Hadron production from $\mu-Deuteron$ scattering at $\sqrt{s}=17 GeV$ at COMPASS

Abstract

Hadrons proceeding from quasi-real photo-production are one of the many probes accesible at the Common Muon Proton Apparatus for Structure and Spectroscopy (COMPASS) at CERN. These hadrons provide information on the scattering between photon and partons through \gamma-gluon(g) direct channels as well as q-g resolved processes. Comparisons of unpolarized differential cross section measurements to next-to-leading order (NLO) pQCD calculations are essential to develop our understanding of proton-proton and lepton-nucleon scattering at varying center of mass energies. These measurements are important to asses the applicability of NLO pQCD in interpreting polarized processes. In this talk we will present the unidentified charged separated hadron cross-sections measured by the COMPASS experiment at center of mass energy of \sqrt{s}=17GeV, low Q^{2} (Q^{2}<0.1GeV^{2}/c^{2}) and high transverse momenta (p_{T}>1.0 GeV/c.)