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61 papers · 2 filters
Supersymmetric contributions to electroweak precision observables: QCD corrections
A. Djouadi, P. Gambino, S. Heinemeyer +3
We calculate the two-loop QCD correction to the scalar quark contributions to the electroweak gauge-boson self-energies at zero momentum-transfer in the supersymmetric extension of…
Probing nonstandard bosonic interactions via W-boson pair production at lepton colliders
K. Hagiwara, T. Hatsukano, S. Ishihara +1
The process e+e- --> W+W- provides a valuable laboratory to test the Standard Model (SM) and to search for new physics. The most general helicity amplitudes for this process requir…
Bottom-up approach and supersymmetry breaking
M. Carena, P. H. Chankowski, M. Olechowski +2
We present a bottom-up approach to the question of supersymmetry breaking in the MSSM. Starting with the experimentally measurable low-energy supersymmetry breaking parameters, whi…
Weak Radiative B-Meson Decay Beyond Leading Logarithms
Konstantin Chetyrkin, Mikolaj Misiak, Manfred Munz
We present our results for three-loop anomalous dimensions necessary in analyzing decay at the next-to-leading order in QCD. We combine them with other recently calcul…
Cherenkov radiation by massless neutrinos in a magnetic field
Ara N. Ioannisian, Georg G. Raffelt
We calculate the Cherenkov process nu -> nu+photon in the presence of a homogeneous magnetic field. The neutrinos are taken to be massless with only standard-model couplings. The m…
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…