Flavor-dependent azimuthal modulations in unpolarized SIDIS cross section at HERMES

Abstract

The $\cos {\varphi }_h$ and $\cos 2{\varphi }_h$ azimuthal modulations of the unpolarized hadron Semi-Inclusive Deep Inelastic Scattering cross section are sensitive to the quark intrinsic transverse momentum and transverse spin. These modulations have been measured at HERMES in a fully differential way by means of a 4-dimensional unfolding procedure to correct for instrumental effects. Results have been extracted for hydrogen and deuterium targets and separately for positively and negatively charged pions and kaons, to access flavor-dependent information about the nucleon internal transverse degrees of freedom.

References in corpus (2)

• Transverse Quark Spin Effects and the Flavor Dependence of the Boer-Mulders Function
• A systematic phenomenological study of the $\cos 2\varphi$ asymmetry in unpolarized semi--inclusive DIS