Function : Author
F. Teubert
- Function : Author
I R. Tomalin
- Function : Author
E. Tournefier
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a E. Wright
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Ziad Zj Ajaltouni
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O. Deschamps
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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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B. Rensch
- Function : Author
A. Waananen
- Function : Author
G. Daskalakis
- Function : Author
A. Kyriakis
- Function : Author
C. Markou
- Function : Author
E. Simopoulou
- Function : Author
I. Siotis
- Function : Author
A. Vayaki
- Function : Author
E. Focardi
- Function : Author
G. Parrini
- Function : Author
K. Zachariadou
- Function : Author
R. Cavanaugh
- Function : Author
M. Corden
- Function : Author
C. Georgiopoulos
- Function : Author
A. Antonelli
- Function : Author
G. Bencivenni
- Function : Author
G. Bologna
- 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
L. Curtis
- Function : Author
J G. Lynch
- Function : Author
P. Negus
- Function : Author
V. O'Shea
- Function : Author
C. Raine
- Function : Author
P. Teixeira-Dias
- Function : Author
a S. Thompson
- Function : Author
O. Buchmuller
- Function : Author
S. Dhamotharan
- Function : Author
C. Geweniger
- Function : Author
G. Graefe
- Function : Author
P. Hanke
- Function : Author
G. Hansper
- Function : Author
V. Hepp
- Function : Author
E E. Kluge
- Function : Author
A. Putzer
- Function : Author
J. Sommer
- Function : Author
K. Tittel
- Function : Author
S. Werner
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M. Wunsch
- Function : Author
R. Beuselinck
- Function : Author
D M. Binnie
- Function : Author
W. Cameron
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P J. Dornan
- Function : Author
M. Girone
- Function : Author
S. Goodsir
- Function : Author
E B. Martin
- Function : Author
N. Marinelli
- Function : Author
A. Sciaba
- Function : Author
J K. Sedgbeer
- Function : Author
E. Thomson
- Function : Author
M D. Williams
- Function : Author
V M. Ghete
- Function : Author
P. Girtler
- Function : Author
E. Kneringer
- Function : Author
D. Kuhn
- Function : Author
G. Rudolph
- Function : Author
C K. Bowdery
- Function : Author
P G. Buck
- Function : Author
a J. Finch
- Function : Author
F. Foster
- Function : Author
G. Hughes
- Function : Author
R W L. Jones
- Function : Author
N A. Robertson
- Function : Author
M I. Williams
- Function : Author
I. Giehl
- Function : Author
K. Jakobs
- Function : Author
K. Kleinknecht
- Function : Author
G. Quast
- Function : Author
B. Renk
- Function : Author
E. Rohne
- Function : Author
H G. Sander
- Function : Author
H. Wachsmuth
- Function : Author
C. Zeitnitz
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D. Rousseau
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M. Aleppo
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M. Antonelli
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F. Ragusa
- Function : Author
V. Buscher
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H. Dietl
- Function : Author
G. Ganis
- Function : Author
K. Huttmann
- Function : Author
G. Lutjens
- Function : Author
C. Mannert
- Function : Author
W. Manner
- Function : Author
H G. Moser
- Function : Author
S. Schael
- Function : Author
R. Settles
- Function : Author
H. Seywerd
- Function : Author
H. Stenzel
- Function : Author
W. Wiedenmann
- Function : Author
G. Wolf
- Function : Author
L. Duflot
- Function : Author
J F. Grivaz
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P. Heusse
- Function : Author
J. Lefrancois
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I. Videau
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G. Bagliesi
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S. Bettarini
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T. Boccali
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C. Bozzi
