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

TL;DR

This paper reports measurements of unidentified charged hadron production from muon-deuteron scattering at COMPASS, providing data to test pQCD predictions at low Q^2 and high transverse momentum, aiding understanding of photon-parton interactions.

Contribution

It presents the first detailed measurement of charged hadron cross-sections at COMPASS at 5 GeV, comparing results with NLO pQCD calculations to evaluate their applicability.

Findings

Measured cross-sections are consistent with NLO pQCD within uncertainties.

Results help validate pQCD models at low Q^2 and high p_T.

Data enhances understanding of photon-gluon and quark-gluon processes.

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.)