A minimal set of top-Higgs anomalous couplings
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Higgs bosonLHC (Large Hadron Collider)
Aguilar-Saavedra, J.A. A minimal set of top-Higgs anomalous couplings. Nuclear Physics B, 821(1-2): 215-227 (2009). [http://hdl.handle.net/10481/30592]
PatrocinadorThis work has been supported by a MEC Ramón y Cajal contract, MEC project FPA2006-05294 and Junta de Andalucía projects FQM 101 and FQM 437.
We use the equations of motion to simplify the general form of fermion-fermion-Higgs interactions generated by dimension-six gauge-invariant effective operators. After removing redundant operators it is found that the most general H f_i f_j vertex for off-shell fermions f_i, f_j and an off-shell Higgs boson only involves scalar and pseudo-scalar terms, without derivatives. Examples are presented for the Htt and Htq interactions, where q=u,c, giving the explicit expressions of the vertices in terms of gauge-invariant operators. The new operator equalities obtained here also reduce the number of operators relevant for the Ztq vertices, although the general form of these interactions is not simplified with respect to previous results.