Probing top-Higgs non-standard interactions at the LHC

• DOI: 10.1007/jhep07(2012)036
• Publication Date: 2012-07-06T02:17:09Z
• Authors: C. Degrande; J.-M. Gérard; C. Grojean; F. Maltoni; G. Servant
• Keywords: Nuclear and High Energy Physics; High Energy Physics - Phenomenology; Beyond standard model; Higgs physics; Nuclear and High Energy Physics; High Energy Physics - Phenomenology (hep-ph); 0103 physical sciences; FOS: Physical sciences; 7. Clean energy; 01 natural sciences

Abstract

Effective interactions involving both the top quark and the Higgs field are among the least constrained of all possible (gauge invariant) dimension-six operators in the Standard Model. Such a handful of operators, in particular the top quark chromomagnetic dipole moment, might encapsulate signs of the new physics responsible for electroweak symmetry breaking. In this work, we compute the contributions of these operators to inclusive Higgs and $ t\overline t h $ productions. We argue that: i) rather strong constraints on the overall size of these operators can already be obtained from the current limits/evidence on Higgs production at the LHC; ii) $ t\overline t h $ production will provide further key information that is complementary to $ t\overline t $ measurements, and the possibility of discriminating among different contributions by performing accurate measurements of total and differential rates.