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Physical Review D 86 (2012) 032005
Search for $WH$ associated production in $p \bar{p}$ collisions at $\sqrt{s}=1.96\,{\rm TeV}$
V.M. Abazov, H. Li1, G. Sajot1, J. Stark1, S. Greder2, F. Miconi2, I. Ripp-Baudot2, G. Grenier3, T. Kurca3, P. Lebrun3, P. Verdier3, J.-F. Grivaz4, T. Guillemin4, M. Jaffré4, P. Pétroff4, F. Badaud5, P. Gay5, P. Gris5, M. C. Cousinou6, A. Duperrin6, W. Geng6, E. Kajfasz6, S. Kermiche6, E. Nagy6, N. Osman6
D0 Collaboration(s)
(2012)

This report describes a search for associated production of $W$ and Higgs bosons based on data corresponding to an integrated luminosity of $\cal{L}$$ \approx 5.3 \rm fb^{-1}$ collected with the D0 detector at the Fermilab Tevatron $p\bar{p}$ Collider. Events containing a $W\rightarrow \ell \nu$ candidate (with $\ell$ corresponding to $e$ or $\mu$) are selected in association with two or three reconstructed jets. One or two of the jets are required to be consistent with having evolved from a $b$ quark. A multivariate discriminant technique is used to improve the separation of signal and backgrounds. Expected and observed upper limits are obtained for the product of the $WH$ production cross section and branching ratios and reported in terms of ratios relative to the prediction of the standard model as a function of the mass of the Higgs boson ($M_{H}$). The observed and expected 95% C.L. upper limits obtained for an assumed $M_{H}=115 \rm GeV$ are, respectively, factors of 4.5 and 4.8 larger than the value predicted by the standard model.
1 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
2 :  DRS-IPHC - Département Recherches Subatomiques
3 :  IPNL - Institut de Physique Nucléaire de Lyon
4 :  LAL - Laboratoire de l'Accélérateur Linéaire
5 :  LPC-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand
6 :  CPPM - Centre de Physique des Particules de Marseille
Physique/Physique des Hautes Energies - Expérience
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1203.1082