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Combined search for the standard model Higgs boson decaying to b bbar using the D0 Run II data set

By V.M. Abazov, U. Bassler, G. Bernardi, M. Besançon, D. Brown, J. Brown, E. Chapon, S. Chevalier-Théry, F. Couderc, A. Croc, F. Deliot, C. Deterre, Y. Enari, S. Greder, G. Grenier, A. Grohsjean, T. Kurca, P. Lebrun, J. Lellouch, R. Madar, F. Miconi, I. Ripp-Baudot, C. Royon, V. Shary, M. Titov, B. Tuchming, P. Verdier, D. Vilanova, H. Li, G. Sajot, J. Stark, J.-F. Grivaz, T. Guillemin, M. Jaffré, P. Pétroff, F. Badaud, Pascal Gay, Ph. Gris, M. C. Cousinou, A. Duperrin, W. Geng, E. Kajfasz, S. Kermiche, E. Nagy and N. Osman

Abstract

submitted to Phys. Rev. Lett ; see paper for full list of authorsWe present the results of the combination of searches for the standard model Higgs boson produced in association with a W or Z boson and decaying into b bbar using the data sample collected with the D0 detector in p pbar collisions at sqrt{s}=1.96 TeV at the Fermilab Tevatron Collider. We derive 95% CL upper limits on the Higgs boson cross section relative to the standard model prediction in the mass range 100 GeV <= M_H <= 150 GeV, and we exclude Higgs bosons with masses smaller than 102 GeV at the 95% CL. In the mass range 120 GeV <= M_H <= 145 GeV the data exhibit an excess above the background prediction with a global significance of 1.5 standard deviations, consistent with the expectation in the presence of a standard model Higgs boson

Topics: [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: American Physical Society
Year: 2012
DOI identifier: 10.1103/PhysRevLett.109.121802
OAI identifier: oai:HAL:in2p3-00721884v1
Provided by: Hal-Diderot
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