Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-06-08
Physics
High Energy Physics
High Energy Physics - Phenomenology
Lepton Photon Symposium 2001, Rome, 5 pages, plain tex, 1 ps figure
Scientific paper
A method using jets is investigated for detecting the Higgs boson at LHC in the mass range about 114 \GeVc2, suggested by LEP experiments. Higgs bosons are produced in association with a $t \bar{t}$ pair, and both t and $\bar{t}$ decay semileptonically to reduce the QCD background. After appropriate cuts, the signal is compared with the main background, $t \bar{t} + 2$ jets. This estimate, using a reasonable approximation for the dominant background $t\bar {t}gg$, suggests a $5.1\sigma$ effect. This method is seen to be complimentary to the two gamma signal. The $t\bar{t}Z$ channel, with Z decaying to $l^+ l^-$, may be used to reduce theoretical uncertainties in determining the $t \bar{t}H$ signal.
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