output
20012017
most citedElliptic flow of charged particles in Pb-Pb collisions at 2.76 TeV

876 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions
Showing hep-phShow all

12 papers · 1 filter

hep-ph2016

CP Violation in the scalar sector

D. Emmanuel-Costa, O. M. Ogreid, P. Osland +1

Models with an extended scalar sector may in principle provide new sources of CP violation originating in the scalar potential. One of the simplest ways to implement this idea is t…

hep-ph2016★ 30 cited

CP-Violation in the and vertices at colliders in Two-Higgs-Doublet Models

B. Grzadkowski, O. M. Ogreid, P. Osland

We discuss possibilities of measuring CP violation in the Two-Higgs-Doublet Model by studying effects of one-loop generated and vertices. We discuss a set of CP-sensiti…

hep-ph2016★ 31 cited

Spontaneous symmetry breaking in the -symmetric scalar sector

D. Emmanuel-Costa, O. M. Ogreid, P. Osland +1

We present a detailed study of the vacua of the -symmetric three-Higgs-doublet potential, specifying the region of parameters where these minimisation solutions occur. We work…

hep-ph2014★ 50 cited

Measuring CP violation in Two-Higgs-Doublet models in light of the LHC Higgs data

B. Grzadkowski, O. M. Ogreid, P. Osland

In Two-Higgs-Doublet models, the conditions for CP violation can be expressed in terms of invariants under U(2) rotations among the two SU(2) Higgs doublet fields. In order to desi…

hep-ph2013★ 23 cited

Diagnosing CP properties of the 2HDM

B. Grzadkowski, O. M. Ogreid, P. Osland

We have investigated a Two-Higgs-Doublet Model (2HDM), focusing on CP violation. Various scenarios with spontaneous and explicit breaking of CP have been considered. Some features…

hep-ph2011★ 1 cited

Update on the CP-Violating Inert-Doublet Model

B. Grzadkowski, O. M. Ogreid, P. Osland +2

We have updated a recently proposed extension of the Inert Doublet Model. The extension amounts to the addition of an extra non-inert scalar doublet. The model thus offers a possib…

hep-ph2010★ 32 cited

Exploring the CP-Violating Inert-Doublet Model

B. Grzadkowski, O. M. Ogreid, P. Osland +2

We have explored properties of an extension of the Inert Doublet Model by the addition of an extra non-inert scalar doublet. The model offers a possibility of CP violation in the s…

hep-ph2009★ 59 cited

Natural Multi-Higgs Model with Dark Matter and CP Violation

B. Grzadkowski, O. M. Ogreid, P. Osland

We explore an extension of the Inert Doublet Model which allows also for CP violation in the Higgs sector. This necessitates two non-inert doublets. The lightest neutral scalar of…

hep-ph2008★ 401 cited

The oblique parameters in multi-Higgs-doublet models

W. Grimus, L. Lavoura, O. M. Ogreid +1

We present general expressions for the oblique parameters S, T, U, V, W, and X in the SU(2)xU(1) electroweak model with an arbitrary number of scalar SU(2) doublets, with hyperchar…

hep-ph2007★ 275 cited

A precision constraint on multi-Higgs-doublet models

W. Grimus, L. Lavoura, O. M. Ogreid +1

We derive a general expression for Delta rho (or, equivalently, for the oblique parameter T) in the SU(2) x U(1) electroweak model with an arbitrary number of scalar SU(2) doublets…

hep-ph2007★ 119 cited

Constraining the Two-Higgs-Doublet-Model parameter space

Abdul Wahab El Kaffas, Odd Magne Ogreid, Per Osland

We confront the Two-Higgs-Doublet Model with a variety of experimental constraints as well as theoretical consistency conditions. The most constraining data are the \bar B\to X_sγd…

hep-ph2006★ 112 cited

Consistency of the Two Higgs Doublet Model and CP violation in top production at the LHC

Abdul Wahab El Kaffas, Wafaa Khater, Odd Magne Ogreid +1

It is important to provide guidance on whether CP violation may be measurable in top-quark production at the Large Hadron Collider. The present work extends an earlier analysis of…