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. Cousinou
(1)
,
A. Duperrin
(1)
,
W. Geng
(1)
,
E. Kajfasz
(1)
,
S. Kermiche
(1)
,
E. Nagy
(1)
,
N. Osman
(1)
,
G. Grenier
(2)
,
T. Kurca
(2)
,
P. Lebrun
(2)
,
P. Verdier
(2)
,
J.-F. Grivaz
(3)
,
T. Guillemin
(3)
,
M. Jaffré
(3)
,
P. Pétroff
(3)
,
H. Li
(4)
,
G. Sajot
(4)
,
J. Stark
(4)
,
G. Bernardi
(5)
,
D. Brown
(5)
,
J. Brown
(5)
,
Y. Enari
(5)
,
S. Greder
(6)
,
J. Lellouch
(5)
,
I. Ripp-Baudot
(6)
,
F. Badaud
(7)
,
Pascal Gay
(7)
,
Gris Ph.
(7)
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 - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
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 - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
V.M. Abazov
- Function : Author
E. Kajfasz
- Function : Author
- PersonId : 742630
- IdHAL : eric-kajfasz
- ORCID : 0000-0002-8575-405X
- IdRef : 150389043
P. Lebrun
- Function : Author
- PersonId : 741027
- IdHAL : patrice-jean-marie-lebrun
- ORCID : 0000-0001-6115-5856
P. Verdier
- Function : Author
- PersonId : 184664
- IdHAL : patrice-verdier
- ORCID : 0000-0003-3090-2948
- IdRef : 098525859
G. Bernardi
- Function : Author
- PersonId : 1374140
- ORCID : 0000-0002-2837-2442
- IdRef : 088561623
Pascal Gay
- Function : Author
- PersonId : 829302
Abstract
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.