Search for $\gamma\gamma$ decays of a Higgs boson produced in association with a fermion pair in $e^+ e^-$ collisions at LEP
R. Barate
(1)
,
D. Decamp
(1)
,
P. Ghez
(1)
,
C. Goy
(1)
,
S. Jezequel
(1)
,
J P. Lees
(1)
,
F. Martin
(1)
,
E. Merle
(1)
,
M N. Minard
(1)
,
B. Pietrzyk
(1)
,
S. Bravo
,
M P. Casado
,
M. Chmeissani
,
J M. Crespo
,
E. Fernandez
,
M. Fernandez-Bosman
,
L. Garrido
,
E. Grauges
,
J. Lopez
,
M. Martinez
,
G. Merino
,
R. Miquel
,
L M. Mir
,
A. Pacheco
,
D. Paneque
,
H. Ruiz
,
A. Colaleo
,
D. Creanza
,
N. de Filippis
,
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
,
G. Boix
,
O. Buchmuller
,
M. Cattaneo
,
F. Cerutti
,
G. Dissertori
,
H. Drevermann
,
R W. Forty
,
M. Frank
,
F. Gianotti
,
T C. Greening
,
a W. Halley
,
J B. Hansen
,
J. Harvey
,
P. Janot
,
B. Jost
,
M. Kado
,
V. Lemaitre
,
P. Maley
,
P. Mato
,
A. Minten
,
A. Moutoussi
,
F. Ranjard
,
L. Rolandi
,
D. Schlatter
,
M. Schmitt
,
O. Schneider
,
P. Spagnolo
,
W. Tejessy
,
F. Teubert
,
E. Tournefier
,
A. Valassi
,
J J. Ward
,
a E. Wright
,
Ziad Zj Ajaltouni
(2)
,
F. Badaud
(2)
,
G. Chazelle
(2)
,
O. Deschamps
(2)
,
S. Dessagne
(2)
,
Alain Falvard
(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)
,
J M. Pascolo
(2)
,
Pascal Perret
(2)
,
F. Podlyski
(2)
,
J D. Hansen
,
J R. Hansen
,
P H. Hansen
,
B S. Nilsson
,
A. Waananen
,
G. Daskalakis
,
A. Kyriakis
,
C. Markou
,
E. Simopoulou
,
A. Vayaki
,
A. Blondel
(3)
,
J C. Brient
(3)
,
F. Machefert
(3)
,
A. Rouge
(3)
,
M. Swynghedauw
(3)
,
R. Tanaka
(3)
,
H. Videau
(3)
,
E. Focardi
,
G. Parrini
,
K. Zachariadou
,
A. Antonelli
,
M. 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
,
M. Chalmers
,
J. Kennedy
,
J G. Lynch
,
P. Negus
,
V. O'Shea
,
B. Raven
,
D. Smith
,
P. Teixeira-Dias
,
a S. Thompson
,
R. Cavanaugh
,
S. Dhamotharan
,
C. Geweniger
,
P. Hanke
,
V. Hepp
,
E E. Kluge
,
G. Leibenguth
,
A. Putzer
,
K. Tittel
,
S. Werner
,
M. Wunsch
,
R. Beuselinck
,
D M. Binnie
,
W. Cameron
,
G. Davies
,
P J. Dornan
,
M. Girone
,
N. Marinelli
,
J. Nowell
,
H. Przysiezniak
,
J K. Sedgbeer
,
J C. Thompson
,
E. Thomson
,
R. White
,
V M. Ghete
,
P. Girtler
,
E. Kneringer
,
D. Kuhn
,
G. Rudolph
,
C K. Bowdery
,
P G. Buck
,
D P. Clarke
,
G. Ellis
,
a J. Finch
,
F. Foster
,
G. Hughes
,
R W L. Jones
,
N A. Robertson
,
M. Smizanska
,
I. Giehl
,
F. Holldorfer
,
K. Jakobs
,
K. Kleinknecht
,
M. Krocker
,
a S. Muller
,
H A. Nurnberger
,
G. Quast
,
B. Renk
,
E. Rohne
,
H G. Sander
,
S. Schmeling
,
H. Wachsmuth
,
C. Zeitnitz
,
T. Ziegler
,
A. Bonissent
(4)
,
J. Carr
(4)
,
P. Coyle
(4)
,
C. Curtil
(4)
,
A. Ealet
(4)
,
D. Fouchez
(4)
,
O. Leroy
(4)
,
T. Kachelhoffer
(4)
,
P. Payre
(4)
,
D. Rousseau
(4)
,
A. Tilquin
(4)
,
M. Aleppo
,
S. Gilardoni
,
F. Ragusa
,
H. Dietl
,
G. Ganis
,
A. Heister
,
K. Huttmann
,
G. Lutjens
,
C. Mannert
,
W. Manner
,
H G. Moser
,
S. Schael
,
R. Settles
,
H. Stenzel
,
W. Wiedenmann
,
G. Wolf
,
P. Azzurri
,
J. Boucrot
(5)
,
O. Callot
(5)
,
M. Davier
(5)
,
L. Duflot
(5)
,
J F. Grivaz
(5)
,
P. Heusse
(5)
,
A. Jacholkowska
(5)
,
L. Serin
(5)
,
J J. Veillet
(5)
,
I. Videau
(5)
,
J B. de Vivie de Regie
(5)
,
D. Zerwas
(5)
,
G. Bagliesi
,
T. Boccali
,
G. Calderini
,
V. Ciulli
,
L. Foa
,
A. Giammanco
,
A. Giassi
,
F. Ligabue
,
A. Messineo
,
F. Palla
,
G. Rizzo
,
G. Sanguinetti
,
A. Sciaba
,
G. Sguazzoni
,
R. Tenchini
,
A. Venturi
,
P G. Verdini
,
G A. Blair
,
J. Coles
,
G. Cowan
,
M G. Green
,
D E. Hutchcroft
,
L T. Jones
,
T. Medcalf
,
J A. Strong
,
J H. von Wimmersperg-Toeller
,
R W. Clifft
,
T R. Edgecock
,
P R. Norton
,
I R. Tomalin
,
B. Bloch-Devaux
,
D. Boumediene
,
P. Colas
,
B. Fabbro
,
G. Faif
,
E. Lancon
,
M C. Lemaire
,
E. Locci
,
P. Perez
,
J. Rander
,
J F. Renardy
,
A. Rosowsky
,
P. Seager
,
A. Trabelsi
,
B. Tuchming
,
B. Vallage
,
S N. Black
,
J H. Dann
,
C. Loomis
,
H Y. Kim
,
N. Konstantinidis
,
a M. Litke
,
M A. Mcneil
,
G. Taylor
,
C N. Booth
,
S. Cartwright
,
F. Combley
,
P N. Hodgson
,
M. Lehto
,
L F. Thompson
,
K. Affholderbach
,
A. Bohrer
,
S. Brandt
,
C. Grupen
,
J. Hess
,
A. Misiejuk
,
G. Prange
,
U. Sieler
,
C. Borean
,
G. Giannini
,
B. Gobbo
,
H. He
,
J. Putz
,
J E. Rothberg
,
S. Wasserbaech
,
S R. Armstrong
,
K. Cranmer
,
P. Elmer
,
D P S. Ferguson
,
Y. Gao
,
S. Gonzalez
,
O J. Hayes
,
H. Hu
,
S. Jin
,
J. Kile
,
P A. Mcnamara
,
J. Nielsen
,
W. Orejudos
,
y B. Pan
,
Y. Saadi
,
I J. Scott
,
J. Walsh
