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Physics Letters B 716 (2012) 285-293
Search for the standard model Higgs boson in the ZH->vvbb channel in 9.5 fb-1 of ppbar collisions at sqrt(s) = 1.96 TeV
V.M. Abazov, M. C. Cousinou1, A. Duperrin1, W. Geng1, E. Kajfasz1, S. Kermiche1, E. Nagy1, N. Osman1, G. Grenier2, T. Kurca2, P. Lebrun2, P. Verdier2, J.-F. Grivaz3, T. Guillemin3, M. Jaffré3, P. Pétroff3, H. Li4, G. Sajot4, J. Stark4, G. Bernardi5, D. Brown5, J. Brown5, Y. Enari5, S. Greder6, J. Lellouch5, I. Ripp-Baudot6, F. Badaud7, P. Gay7, Gris Ph.7
D0 Collaboration(s)
(2012)

We present a search for the standard model Higgs boson in 9.5 fb-1 of ppbar collisions at sqrt(s) = 1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. The final state considered contains a pair of b jets and is characterized by an imbalance in transverse energy, as expected from ppbar->ZH->vvbb production. The search is also sensitive to the WH->lvbb channel when the charged lepton is not identified. The data are found to be in good agreement with the expected background. For a Higgs boson mass of 125 GeV, we set a limit at the 95% C.L. on the cross section sigma(ppbar->[Z/W]H), assuming standard model branching fractions, that is a factor of 4.3 times larger than the theoretical standard model value, while the expected factor is 3.9. The search is also used to measure a combined WZ and ZZ production cross section that is a factor of 0.94 ± 0.31(stat) ± 0.34(syst) times the standard model prediction of 4.4 pb, with an observed significance of 2.0 standard deviations.
1 :  CPPM - Centre de Physique des Particules de Marseille
2 :  IPNL - Institut de Physique Nucléaire de Lyon
3 :  LAL - Laboratoire de l'Accélérateur Linéaire
4 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
5 :  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
6 :  IPHC - Institut Pluridisciplinaire Hubert Curien
7 :  LPC-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand
Physique/Physique des Hautes Energies - Expérience
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1207.5689