Azimuthal Asymmetries in Inclusive Single Pion Electroproduction

Chiral-odd Fragmentation Functions in Single Pion Inclusive Electroproduction

We consider a sub-leading twist chiral-odd pion fragmentation function and explore its contribution in single pion semi-inclusive electroproduction. We evaluate the single beam-spin azimuthal asymmetry ALU and the double spin asymmetry ALT in polarized electroproduction of pions from an unpolarized and transversely polarized nucleon respectively. The beam asymmetry is expressed as the product o...

Hermes and the Spin of the Proton

HERMES is a second generation experiment to study the spin structure of the nucleon, in which measurements of the spin dependent properties of semi-inclusive deep-inelastic lepton scattering are emphasized. Data have been accumulated for semi-inclusive pion, kaon, and proton double-spin asymmetries, as well as for high-pT hadron pairs, and singlespin azimuthal asymmetries for pion electroproduc...

Azimuthal single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarised hydrogen target

Azimuthal single-spin asymmetries (SSA) in semi-inclusive electroproduction of charged pions and kaons in deep-inelastic scattering of positrons on a transversely polarised hydrogen target were observed. SSA amplitudes for both the Collins and the Sivers mechanism are presented.

Single target - spin asymmetries in semi - inclusive pion electroproduction on longitudinally polarized protons ∗

Transverse Momentum Dependence of Semi - Inclusive Pion and Kaon Production July 5 , 2011

1 Executive Summary E12-09-017 plans to make precise measurements of cross sections of semi-inclusive charged-pion (π ±) electroproduction at deep inelastic scattering kinematics and low transverse momentum (P h⊥) from hydrogen and deuterium targets. The experiment will simultaneously, albeit with a factor of ten lower rates, accumulate charged-kaon (K ±) cross secion measurements, and obtain h...