161 citations · 774 across the 17 of their papers we have counts for
17 papers · 1 filter
Penguin contributions to CP phases in decays to charmonium
Philipp Frings, Ulrich Nierste, Martin Wiebusch
The precision of the CP phases and determined from the mixing-induced CP asymmetries in and , respectively, is limited by the unknown long-…
New physics effects in tree-level decays
Joachim Brod, Alexander Lenz, Gilberto Tetlalmatzi-Xolocotzi +1
We critically review the assumption that no new physics is acting in tree-level -meson decays and study the consequences for the ultimate precision in the direct determination o…
HEPMath 1.4: A Mathematica Package for Semi-Automatic Computations in High Energy Physics
Martin Wiebusch
This article introduces the Mathematica package \emph{HEPMath} which provides a number of utilities and algorithms for High Energy Physics computations in Mathematica. Its function…
The Dimension Six Triple Gluon Operator in Higgs+Jet Observables
Diptimoy Ghosh, Martin Wiebusch
Recently a lot of progress has been made towards a full classification of new physics effects in Higgs observables by means of effective dimension six operators. Specifically, Higg…
Benchmarks for Higgs Pair Production and Heavy Higgs Searches in the Two-Higgs-Doublet Model of Type II
Julien Baglio, Otto Eberhardt, Ulrich Nierste +1
The search for additional Higgs particles and the exact measurements of Higgs (self-) couplings is a major goal of future collider experiments. In this paper we investigate the pos…
Status of the two-Higgs-doublet model of type II
Otto Eberhardt, Ulrich Nierste, Martin Wiebusch
We determine the allowed parameter space of the CP-conserving two-Higgs-doublet model (2HDM) of type II with a softly broken Z_2 symmetry. Our analysis includes theoretical constra…
Heavy MSSM Higgs production at the LHC and decays to WW,ZZ at higher orders
Patrick Gonzalez, Sophy Palmer, Martin Wiebusch +1
In this paper we discuss the production of a heavy scalar MSSM Higgs boson H and its subsequent decays into pairs of electroweak gauge bosons WW and ZZ. We perform a scan over the…
Impact of a Higgs boson at a mass of 126 GeV on the standard model with three and four fermion generations
Otto Eberhardt, Geoffrey Herbert, Heiko Lacker +4
We perform a comprehensive statistical analysis of the standard model (SM) with three and four generations using the latest Higgs search results from LHC and Tevatron, the electrow…
Numerical Computation of p-values with myFitter
Martin Wiebusch
Likelihood ratio tests are a widely used method in global analyses in particle physics. The computation of the statistical significance (p-value) of these tests is usually done wit…
Status of the fourth fermion generation before ICHEP2012: Higgs data and electroweak precision observables
Otto Eberhardt, Alexander Lenz, Andreas Menzel +2
We perform a global fit of the parameters of the Standard Model with a sequential fourth generation (SM4) to LHC and Tevatron Higgs data and electroweak precision data. Using sever…
Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation
Otto Eberhardt, Geoffrey Herbert, Heiko Lacker +4
We analyse the impact of LHC and Tevatron Higgs data on the viability of the Standard Model with a sequential fourth generation (SM4), assuming Dirac neutrinos and a Higgs mass of…
MSSM corrections to the top-antitop quark forward-backward asymmetry at the Tevatron
Stefan Berge, Doreen Wackeroth, Martin Wiebusch
We study the effects of the complete supersymmetric QCD and electroweak one-loop corrections to the ttbar forward-backward asymmetry at the Fermilab Tevatron collider. We work in t…
Electroweak Precision Observables within a Fourth Generation Model with General Flavour Structure
Patrick González, Jürgen Rohrwild, Martin Wiebusch
We calculate the contributions to electroweak precision observables (EWPOs) due to a fourth generation of fermions with the most general (quark-)flavour structure (but assuming Dir…
Pseudoscalar Higgs Bosons at the LHC: Production and Decays into Electroweak Gauge Bosons Revisited
Werner Bernreuther, Patrick Gonzalez, Martin Wiebusch
We analyze and compute, within a number of standard model (SM) extensions, the cross sections for the production of a heavy neutral pseudoscalar Higgs boson/spin-zer…
Pseudoscalar Higgs Boson Decays into W and Z Bosons Revisited
Werner Bernreuther, Patrick Gonzalez, Martin Wiebusch
We examine, in a number of Standard Model extensions, whether the decays of a neutral pseudoscalar (Higgs) resonance can have branching ratios at the percent level an…
The Top Quark Decay Vertex in Standard Model Extensions
Werner Bernreuther, Patrick Gonzalez, Martin Wiebusch
New physics interactions can affect the strength and structure of the vertex. We investigate the magnitudes and phases of "anomalous" contributions to this vertex in a two-Hi…
MSSM Effects in Top-antitop Production at the LHC
D. A. Ross, M. Wiebusch
We report on a calculation of the effects of supersymmetry on the cross-section for top-antitop production at LHC. A numerical study is carried out for the ten benchmarks of the Sn…