Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-10-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 19 figures, version accepted for publication in European Physical Jounal C
Scientific paper
We study the impact of dimension-six operators on single- and double-Higgs production rates via gluon fusion at the Large Hadron Collider (LHC). If the top-Yukawa coupling is modified by some new physics whose scale is of the TeV scale, its effect changes the cross sections of single-Higgs production $gg\to H$ and double-Higgs production $gg\to HH$ through the top-loop diagram. In particular, double-Higgs production can receive significant enhancement from the effective top-Yukawa coupling and the new dimension-five coupling $t{\bar t}HH$ which are induced by the dimension-six operator. Comparing these results to the forthcoming data at the LHC, one can extract information of the dimension-six operators relevant to the top quark and the Higgs boson.
Kanemura Shinya
Tsumura Koji
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