145 citations · 3k across the 88 of their papers we have counts for
9 papers · 2 filters
On the running electromagnetic coupling constant at
J. G. Koerner, A. A. Pivovarov, K. Schilcher
We present a discussion on how to define the running electromagnetic coupling constant at or some other intermediate scale as e.g. . We argue that a natural definition c…
Polarized top decay into polarized W: t(up)->W(up) + b at O(alpha_s)
M. Fischer, S. Groote, J. G. Körner +2
We consider the decay of a polarized top quark into a polarized W-boson plus a bottom quark, followed by the decay of the W-boson into a pair of leptons or quarks. The polar angle…
Spin-Momentum Correlations in Inclusive Semileptonic Decays of Polarized Baryons
Jürgen G. Körner, Dan Pirjol
We consider spin-momentum correlations between the spin of the bottom baryon and the momenta of its decay products in its inclusive semileptonic decay. We define s…
One-Pion Charm Baryon Transitions in a Relativistic Three-Quark Model
M. A. Ivanov, J. G. Korner, V. E. Lyubovitskij +1
We study one-pion transitions between charm baryon states in the framework of a relativistic three-quark model. We calculate the charm baryon-pion coupling factors that govern the…
Gluon Polarization in e^+e^- -> t \bar t G: Polar Angle Dependence and Beam Polarization Effects
S. Groote, J. G. Körner, J. A. Leyva
We calculate the linear and circular polarization of gluons produced in conjunction with massive quarks in the annihilation process . The linear polarization…
On the evaluation of sunset-type Feynman diagrams
S. Groote, J. G. Körner, A. A. Pivovarov
We introduce an efficient configuration space technique which allows one to compute a class of Feynman diagrams which generalize the scalar sunset topology to any number of massive…
Charmed Baryon Strong Coupling Constants in a Light-Front Quark Model
Salam Tawfiq, Patrick J. O'Donnel, J. G. Koerner
Light-Front quark model spin wave functions are employed to calculate the three independent couplings g_{Σ_c Λ_c π}, f_{Λ_{c1} Σ_c π} and f_{Λ^{*}_{c1} Σ_c π} of S-wave to S-wave a…
QCD Sum Rule Determination of with Minimal Data Input
S. Groote, J. G. Körner, K. Schilcher +1
We present the results of a new evaluation of the running fine structure constant at the scale of the mass in which the role of the annihilation input data needed…
On the rigidity of back-to-back top quark pairs in e^+e^- annihilation
S. Groote, J. G. Körner, J. A. Leyva
We consider the effect of gluon radiation on the energy of top/antitop quarks and on the anticollinearity of top-antitop quark pairs produced in annihilation. Our results…