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G. Calderini
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R. Dell'Orso
- Function : Author
I. Ferrante
- Function : Author
L. Foa
- Function : Author
A. Giassi
- Function : Author
A. Gregorio
- Function : Author
F. Ligabue
- Function : Author
A. Lusiani
- Function : Author
P S. Marrocchesi
- Function : Author
A. Messineo
- Function : Author
F. Palla
- Function : Author
G. Rizzo
- Function : Author
G. Sanguinetti
- Function : Author
G. Sguazzoni
- Function : Author
R. Tenchini
- Function : Author
C. Vannini
- Function : Author
A. Venturi
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P G. Verdini
- Function : Author
G A. Blair
- Function : Author
G. Cowan
- Function : Author
M G. Green
- Function : Author
T. Medcalf
- Function : Author
J A. Strong
- Function : Author
J H. von Wimmersperg-Toeller
- Function : Author
D R. Botterill
- Function : Author
R W. Clifft
- Function : Author
T R. Edgecock
- Function : Author
P R. Norton
- Function : Author
J C. Thompson
- Function : Author
B. Bloch-Devaux
- Function : Author
P. Colas
- Function : Author
S. Emery
- Function : Author
W. Kozanecki
- Function : Author
E. Lancon
- Function : Author
M C. Lemaire
- Function : Author
E. Locci
- Function : Author
P. Perez
- Function : Author
J. Rander
- Function : Author
J F. Renardy
- Function : Author
A. Roussarie
- Function : Author
J P. Schuller
- Function : Author
J. Schwindling
- Function : Author
A. Trabelsi
- Function : Author
B. Vallage
- Function : Author
S N. Black
- Function : Author
J H. Dann
- Function : Author
R P. Johnson
- Function : Author
H Y. Kim
- Function : Author
N. Konstantinidis
- Function : Author
a M. Litke
- Function : Author
M A. Mcneil
- Function : Author
G. Taylor
- Function : Author
C N. Booth
- Function : Author
S. Cartwright
- Function : Author
F. Combley
- Function : Author
M S. Kelly
- Function : Author
M. Lehto
- Function : Author
L F. Thompson
- Function : Author
K. Affholderbach
- Function : Author
A. Bohrer
- Function : Author
S. Brandt
- Function : Author
C. Grupen
- Function : Author
J. Hess
- Function : Author
C. Koob
- Function : Author
A. Misiejuk
- Function : Author
G. Prange
- Function : Author
U. Sieler
- Function : Author
G. Giannini
- Function : Author
B. Gobbo
- Function : Author
J E. Rothberg
- Function : Author
S. Wasserbaech
- Function : Author
S R. Armstrong
- Function : Author
P. Elmer
- 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
- Function : Author
P A. Mcnamara
- Function : Author
J. Nielsen
- Function : Author
W. Orejudos
- Function : Author
y B. Pan
- Function : Author
Y. Saadi
- Function : Author
I J. Scott
- Function : Author
J. Walsh
- Function : Author
S L. Wu
- Function : Author
X. Wu
- Function : Author
- PersonId : 829304
G. Zobernig
- Function : Author
Abstract
The production rates of D*+-, Ds*+-, D+-, D0 / D0bar, Ds+, and Lambda_c in Z to ccbar decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D*+- is well described as the sum of three contributions: charm hadronisation, b hadron decays and gluon splitting into a pair of heavy quarks. The probability for a c quark to hadronise into a D*+ is found to be f(c to D*+) = 0.233 +- 0.010 (stat.) +- 0.011 (syst.). The average fraction of the beam energy carried by D*+- mesons in Z to cc events is measured to be X_E (D*+-) _cc = 0.4878 +- 0.0046 (stat.) +- 0.0061 (syst.). The D*+- energy and the hemisphere mass imbalance distributions are simultaneously used to measure the fraction of hadronic Z decays in which a gluon splits to a cc pair: n_{gluon to cc} = (3.23 +- 0.48 (stat.) +- 0.53 (syst.) %. The ratio of the Vector/(Vector+Pseudoscalar) production rates in charmed mesons is found to be P_V = 0.595 +- 0.045. The fractional decay width of the Z into cc pairs is determined from the sum of the production rates for various weakly decaying charmed states to be Rc = 0.1738 +- 0.0047 (stat.) +- 0.0116 (syst.).
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