Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2012-04-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 8 figures
Scientific paper
We first build a minimal model of vector-like quarks where the dominant Higgs boson production process at LHC -- the gluon fusion -- can be significantly suppressed, being motivated by the recent stringent constraints from the search for direct Higgs production over a wide Higgs mass range. Within this model, compatible with the present experimental constraints on direct Higgs searches, we demonstrate that the Higgs ($h$) production via a heavy vector-like top-partner ($t_2$) decay, $pp \to t_2 \bar t_2$, $t_2\to t h$, allows to discover a Higgs boson at the LHC and measure its mass, through the decay channels $h\to \gamma\gamma$ or $h\to ZZ$. We also comment on the recent hint in LHC data from a possible $\sim 125$ GeV Higgs scalar, in the presence of heavy vector-like top quarks.
Azatov Aleksandr
Bondu O.
Falkowski Adam
Felcini Marta
Gascon-Shotkin S.
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