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44 papers · 2 filters
alpha_s from tau decays revisited
D. Boito, O. Cata, M. Golterman +4
Being a determination at low energies, the analysis of hadronic tau decay data provides a rather precise determination of the strong coupling alpha_s after evolving the result to M…
EW corrections to Higgs strahlung at the Tevatron and the LHC with HAWK
Ansgar Denner, Stefan Dittmaier, Stefan Kallweit +1
We briefly report on the inclusion of NLO QCD and electroweak corrections to the Higgs-strahlung processes pp/ppbar -> HW/Z -> H+2leptons in the Monte Carlo program HAWK. The elect…
Foundation and generalization of the expansion by regions
Bernd Jantzen
The "expansion by regions" is a method of asymptotic expansion developed by Beneke and Smirnov in 1997. It expands the integrand according to the scaling prescriptions of a set of…
Electroweak corrections to Higgs-strahlung off W/Z bosons at the Tevatron and the LHC with HAWK
A. Denner, S. Dittmaier, S. Kallweit +1
The associate production of Higgs bosons with W or Z bosons, known as Higgs-strahlung, is an important search channel for Higgs bosons at the hadron colliders Tevatron and LHC for…
NNLL resummation for squark-antisquark production
Wim Beenakker, Silja Brensing, Michael Krämer +3
We report on the resummation of soft-gluon emissions for squark-antisquark production at next-to-next-to-leading-logarithmic (NNLL) accuracy. We will put particular emphasis on the…
Effective Theory of Resonant Leptogenesis in the Closed-Time-Path Approach
Bjorn Garbrecht, Matti Herranen
We describe mixing scalar particles and Majorana fermions using Closed-Time-Path methods. From the Kadanoff-Baym equations, we obtain the charge asymmetry, that is generated from d…