Search for the Higgs boson in the H->WW->lnujj decay channel at sqrt(s) = 7 TeV with the ATLAS detector

G. Aad S. Albrand 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 J. Wang 1 C. Weydert 1 C. Biscarat 2 E. Cogneras 2 G. Rahal 2 H. Abreu 3 H. Bachacou 4 N. Besson 4 J.-B. Blanchard 3 N.M. Bolnet 4 E. Chareyre 5 L. Chevalier 4 F. Derue 5 J. Ernwein 4 A.I. Etienvre 4 A. Formica 4 L. Gauthier 4 P.F. Giraud 4 C. Guyot 4 S. Hassani 4 W. Kozanecki 4 M.W. Krasny 5 D. Lacour 5 B. Laforge 5 E. Lancon 4 S. Laplace 5 J.F. Laporte 4 O. Le Dortz 5 M. Legendre 4 C. Maiani 4 P. Mal 4 B. Mansoulie 4 G. Marchiori 5 J.-P. Meyer 4 L. Mijovic 4 V. Nguyen Thi Hong 4 R. Nicolaidou 4 I. Nikolic-Audit 5 A. Ouraou 4 B. Resende 4 M. Ridel 5 L. Roos 5 C.R. Royon 4 Ph. Schune 4 Ph. Schwemling 5 J. Schwindling 4 O. Simard 4 T. Theveneaux-Pelzer 5 H. Torres 5 S. Trincaz-Duvoid 5 M. Virchaux 4 N. Vranjes 4 M. Xiao 4 S. Aoun 6 C. P. Bee 6 C. Bertella 6 N. Bousson 6 J. C. Clémens 6 Y. Coadou 6 F. Djama 6 F. Etienne 6 L. Feligioni 6 D. Hoffmann 6 F. Hubaut 6 E. B. F. G. Knoops 6 E. Le Guirriec 6 B. Li 6 J. Maurer 6 E. Monnier 6 J. Odier 6 P. Pralavorio 6 Z. Qian 6 A. Rozanov 6 M. Talby 6 N. Tannoury 6 S. Tisserant 6 J. Toth 6 F. Touchard 6 L. Vacavant 6 D. Boumediene 7 E. Busato 7 D. Calvet 7 S. Calvet 7 R. Camacho Toro 7 Diane Cinca 8 J. Donini 7 R. Febbraro 7 N. Ghodbane 7 C. Guicheney 7 H. Liao 7 D. Pallin 7 D. Paredes Hernandez 7 F. Podlyski 7 C. Santoni 7 F. Vazeille 7 F. Vannucci 9 L. Aperio Bella 10 B. Aubert 10 N. Berger 10 J. Colas 10 M. Delmastro 10 L. Di Ciaccio 10 T.K.O. Doan 10 S. Elles 10 C. Goy 10 T. Hryn'Ova 10 A. Jérémie 10 S. Jézéquel 10 M. Kataoka 10 J. Labbe 10 R. Lafaye 10 J. Leveque 10 V.P. Lombardo 10 N. Massol 10 P. Perrodo 10 E. Petit 10 H. Przysiezniak 10 E. Richter-Was 10 G. Sauvage 10 E. Sauvan 10 M. Schwoerer 10 T. Todorov 10 D. Tsionou 10 I. Wingerter-Seez 10 R. Zitoun 10
Abstract : A search for the Standard Model Higgs boson has been performed in the H->WW->lnujj channel using 4.7 fb^-1 of pp collision data recorded at a centre-of-mass energy of sqrt(s) = 7 TeV with the ATLAS detector at the Large Hadron Collider. Higgs boson candidates produced in association with zero, one or two jets are included in the analysis to maximize the acceptance for both gluon fusion and weak boson fusion Higgs boson production processes. No significant excess of events is observed over the expected background and limits on the Higgs boson production cross section are derived for a Higgs boson mass in the range 300 GeV < mH < 600 GeV. The best sensitivity is reached for mH = 400 GeV, where the observed (expected) 95% confidence level upper bound on the cross section for H->WW produced in association with zero or one jet is 2.2 pb (1.9 pb), corresponding to 1.9 (1.6) times the Standard Model prediction. In the Higgs boson plus two jets channel, which is more sensitive to the weak boson fusion process, the observed (expected) 95% confidence level upper bound on the cross section for H->WW production with mH = 400 GeV is 0.7 pb (0.6 pb), corresponding to 7.9 (6.5) times the Standard Model prediction.
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Journal articles
Physics Letters B, Elsevier, 2012, 718, pp.391-410. <10.1016/j.physletb.2012.10.066>


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Submitted on : Wednesday, June 27, 2012 - 8:00:47 AM
Last modification on : Wednesday, June 27, 2012 - 8:00:47 AM

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G. Aad, S. Albrand, Q. Buat, B. Clement, J. Collot, et al.. Search for the Higgs boson in the H->WW->lnujj decay channel at sqrt(s) = 7 TeV with the ATLAS detector. Physics Letters B, Elsevier, 2012, 718, pp.391-410. <10.1016/j.physletb.2012.10.066>. <in2p3-00712411>

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