Publications (30)
TESLA Technical Design Report Part III: Physics at an e+e- Linear Collider
R. -D. Heuer, D. J. Miller, F. Richard +236
The TESLA Technical Design Report Part III: Physics at an e+e- Linear Collider
Les Houches Physics at TeV Colliders 2005, Standard Model and Higgs working group: Summary report
C. Buttar, S. Dittmaier, V. Drollinger +118
This Report summarises the activities of the "SM and Higgs" working group for the Workshop "Physics at TeV Colliders", Les Houches, France, 2-20 May, 2005. On the one hand, we perf…
O(α_s^2) Corrections to Top Quark Production at Colliders
R. Harlander, M. Steinhauser
In this article we evaluate mass corrections up to to the three-loop polarization function induced by an axial-vector current. Special emphasis is put on the evalu…
Dimensional Reduction applied to QCD at three loops
R. Harlander, P. Kant, L. Mihaila +1
Dimensional Reduction is applied to \qcd{} in order to compute various renormalization constants in the \drbar{} scheme at higher orders in perturbation theory. In particular, the…
Automatic Computation of Feynman Diagrams
R. Harlander, M. Steinhauser
Quantum corrections significantly influence the quantities observed in modern particle physics. The corresponding theoretical computations are usually quite lengthy which makes the…
Higgs Decay to Top Quarks at O(α_s^2)
R. Harlander, M. Steinhauser
Three-loop corrections to the scalar and pseudo-scalar current correlator are calculated. By applying the large momentum expansion mass terms up to order (m^2/q^2)^4 are evaluated…
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties
The LHC Higgs Cross Section Working Group, S. Heinemeyer, C. Mariotti +155
This Report summarizes the results of the activities in 2012 and the first half of 2013 of the LHC Higgs Cross Section Working Group. The main goal of the working group was to pres…
Polarization in Top Quark Pair Production near Threshold
R. Harlander, M. Jeżabek, J. H. Kühn +1
The polarization dependent momentum distributions of top quarks and their decay products are calculated for production at future colliders with polarized beams.…
Two-loop matching of the chromo-magnetic dipole operator with the gradient flow
J. Borgulat, R. Harlander, M. D. Rizik +1
The chromo-magnetic dipole operator is expressed in terms of operators at finite flow time in the gradient-flow formalism. The matching coefficients are evaluated through next-to-n…
Polarization in Top Quark Production and Decay near Threshold
R. Harlander, M. Jeżabek, J. H. Kühn +1
Theoretical results are presented for top quarks produced in annihilation of polarized electrons on positrons. Polarization studies for pairs near threshold are free from…
Handbook of LHC Higgs Cross Sections: 2. Differential Distributions
LHC Higgs Cross Section Working Group, S. Dittmaier, C. Mariotti +118
This Report summarises the results of the second year's activities of the LHC Higgs Cross Section Working Group. The main goal of the working group was to present the state of the…
Automatic Computation Of Three-Loop Two-Point Functions In Large Momentum Expansion
K. G. Chetyrkin, R. Harlander, J. H. Kuehn +1
We discuss the calculation of two-point three-loop functions with an arbitrary number of massive propagators and one large external momentum. The relevant subdiagrams are generated…
Second Order QCD Corrections to
K. G. Chetyrkin, R. Harlander, T. Seidensticker +1
Corrections of to the decay of the top quark into a W boson and a bottom quark are calculated. The method is based on an expansion of the top quark propagator for small…
Quark mass effects to Ï(e^+e^- -> hadrons) at O(α_s^3)
K. G. Chetyrkin, R. Harlander, J. H. Kuehn
The calculation of the quartic mass terms at order α_s^3 to the hadronic R ratio is described. It is based on the operator product expansion for the quark current correlator, comb…
Top production above threshold: Electroweak and QCD corrections combined
J. Kuehn, T. Hahn, R. Harlander
Top quark production in electron-positron annihilation is one of the benchmark reactions at a future linear collider. Both electroweak and QCD corrections are large, amounting to 1…
