Document details

The C2HDM revisited

Author(s): Fontes, Duarte ; Mühlleitner, Margarete ; Romão, Jorge C. ; Santos, Rui ; Silva, João P. ; Wittbrodt, Jonas

Date: 2018

Persistent ID: http://hdl.handle.net/1822/69402

Origin: RepositóriUM - Universidade do Minho

Project/scholarship: info:eu-repo/grantAgreement/FCT/5876/147214/PT;

Subject(s): Beyond Standard Model; CP violation; Higgs Physics; Science & Technology; Ciências Naturais::Ciências Físicas


Description

The complex two-Higgs doublet model is one of the simplest ways to extend the scalar sector of the Standard Model to include a new source of CP-violation. The model has been used as a benchmark model to search for CP-violation at the LHC and as a possible explanation for the matter-antimatter asymmetry of the Universe. In this work, we re-analyse in full detail the softly broken $\mathbb{Z}_2$ symmetric complex two-Higgs doublet model (C2HDM). We provide the code C2HDM_HDECAY implementing the C2HDM in the well-known HDECAY program which calculates the decay widths including the state-of-the-art higher order QCD corrections and the relevant off-shell decays. Using C2HDM_HDECAY together with the most relevant theoretical and experimental constraints, including electric dipole moments (EDMs), we review the parameter space of the model and discuss its phenomenology. In particular, we find cases where large CP-odd couplings to fermions are still allowed and provide benchmark points for these scenarios. We examine the prospects of discovering CP-violation at the LHC and show how theoretically motivated measures of CP-violation correlate with observables.

The work of D.F., J.C.R. and J.P.S. is supported in part by the Portuguese Fundacao para a Ciencia e Tecnologia (FCT) under contracts CERN/FIS-NUC/0010/2015 and UID/FIS/00777/2013. MM acknowledges financial support from the DFG project "Precision Calculations in the Higgs Sector - Paving the Way to the New Physics Landscape" (ID: MU 3138/1-1).

info:eu-repo/semantics/publishedVersion

Document Type Journal article
Language English
Contributor(s) Universidade do Minho
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