4 documents found, page 1 of 1
The C2HDM revisited
Fontes, Duarte; Mühlleitner, Margarete; Romão, Jorge C.; Santos, Rui; Silva, João P.; Wittbrodt, JonasThe 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...
Large pseudoscalar Yukawa couplings in the complex 2HDM
Fontes, Duarte; Romão, Jorge C.; Santos, Rui; Silva, João P.We start by presenting the current status of a complex flavour conserving two-Higgs doublet model. We will focus on some very interesting scenarios where unexpectedly the light Higgs couplings to leptons and to b-quarks can have a large pseudoscalar component with a vanishing scalar component. Predictions for the allowed parameter space at end of the next run with a total collected luminosity of 300 fb(-1) and ...
Undoubtable signs of CP-violation in Higgs boson decays at the LHC run 2
Fontes, Duarte; Romão, Jorge C.; Santos, Rui; Silva, João P.With the discovery of the Higgs boson at the Large Hadron Collider the high energy physics community's attention has now turned to understanding the properties of the Higgs boson, together with the hope of finding more scalars during run 2. In this work we discuss scenarios where using a combination of three decays, involving the 125 GeV Higgs boson, the Z boson and at least one more scalar, an indisputable sig...
A resource for signs and Feynman diagrams of the standart model
Romão, Jorge C.; Silva, João P.When performing a full calculation within the standard model (SM) or its extensions, it is crucial that one utilizes a consistent set of signs for the gauge couplings and gauge fields. Unfortunately, the literature is plagued with differing signs and notations. We present all SM Feynman rules, including ghosts, in a convention-independent notation, and we table the conventions in close to 40 books and reviews.