DistinguishingCP-odd couplings of the Higgs boson to weak boson pairs

Abstract

We consider the observable effects of CP-violating anomalous ZZh interaction arising from gauge invariant dimension-6 operators at the Large Hadron Collider (LHC), with the purpose of distinguishing them from not only the standard model effects but also those of CP-even anomalous interactions of similar nature. The postulation of a gauge invariant origin makes various couplings of this kind interrelated. The updated constraints from the LHC as well as limits from neutron and electron dipole moments are used in selecting the benchmark interaction strengths. We use some asymmetry parameters that have no contribution from standard or CP-even anomalous interactions. Parton showering and detector level simulation is included to make our analysis as realistic as possible. On the whole, we conclude that gauge invariant interaction of strength ≥ 40/TeV 2 can be successfully isolated using integrated luminosities in the 1.5-3.0 ab −1 range.

New features in the JHU generator framework: Constraining Higgs boson properties from on-shell and off-shell production

“…The pointlike interactions g γγ 2 and g γγ 4 or g Zγ 2 and g Zγ 4 could be considered in Eqs. (40) and (41). However, following the approach in Eq.…”

“…We do not consider higher-order corrections, such as terms involving κ WW 1;2 , g WW 2 , or g WW 4 , in Eqs. (40) and (41). We also neglect the H → γ Ã γ contribution.…”

T-Odd Anomalous Interactions of the Top-Quark at the Large Hadron Collider

“…The T-violating interactions of the top-quark have already been studied in the literature for a fixed CPviolating scale in the Refs. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]; for example, CPviolation at future e + e − collider in t t production is investigated in Ref. [15], Ref.…”

Probing $$\textit{CP}$$-violating Higgs and gauge-boson couplings in the Standard Model effective field theory

“…Most studies, however, assume that the new physics contributions to the Higgs-boson couplings feature a C P-even structure, in particular when existing constraints on the effective operators are evaluated [5][6][7][8][9][10][11][12]. In comparison, the investigation of the effects of the C P-odd Higgs-boson effective operators has been relatively sparse [13][14][15][16][17][18][19], although some experimental analyses are available, e.g. [20,21].…”