Abstract
A search for the standard model Higgs boson is performed in a data sample corresponding to an integrated luminosity of 1.1 fb$^{-1}$, recorded by the CMS detector in proton-proton collisions at the LHC with a 7 TeV center-of-mass energy. The following modes are studied: W($\mu \nu$)H, W(e$\nu$)H, Z($\mu \mu$)H, Z(ee)H and Z($\nu \nu$)H, with the Higgs decaying to bb pairs. 95% C.L. upper limits on the VH production cross section are derived for a Higgs mass between 110 and 135 GeV. The expected (observed) upper limit at 115 GeV is found to be 5.7 (8.3) times the standard model expectation.
Highlights
The search for the Higgs boson [1] is currently one of the most important undertakings of experimental particle physics.At the LHC the main Higgs production mechanism is direct production through gluon fusion, with a cross section of ∼ 17 · 103 fb for a Higgs mass mH = 120 GeV [2]
A search for the standard model Higgs boson is performed in a data sample corresponding to an integrated luminosity of 1.1 fb−1, recorded by the CMS detector in proton-proton collisions at the LHC with a 7 TeV center-of-mass energy
The following modes are studied: W(μν)H, W(eν)H, Z(μμ)H, Z(ee)H and Z(νν)H, with the Higgs decaying to bb pairs. 95% C.L. upper limits on the VH production cross section are derived for a Higgs mass between 110 and 135 GeV
Summary
The search for the Higgs boson [1] is currently one of the most important undertakings of experimental particle physics. An optimization of the event selection, that depends on the Higgs mass, is performed, and 95% C.L. upper limits on the pp → V H production cross section are obtained for Higgs masses between 110-135 GeV. These limits are based on the observed event count and background estimate in signal regions defined in either the invariant mass distribution of H → bbcandidates (“M(jj) or cut-andcount analysis”), or in the output discriminant of a boosted decision tree algorithm (“BDT analysis”)[5]. For lack of space we will present here only tables and plots for the 115 GeV mass hypothesis, while only the final limits plots will contains all mass range search
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