The role of gauge invariance in single-spin asymmetries. The Sivers single-spin asymmetry in photon-jet production. DESY-07-028 (2007), hep-ph/0703153. Single-transverse spin asymmetry in dijet correlations at hadron colliders. Gluonic pole cross-sections and single spin asymmetries in hadron-hadron scattering. JHEP 02, 029 (2007), hep-ph/0609206. The construction of gauge-links in arbitrary ha...

Hadron production is a key ingredient in many aspects of neutrino physics. Precise prediction of atmospheric neutrino fluxes, characterization of accelerator neutrino beams, quantification of pion production and capture for neutrino factory designs, all of these would profit of highstatistics, high-precision hadron production measurements. In addition, such data is needed for the calibration of...

The CERN COMPASS experiment will investigate hadron-photon interactions, to achieve a unique Primakoff Coulomb physics program based on hadron polarizability, hybrid mesons, chiral anomaly, and meson radiative transition studies. In COMPASS, pion (kaon) polarizabilities and radiative transitions will be measured via dedicated Primakoff effect reactions such as πγ → π ′ γ and πγ → M (meson). We ...

We apply the Color Glass Condensate formalism to photon + hadron production cross section in high energy deuteron (proton)-gold collisions at RHIC. We investigate the dependence of the production cross section on the angle between the produced hadron and photon for various rapidities and transverse momenta. It is shown that the angular correlation between the produced hadron and photon is a sen...

Modifications of hadron masses and some of their basic properties with temperature or nuclear density are considered as one possible signatures for the formation of dense hadronic matter in nuclear collisions. We discuss here some basic results on the temperature dependence of hadron properties obtained from calculations of hadron correlation functions, the chiral condensate as well as the equa...