1994/09/08 by P. Kroll, Kroll, P.
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.hep-ph/9409262
openalex publication_date 1994/09/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Recent improvements of the hard scattering picture for the large p⊥ behaviour of electromagnetic form factors, namely the inclusion of both Sudakov corrections and intrinsic transverse momentum dependence of the hadronic wave function, are reviewed. On account of these improvements the perturbative contributions to the pion's and the nucleon's form factor can be calculated in a theoretically self-consistent way for momentum transfers as low as about 2 and 3 \rm GeV, respectively. This is achieved at the expense of a substantial suppression of the perturbative contribution in the few GeV region. Eventual higher twist contributions are discussed in some detail.