Publications (6)0 Total impact
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ABSTRACT: Single-jet production with missing transverse momentum is one of the most
promising discovery channels for new physics at the LHC. In the Standard Model,
Z + jet production with a Z-boson decay into neutrinos leads to this monojet
signature. To improve the corresponding Standard Model predictions, we present
the calculation of the full next-to-leading-order (NLO) electroweak corrections
and a recalculation of the NLO QCD corrections to monojet production at the
Tevatron and the LHC. We discuss the phenomenological impact on the total cross
sections as well as on relevant differential distributions.
11/2012;
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ABSTRACT: The first calculation of the next-to-leading-order electroweak corrections to
Z-boson + jet hadroproduction including leptonic Z-boson decays is presented,
i.e. to the production of a charged lepton--anti-lepton final state in
association with one hard jet at the LHC and the Tevatron. The Z-boson
resonance is treated consistently using the complex-mass scheme, and all
off-shell effects as well as the contributions of the intermediate photon are
taken into account. The corresponding next-to-leading-order QCD corrections
have also been recalculated. The full calculation is implemented in a flexible
Monte Carlo code. Numerical results for cross sections and distributions of
this Standard Model benchmark process are presented for the Tevatron and the
LHC.
03/2011;
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ABSTRACT: In this talk we discuss the next-to-leading-order electroweak (EW) corrections to W-boson + jet hadroproduction [1] and compare the full result to a simple approximation assuming factorization of EW and QCD corrections for the charged-current Drell-Yan process. The W-boson resonance is treated consistently using the complex-mass scheme, and all off-shell effects are taken into account. The corresponding next-to-leading-order QCD corrections have also been recalculated. All the results are implemented in a flexible Monte Carlo code. Selected numerical results for this Standard Model benchmark process are presented for the LHC. The comparison of our result to an approximation based on the EW corrections to W-boson production without additional jets is a step towards a better understanding of the interplay between QCD and EW effects for W-boson production in general. Comment: 6+1 pages, contribution to the proceedings of the 9th International Symposium on Radiative Corrections (RADCOR 2009), October 25-30 2009, Ascona, Switzerland
01/2010;
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ABSTRACT: This talk summarizes the first calculation of the next-to-leading-order electroweak corrections to W-boson + jet hadroproduction including leptonic W-boson decays [1]. The W-boson resonance is treated consistently using the complex-mass scheme, and all off-shell effects are taken into account. The corresponding next-to-leading-order QCD corrections have also been recalculated. All the results are implemented in a flexible Monte Carlo code. Selected numerical results for this Standard Model benchmark process are presented for the LHC. Comment: 4+1 pages, contribution to the proceedings of the 2009 Europhysics Conference on High Energy Physics (EPS-HEP 2009), 16-22 July 2009, Krakow, Poland
09/2009;
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ABSTRACT: The high accuracy envisaged for future measurements of W-boson production at hadron colliders has to be matched by precise theoretical predictions. We study the impact of electroweak radiative corrections on W-boson production cross sections and differential distributions at the Tevatron and at the LHC. In particular, we include photon-induced processes, which contribute at O(alpha), and leading radiative corrections beyond O(alpha) in the high-energy Sudakov regime and from multi-photon final-state radiation. We furthermore present the calculation of the complete supersymmetric next-to-leading-order electroweak and QCD corrections to W-boson hadroproduction within the MSSM. The supersymmetric corrections turn out to be negligible in the vicinity of the W resonance in general, reaching the percent level only at high lepton transverse momentum and for specific choices of the supersymmetric parameters.
11/2007;
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ABSTRACT: Higgs-boson production in association with bottom quarks is an important discovery channel for supersymmetric Higgs particles at hadron colliders for large values of tan(beta). We present the complete O(alpha) electroweak and O(alpha_s) strong corrections to associated bottom-Higgs production through bb fusion in the MSSM and improve this next-to-leading-order prediction by known two-loop contributions to the Higgs self-energies, as provided by the program FeynHiggs. Choosing proper renormalization and input-parameter schemes, the bulk of the corrections (in particular the leading terms for tan(beta)) can be absorbed into an improved Born approximation. The remaining non-universal corrections are typically of the order of a few per cent. Numerical results are discussed for the benchmark scenarios SPS 1b and SPS 4. Comment: 24 pages, 5 figures, LaTex, 1 figure added, reference added, version published in JHEP
11/2006;
