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Threshold expansion at order alpha_s^4 for the t-tbar invariant mass distribution at hadron colliders
Valentin Ahrens, Andrea Ferroglia, Matthias Neubert +2
We calculate the leading O(alpha_s^4) contributions to the invariant mass distribution of top-quark pairs produced at the Tevatron and LHC, in the limit where the invariant mass of…
Flavor Physics in the Randall-Sundrum Model: II. Tree-Level Weak-Interaction Processes
M. Bauer, S. Casagrande, U. Haisch +1
A comprehensive analysis of tree-level weak interaction processes at low energy is presented for the Randall-Sundrum (RS) model with SU(2)_L * U(1)_Y bulk gauge symmetry and brane-…
Two-loop divergences of massive scattering amplitudes in non-abelian gauge theories
Andrea Ferroglia, Matthias Neubert, Ben D. Pecjak +1
The infrared divergences of QCD scattering amplitudes can be derived from an anomalous dimension Γ, which is a matrix in color space and depends on the momenta and masses of the ex…
Two-loop divergences of scattering amplitudes with massive partons
Andrea Ferroglia, Matthias Neubert, Ben D. Pecjak +1
We complete the study of two-loop infrared singularities of scattering amplitudes with an arbitrary number of massive and massless partons in non-abelian gauge theories. To this en…
Flavor Physics in the Quark Sector
M. Antonelli, D. M. Asner, D. Bauer +137
One of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor and measurements and theoretical interpretations of their res…
Infrared singularities of QCD amplitudes with massive partons
Thomas Becher, Matthias Neubert
A formula for the two-loop infrared singularities of dimensionally regularized QCD scattering amplitudes with an arbitrary number of massive and massless legs is derived. The singu…