CP violation with a dynamical Higgs

Abstract

We determine the complete set of independent gauge and gauge-Higgs CPodd effective operators for the generic case of a dynamical Higgs, up to four derivatives in the chiral expansion. The relation with the linear basis of dimension six CP-odd operators is clarified. Phenomenological applications include bounds inferred from electric dipole moment limits, and from present and future collider data on triple gauge coupling measurements and Higgs signals.

The gauge-Higgs legacy of the LHC Run I

“…The SU(2)-gauge-invariant formulation in terms of dimension-six operators induces correlations of the formerly multi-dimensional space of modified gauge couplings, [44,[51][52][53][54], the parametrization would be extended. In the most generic scenario, the couplings defined in eq.…”

The Higgs legacy of the LHC Run I

“…These ttH measurements allow us to separate an extra new contribution to the Higgs-gluon coupling, leading to the analysis with seven independent coupling modifications. After setting the two Higgs-weak-boson coupling modifications equal, these seven modifications correspond to the relevant parameters in the non-linear effective Lagrangian expansion [63][64][65][66][67], if we restrict them to the leading terms following ref. [68].…”

Study of the Electroweak Symmetry Breaking Sector for the LHC

“…Note the presence of the non-linear term 1 − (ω 2 /v 2 ). This is the main difference from linear approaches like [22][23][24][25][26][27][28][29][30][31][32][33]. The covariant derivative of the U field (eq.…”

“…In view that the h has been found, it can be extended to include the new Higgs-like particle found at the LHC (refs. [22][23][24][25][26][27][28][29][30][31][32][33]). One of the goals of this work will be to expose this extension, considering non-linear Electroweak Chiral Lagrangians as a low-energy (M W , M h √ s 3 TeV) parameterization of the new physics at the TeV scale.…”

“…The tools of Effective Chiral Lagrangians and unitarization procedures will be used, and the old Higgsless Electroweak Chiral Lagrangian [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21](EChL) will be extended to accommodate a Higgs-like boson at ∼ 125 GeV. Since the discovery of the Higgs-like boson at the LHC, this field has received increasing attention [22][23][24][25][26][27][28][29][30][31][32][33]. I hope that this dissertation, besides our original results [34][35][36][37][38][39] 1 that will be described, can be a useful introduction to the field of a strongly interacting EWSBS with a light Higgs but below the possible new-physics scale.…”