ANin inclusive lepton-proton collisions: TMD and twist-3 approaches

Higher Twist Effects In Proton-Proton Collisions

In this article, we investigate the contribution of the high twist Feynman diagrams to the large-pT pion production cross section in proton-proton collisions and we present the general formulae for the high and leading twist differential cross sections. The pion wave function where two non-trivial Gegenbauer coefficients a2 and a4 have been extracted from the CLEO data, two other pion model wav...

Next-to-leading order QCD corrections to inclusive-hadron photoproduction in polarized lepton-proton collisions

We calculate the next-to-leading order QCD corrections to the “direct” part of the spin-dependent cross section for single-inclusive charged-hadron photoproduction. This process could be studied experimentally in future polarized fixed-target lepton-nucleon experiments, but also at the HERA ep collider after an upgrade to both beams being polarized. We present a brief numerical evaluation of ou...

Comparison of inclusive K production in proton-proton and proton-neutron collisions

Yu. Valdau, 2, ∗ V. Koptev, S. Barsov, M. Büscher, A. Dzyuba, M. Hartmann, A. Kacharava, I. Keshelashvili, A. Khoukaz, S. Mikirtychiants, 2 M. Nekipelov, A. Polyanskiy, F. Rathmann, H. Ströher, Yu. N. Uzikov, and C. Wilkin † High Energy Physics Department, Petersburg Nuclear Physics Institute, RU-188350 Gatchina, Russia Institut für Kernphysik and Jülich Centre for Hadron Physics, Forschungszen...

Inclusive Lepton-hadron Experiments

Studying Lepton Family Violation in Lepton-lepton Collisions

In the context of the future high energy – high luminosity electron and muon colliders, all the relevant four-lepton processes with the lepton family violation (LFV) are systematically classified. The most general LFV effective lagrangians are found, and the helicity differential cross sections for the LFV processes are calculated. The sixand eightlepton Standard Model (SM) backgrounds are disc...