# XX International Workshop on Deep-Inelastic Scattering and Related Subjects

26-30 March 2012
University of Bonn
Europe/Berlin timezone

## Azimuthal distributions of charged hadrons, pions, and kaons produced in deep-inelastic scattering off unpolarized protons and deuterons

27 Mar 2012, 12:00
25m
Lecture Hall, Institute for Physical Chemistry (University of Bonn)

Spin physics

### Speaker

Francesca Giordano (U)

### Description

The azimuthal $\cos\phi$ and $\cos2\phi$ modulations of the distribution of hadrons produced in unpolarized semi-inclusive deep-inelastic scattering of electrons and positrons off hydrogen and deuterium targets have been measuread at the HERMES experiment. For the first time these modulations were determined in a four-dimensional kinematic space for positively and negatively charged pions and kaons separately, as well as for unidentified hadrons. These azimuthal dependences are sensitive to the transverse motion and polarization of the quarks within the nucleon via, e.g., the Cahn, Boer-Mulders and Collins effects.

### Co-author

Dr Rebecca Truty (UIUC)

### Presentation materials

 Proceedings Slides