,
J. Wu
,
S L. Wu
,
X. Wu
,
G. Zobernig
C. Goy
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O. Deschamps
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J D. Hansen
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E. Simopoulou
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E. Focardi
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G. Parrini
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K. Zachariadou
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A. Antonelli
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M. Antonelli
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G. Bencivenni
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G. Bologna
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F. Bossi
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P. Campana
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G. Capon
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V. Chiarella
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P. Laurelli
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G. Mannocchi
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F. Murtas
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G P. Murtas
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L. Passalacqua
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M. Pepe-Altarelli
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M. Chalmers
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J. Kennedy
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J G. Lynch
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P. Negus
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V. O'Shea
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B. Raven
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D. Smith
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P. Teixeira-Dias
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a S. Thompson
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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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E E. Kluge
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G. Leibenguth
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A. Putzer
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M. Wunsch
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M. Smizanska
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K. Kleinknecht
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M. Krocker
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a S. Muller
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B. Renk
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H G. Sander
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D. Rousseau
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M. Aleppo
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S. Gilardoni
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F. Ragusa
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H. Dietl
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G. Ganis
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A. Heister
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K. Huttmann
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G. Lutjens
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C. Mannert
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W. Manner
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H G. Moser
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S. Schael
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R. Settles
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H. Stenzel
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W. Wiedenmann
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G. Wolf
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P. Azzurri
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J B. de Vivie de Regie
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G. Bagliesi
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A. Giammanco
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F. Ligabue
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F. Palla
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G. Rizzo
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G. Sanguinetti
