56 citations · 184 across the 9 of their papers we have counts for
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Higher Fock states and power counting in exclusive charmonium decays
Peter Kroll
The role of higher Fock-state contributions to exclusive charmonium decays will be discussed. It will be argued that the J/Psi (Psi') decays into baryon-antibaryon pairs are domina…
Comment on the paper: ``The perturbative proton form factor reexamined'' by Kundu et al
J. Bolz, R. Jakob, P. Kroll +1
We point out some serious problems in the investigation of Kundu et al. which claims agreement with the existing data of the proton form factor, calculated without taking into acco…
Higher Fock states and power counting in exclusive P-wave quarkonium decays
Jan Bolz, Peter Kroll, Gerhard A. Schuler
Exclusive processes at large momentum transfer Q factor into perturbatively calculable short-distance parts and long-distance hadronic wave functions. Usually, only contributions f…
Exclusive J/Psi and Psi'decays into baryon-antibaryon pairs
Jan Bolz, Peter Kroll
Within a perturbative approach we investigate decays of charmonium states into baryon-antibaryon pairs. Using a recently proposed wave function for the nucleon and suitable general…
Colour-octet contributions to exclusive charmonium decays
J. Bolz, P. Kroll, G. A. Schuler
We investigate the theoretical uncertainties of -wave charmonium decays into two pions, , . Constraining the pion distribution-amplitude from…
Modelling the nucleon wave function from soft and hard processes
J. Bolz, P. Kroll
Current light-cone wave functions for the nucleon are unsatisfactory since they are in conflict with the data of the nucleon's Dirac form factor at large momentum transfer. Therefo…
Intrinsic Transverse Size Effect
J. Bolz, R. Jakob, P. Kroll +2
Two recently proposed concepts to improve the perturbative calculation of exclusive amplitudes, gluonic radiative corrections (Sudakov factor) and confinement size effects (intrins…
A Critical Analysis of the Proton Form Factor with Sudakov Suppression and Intrinsic Transverse Momentum
J. Bolz, R. Jakob, P. Kroll +2
The behavior of the proton magnetic form factor is studied within the modified hard scattering picture, which takes into account gluonic radiative corrections in terms of transvers…
l=0 to l=1 Transition Form Factors
J. Bolz, P. Kroll, J. G. Koerner
A method is proposed to extend the hard scattering picture of Brodsky and Lepage to transitions between hadrons with orbital angular momentum l=0 and l=1. The use of covariant spin…