Abstract
We present a search for associated production of Higgs and W bosons in pp¯ collisions at a center of mass energy of s=1.96 TeV in 5.3 fb−1 of integrated luminosity recorded by the D0 experiment. Multivariate analysis techniques are applied to events containing one lepton, an imbalance in transverse energy, and one or two b-tagged jets to discriminate a potential WH signal from Standard Model backgrounds. We observe good agreement between data and expected backgrounds, and set an upper limit of 4.5 (at 95% confidence level and for mH=115 GeV) on the ratio of the WH cross section multiplied by the branching fraction of H→bb¯ to its Standard Model prediction, which is consistent with an expected limit of 4.8.
Highlights
We presen√t a energy of s search = 1.96 for associated production of Higgs and W bosons TeV in 5.3 fb−1 of integrated luminosity recorded in by p pcollisions at a center of mass the D0 experiment
Multivariate analysis techniques are applied to events containing one lepton, an imbalance in transverse energy, and one or two b-tagged jets to discriminate a potential W H signal from Standard Model backgrounds
Confidence level and for mH = 115 GeV) on the ratio of the W H cross section multiplied by the branching fraction of H → bbto its Standard Model prediction, which is consistent with an expected limit of 4.8
Summary
Multivariate analysis techniques are applied to events containing one lepton, an imbalance in transverse energy, and one or two b-tagged jets to discriminate a potential W H signal from Standard Model backgrounds. In events with two b-tagged jets, the dominant backgrounds are from W bb , tt, and single top-quark production.
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