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G. Sguazzoni
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P G. Verdini
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J. Coles
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G. Cowan
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M G. Green
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D E. Hutchcroft
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L T. Jones
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T. Medcalf
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J A. Strong
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J H. von Wimmersperg-Toeller
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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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D. Boumediene
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P. Colas
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A. Rosowsky
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A. Trabelsi
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B. Tuchming
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B. Vallage
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S N. Black
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J H. Dann
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C. Loomis
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H Y. Kim
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N. Konstantinidis
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a M. Litke
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M A. Mcneil
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G. Taylor
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C N. Booth
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S. Cartwright
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F. Combley
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P N. Hodgson
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M. Lehto
- Function : Author
L F. Thompson
- Function : Author
K. Affholderbach
- Function : Author
A. Bohrer
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S. Brandt
- Function : Author
C. Grupen
- Function : Author
J. Hess
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A. Misiejuk
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G. Prange
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U. Sieler
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C. Borean
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G. Giannini
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B. Gobbo
- Function : Author
H. He
- Function : Author
J. Putz
- Function : Author
J E. Rothberg
- Function : Author
S. Wasserbaech
- Function : Author
S R. Armstrong
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K. Cranmer
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P. Elmer
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D P S. Ferguson
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Y. Gao
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S. Gonzalez
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O J. Hayes
- Function : Author
H. Hu
- Function : Author
S. Jin
- Function : Author
J. Kile
- 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
J. Wu
- Function : Author
S L. Wu
- Function : Author
X. Wu
- Function : Author
- PersonId : 829304
G. Zobernig
- Function : Author
Abstract
A search for gamma-gamma decays of a Higgs boson is performed in the data sample collected at LEP with the ALEPH detector between 1991 and 1999. This corresponds to an integrated luminosity of 672 pb-1 at centre-of-mass energies ranging from 88 to 202 GeV. The search is based on topologies arising from a Higgs boson produced in association with a fermion pair via the Higgs-strahlung process e+e- -> Hff, with ff=nu\nu, e+e-, mu+mu-, tau+tau- or qq. Twenty-two events are selected in the data, while 28 events are expected from standard model processes. An upper limit is derived, as a function of the Higgs boson mass, on the product of the e+e- -> Hff cross section and the H -> gamma-gamma branching fraction. In particular, a fermiophobic Higgs boson produced with the standard model cross section is excluded at 95% confidence level for all masses below $100.7 GeV.
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