Search for the standard model Higgs boson in $\bm{\ell\nu}$+jets final states in 9.7~fb$\bm{^{-1}}$ of $\bm{p\bar{p}}$ collisions with the D0 detector

Abstract : We present, in detail, a search for the standard model Higgs boson, $H$, in final states with a charged lepton (electron or muon), missing energy, and two or more jets in data corresponding to 9.7 fb$^{-1}$ of integrated luminosity collected at a center of mass energy of $\sqrt{s}$ = 1.96 TeV with the D0 detector at the Fermilab Tevatron $p\bar{p}$ Collider. The search uses $b$-jet identification to categorize events for improved signal versus background separation and is sensitive to associated production of the $H$ with a $W$ boson, $WH\to\ell\nu b\bar{b}$; gluon fusion with the Higgs decaying to $W$ boson pairs, $H\to WW\to\ell\nu jj$; and associated production with a vector boson where the Higgs decays to $W$ boson pairs, $VH\to VWW \to \ell\nu jjjj$ production (where $V = W$ or $Z$). We observe good agreement between data and expected background. We test our method by measuring $WZ$ and $ZZ$ production with $Z\to b\bar{b}$ and find production rates consistent with the standard model prediction. For a Higgs boson mass of 125 GeV, we set a 95%\ C.L. upper limit on the production of a standard model Higgs boson of \obslimA$\times\sigma_{\rm SM}$, where $\sigma_{\rm SM}$ is the standard model Higgs boson production cross section, while the expected limit is \explimA$\times\sigma_{\rm SM}$. We also interpret the data considering models with fourth generation fermions, or a fermiophobic Higgs boson production cross section, while the expected limit is 4: 7 x sigma(SM).
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00781593
Contributor : Danielle Cristofol <>
Submitted on : Monday, January 28, 2013 - 8:26:44 AM
Last modification on : Friday, June 18, 2021 - 3:40:34 AM

Citation

V.M. Abazov, M.-C. Cousinou, A. Duperrin, W. Geng, E. Kajfasz, et al.. Search for the standard model Higgs boson in $\bm{\ell\nu}$+jets final states in 9.7~fb$\bm{^{-1}}$ of $\bm{p\bar{p}}$ collisions with the D0 detector. Physical Review D, American Physical Society, 2013, 88, pp.052008. ⟨10.1103/PhysRevD.88.052008⟩. ⟨in2p3-00781593⟩

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