Search for single b*-quark production with the ATLAS detector at sqrt(s)=7 TeV
G. Aad
,
S. Albrand
(1)
,
M.L. Andrieux
(1)
,
Q. Buat
(1)
,
B. Clement
(1)
,
J. Collot
(1)
,
S. Crépé-Renaudin
(1)
,
B. Dechenaux
(1)
,
T. Delemontex
(1)
,
P.A. Delsart
(1)
,
M.H. Genest
(1)
,
J.Y. Hostachy
(1)
,
E. Laisne
(1)
,
F. Ledroit-Guillon
(1)
,
A. Lleres
(1)
,
A. Lucotte
(1)
,
F. Malek
(1)
,
J. Stark
(1)
,
X. Sun
(1)
,
B. Trocmé
(1)
,
C. Weydert
(1)
,
C. Biscarat
(2)
,
G. Rahal
(2)
,
D. Boumediene
(3)
,
Emmanuel Busato
(3)
,
D. Calvet
(3)
,
S. Calvet
(3)
,
Reina Coromoto Camacho Toro
(3)
,
Diane Cinca
(3)
,
J. Donini
(3)
,
E. Dubreuil
(3)
,
Ph. Gris
(3)
,
N. Ghodbane
(3)
,
C. Guicheney
(3)
,
H. Liao
(3)
,
D. Pallin
(3)
,
Daniela Paredes Hernández
(3)
,
F. Podlyski
(3)
,
C. Santoni
(3)
,
Loïc Valery
(3)
,
F. Vazeille
(3)
,
L. Aperio Bella
(4)
,
B. Aubert
(4)
,
N. Berger
(4)
,
J. Colas
(4)
,
M. Delmastro
(4)
,
L. Di Ciaccio
(4)
,
T.K.O. Doan
(4)
,
S. Elles
(4)
,
C. Goy
(4)
,
T. Hryn'Ova
(4)
,
S. Jézéquel
(4)
,
H. Keoshkerian
(4)
,
R. Lafaye
(4)
,
J. Leveque
(4)
,
V.P. Lombardo
(4)
,
N. Massol
(4)
,
P. Perrodo
(4)
,
E. Petit
(4)
,
H. Przysiezniak
(4)
,
E. Richter-Was
(4)
,
G. Sauvage
(4)
,
E. Sauvan
(4)
,
M. Schwoerer
(4)
,
T. Todorov
(4)
,
D. Tsionou
(4)
,
I. Wingerter-Seez
(4)
,
R. Zitoun
(4)
,
S. Aoun
(5)
,
M. Barbero
(5)
,
C. P. Bee
(5)
,
C. Bertella
(5)
,
N. Bousson
(5)
,
J. C. Clémens
(5)
,
Y. Coadou
(5)
,
F. Djama
(5)
,
F. Etienne
(5)
,
L. Feligioni
(5)
,
D. Hoffmann
(5)
,
F. Hubaut
(5)
,
E.B.F.G. Knoops
(5)
,
E. Le Guirriec
(5)
,
B. Li
(5)
,
J. Maurer
(5)
,
E. Monnier
(5)
,
Y. Nagai
(5)
,
J. Odier
(5)
,
P. Pralavorio
(5)
,
A. Rozanov
(5)
,
M. Talby
(5)
,
N. Tannoury
(5)
,
E. Tiouchichine
(5)
,
S. Tisserant
(5)
,
J. Toth
(5)
,
F. Touchard
(5)
,
M. Ughetto
(5)
,
L. Vacavant
(5)
,
F. Vannucci
(6)
G. Aad
- Function : Author
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M.L. Andrieux
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S. Crépé-Renaudin
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B. Dechenaux
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M.H. Genest
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F. Ledroit-Guillon
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F. Malek
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B. Trocmé
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D. Calvet
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S. Calvet
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Reina Coromoto Camacho Toro
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Diane Cinca
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Daniela Paredes Hernández
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N. Berger
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C. Goy
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T. Hryn'Ova
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S. Jézéquel
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Y. Coadou
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E. Monnier
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Abstract
The results of a search for an excited bottom-quark b* in pp collisions at sqrt(s)=7 TeV, using 4.7/fb of data collected by the ATLAS detector at the LHC are presented. In the model studied, a single b*-quark is produced through a chromomagnetic interaction and subsequently decays to a W boson and a top-quark. The search is performed in the dilepton and lepton+jets final states, which are combined to set limits on b*-quark couplings for a range of b*-quark masses. For a benchmark with unit size chromomagnetic and Standard Model-like electroweak b* couplings, b*-quarks with masses less than 870 GeV are excluded at the 95% credibility level.