Journal articles
Measurement of the cross section ratio sigma(t t-bar b b-bar) / sigma(t t-bar jj) in pp collisions at sqrt(s) = 8 TeV
V. Khachatryan
M. Besancon
1
F. Couderc
1
M. Dejardin
1
D. Denegri
1
B. Fabbro
1
J.L. Faure
1
C. Favaro
1
F. Ferri
1
S. Ganjour
1
A. Givernaud
1
P. Gras
1
G. Hamel De Monchenault
1
P. Jarry
1
E. Locci
1
J. Malcles
1
J. Rander
1
A. Rosowsky
1
M. Titov S. Baffioni
F. Beaudette
2
P. Busson
2
C. Charlot
2
T. Dahms
2
M. Dalchenko
2
L. Dobrzynski
2
N. Filipovic
2
A. Florent
2
R. Granier De Cassagnac
2
L. Mastrolorenzo
2
P. Mine
2
C. Mironov
2
I.N. Naranjo
2
M. Nguyen
2
C. Ochando
2
P. Paganini
2
S. Regnard
2
R. Salerno
2
J.B. Sauvan
2
Y. Sirois
2
C. Veelken
2
Y. Yilmaz
2
A. Zabi J.-L. Agram
J. Andrea
3
A. Aubin
3
D. Bloch
3
J.-M. Brom
3
E.C. Chabert
3
C. Collard
3
E. Conte
3
J.-C. Fontaine
3
D. Gele
3
U. Goerlach
3
C. Goetzmann
3
A.-C. Le Bihan
3
H. Xiao
4
S. Viret
4
P. van Hove
3
R. Chierici
4
P. Verdier
4
S. Beauceron
4
N. Beaupere
4
G. Boudoul
4
E. Bouvier
4
S. Brochet
4
C.A. Carrillo Montoya
4
J. Chasserat
4
S. Gadrat
5
D. Contardo
4
P. Depasse
4
H. El Mamouni
4
J. Fan
4
J. Fay
4
S. Gascon
4
M. Gouzevitch
4
B. Ille
4
T. Kurca
4
M. Lethuillier
4
L. Mirabito
4
S. Perries
4
J.D. Ruiz Alvarez
4
D. Sabes
4
L. Sgandurra
4
V. Sordini
4
M. Vander Donckt
4
J. Rander 1
Author
A. Rosowsky 1
Author
M. Titov S. Baffioni
Author IdHAL : stephanie-barrillon ORCID : https://orcid.org/0000-0002-7075-1673
F. Beaudette 2
Author
L. Dobrzynski 2
Author
N. Filipovic 2
Author
A. Florent 2
Author
R. Granier De Cassagnac 2
Author IdHAL : raphgrandecass arXiv : https://arxiv.org/a/rgdc ORCID : https://orcid.org/0000-0002-1275-7292
M. Nguyen 2
Author
C. Ochando 2
Author
P. Paganini 2
Author IdHAL : pascal-paganini ORCID : https://orcid.org/0000-0001-9580-683X
S. Regnard 2
Author
M. Lethuillier 4
Author IdHAL : morgan-lethuillier ORCID : https://orcid.org/0000-0001-6185-2045
L. Mirabito 4
Author
S. Perries 4
Author
J.D. Ruiz Alvarez 4
Author
D. Sabes 4
Author
L. Sgandurra 4
Author
V. Sordini 4
Author IdHAL : viola-sordini ORCID : https://orcid.org/0000-0003-0885-824X
M. Vander Donckt 4
Author
1
IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (CEA Saclay
F-91191 Gif sur Yvette cedex - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/IRFU (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
2
LLR - Laboratoire Leprince-Ringuet (Route de Saclay - 91128 Palaiseau Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- X - École polytechnique (École polytechnique, 91128 Palaiseau Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7638 (France)
3
IPHC - Institut Pluridisciplinaire Hubert Curien (23 rue Loess - BP 28 67037 Strasbourg Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- UNISTRA - Université de Strasbourg (4 rue Blaise Pascal - CS 90032 - 67081 Strasbourg cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7178 (France)
4
IPNL - Institut de Physique Nucléaire de Lyon (Campus LyonTech-la Doua
Bâtiment Paul DIRAC
4 Rue Enrico Fermi
69622 Villeurbanne Cedex - France)
- UCBL - Université Claude Bernard Lyon 1 (43, boulevard du 11 novembre 1918, 69622 Villeurbanne cedex - France)
- Université de Lyon (92 rue Pasteur - CS 30122, 69361 Lyon Cedex 07 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5822 (France)
5
CC-IN2P3 - Centre de Calcul de l'IN2P3 (Domaine scientifique de La Doua
43 bd du 11 Novembre 1918
69622 Villeurbanne Cedex - France)
Abstract : The first measurement of the cross section ratio sigma(t t-bar b b-bar) / sigma(t t-bar jj) is presented using a data sample corresponding to an integrated luminosity of 19.6 inverse femtobarns collected in pp collisions at sqrt(s) = 8 TeV with the CMS detector at the LHC. Events with two leptons (e or mu) and four reconstructed jets, including two identified as b quark jets, in the final state are selected. The ratio is determined for a minimum jet transverse momentum pt of both 20 and 40 GeV. The measured ratio is 0.022 +/- 0.003 (stat) +/- 0.005 (syst) for pt > 20 GeV. The absolute cross sections sigma(t t-bar b b-bar) and sigma(t t-bar jj) are also measured. The measured ratio for pt > 40 GeV is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order.
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Journal articles
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http://hal.in2p3.fr/in2p3-01089360
Contributor : Dominique Girod <>
Submitted on : Monday, December 1, 2014 - 3:42:26 PM
Last modification on : Wednesday, November 25, 2020 - 4:10:43 PM
Contributor : Dominique Girod <>
Submitted on : Monday, December 1, 2014 - 3:42:26 PM
Last modification on : Wednesday, November 25, 2020 - 4:10:43 PM
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- HAL Id : in2p3-01089360, version 1
- ARXIV : 1411.5621
- DOI : 10.1016/j.physletb.2015.04.060
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V. Khachatryan, M. Besancon, F. Couderc, M. Dejardin, D. Denegri, et al.. Measurement of the cross section ratio sigma(t t-bar b b-bar) / sigma(t t-bar jj) in pp collisions at sqrt(s) = 8 TeV. Physics Letters B, Elsevier, 2015, 746, pp.132-153. ⟨10.1016/j.physletb.2015.04.060⟩. ⟨in2p3-01089360⟩
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