Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-05-02
Phys.Lett. B567 (2003) 259-264
Physics
High Energy Physics
High Energy Physics - Phenomenology
Two tables added for the ratio of signal/background
Scientific paper
10.1016/j.physletb.2003.06.042
We have adopted two Higgs doublet models to study the production of a Higgs pseudoscalar ($A^0$) in association with a $Z$ gauge boson from gluon fusion ($gg \to ZA^0$) at the CERN Large Hadron Collider. The prospects for the discovery of $ZA^0 \to \ell \bar{\ell} b\bar{b}$ are investigated with physics backgrounds and realistic cuts. Promising results are found for $m_A \alt 260$ GeV in two Higgs doublet models when the heavier Higgs scalar ($H^0$) can decay into a $Z$ boson and a Higgs pseudoscalar ($A^0$). Although the cross section of $gg \to ZA^0$ is usually small in the minimal supersymmetric standard model, it can be significantly enhanced in general two Higgs doublet models. This discovery channel might provide an opportunity to search for a Higgs scalar and a Higgs pseudoscalar simultaneously at the LHC and could lead to new physics beyond the Standard Model and the minimal supersymmetric model.
Kao Chi-Chang
Lovelace Geoffrey
Orr Lynne
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