Higgs-mass predictions in the MSSM and beyond
P. Slavich, S. Heinemeyer, E. Bagnaschi +36
Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions of the Standard Model, where they play a crucial role in constraining the parameter space. T…
The Higgs Working Group: Summary Report 2003
K. A. Assamagan, M. Narain, A. Nikitenko +81
Theoretical progress in Higgs boson production and background processes is discussed with particular emphasis on QCD corrections at and beyond next-to-leading order as well as next…
Top Quark Polarization in Polarized Annihilation near Threshold
R. Harlander, M. Jezabek, J. H. Kuehn +1
Top quark polarization in annihilation into is calculated for linearly polarized beams. The Green function formalism is applied to this reaction near threshold.…
Handbook of LHC Higgs Cross Sections: 4. Deciphering the Nature of the Higgs Sector
D. de Florian, C. Grojean, F. Maltoni +373
This Report summarizes the results of the activities of the LHC Higgs Cross Section Working Group in the period 2014-2016. The main goal of the working group was to present the sta…
Handbook of LHC Higgs Cross Sections: 1. Inclusive Observables
LHC Higgs Cross Section Working Group, S. Dittmaier, C. Mariotti +62
This Report summarizes the results of the first 10 months' activities of the LHC Higgs Cross Sections Working Group. The main goal of the working group was to present the status-of…
Polarized Top Quarks
M. Jezabek, R. Harlander, J. H. Kuehn +1
Recent calculations are presented of top quark polarization in pair production close to threshold. S-P-wave interference gives contributions to all components of the top…
Precision Calculations for Associated WH and ZH Production at Hadron Colliders
O. Brein, M. Ciccolini, S. Dittmaier +3
Recently the next-to-next-to-leading order QCD corrections and the electroweak O(alpha) corrections to the Higgs-strahlung processes ppbar/pp -> WH/ZH + X have been calculated. Bot…
Second Order QCD Corrections to the Top Decay Rate
K. G. Chetyrkin, R. Harlander, T. Seidensticker +1
We report on a recent calculation of the top decay rate up to order α_s^2. It is based on asymptotic expansions of the off-shell top propagator, followed by a Padé approximation…
Two-loop matching coefficients for the strong coupling in the MSSM
R. Harlander, L. Mihaila, M. Steinhauser
When relating the strong coupling , measured at the scale of the boson mass, to its numerical value at some higher energy, for example the scale of Grand Unification, it…
Interim recommendations for the evaluation of Higgs production cross sections and branching ratios at the LHC in the Two-Higgs-Doublet Model
R. Harlander, M. Mühlleitner, J. Rathsman +2
In this note we give interim recommendations on how to evaluate LHC cross sections for (neutral) Higgs production and Higgs branching ratios in the general (CP-conserving) Two-Higg…
Complete Corrections of O(αα_s) to the Decay of the Z Boson into Bottom Quarks
R. Harlander, T. Seidensticker, M. Steinhauser
For the vertex corrections to the partial decay rate involving the top quark only the leading terms of order in the expansion are known. In th…
Singlet Polarization Functions at O(α_s^2)
K. G. Chetyrkin, R. Harlander, M. Steinhauser
We consider the three-loop singlet diagrams induced by axial-vector, scalar and pseudo-scalar currents. Expansions for small and large external momentum are presented. They are…
Higgs effects in top quark pair production
R. Harlander, M. Jezabek, J. H. Kuehn
Top quark production in and collisions is enhanced by the exchange of a Higgs boson. The enhancement factors are calculated in the threshold region using the Gre…
Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report
J. Bendavid, F. Caola, V. Ciulli +102
This Report summarizes the proceedings of the 2017 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt with (I) new developments relevant for high precision Standard…
Mass Corrections to the Vector Current Correlator
K. G. Chetyrkin, R. Harlander, J. H. Kuehn +1
Three-loop QCD corrections to the vector current correlator are considered. The large momentum procedure is applied in order to evaluate mass corrections up to order .…