THE GLUON DISTRIBUTION AND THE STRONG COUPLING CONSTANT α_s FROM INCLUSIVE DEEP INELASTIC SCATTERING DATA BY H1

摘要

A NLO QCD analysis of recent H1 proton structure function data is reported which accurately determines the gluon distribution in the range 3 · 10~(-4) ≤ x ≤ 0.1. In a combined fit of the H1 measurements and high precision μp data of the BCDMS collaboration the gluon distribution and the strong coupling constant α_s are simultaneously determined. A value of α_s(M_Z~2) - 0.1150 +- 0.0017(exp)_(-0.0005)~(+0.0009) (model) is obtained in NLO, with an additional theoretical uncertainty of about +- 0.005, mainly due to the uncertainty on the renormalisation scale.