Analysis of data on polarized lepton-nucleon scattering

Analysis of Data on Polarized Lepton-Nucleon Scattering

We re-analyze data on deep inelastic polarized lepton-nucleon scattering, with particular attention to testing the Bjorken sum rule and estimating the quark contributions to the nucleon spin. Since only structure function data at fixed Q can be used to test sum rules, we use E142 asymmetry measurements and unpolarized structure function data to extract g 1 at fixed Q 2 = 2 GeV. When higher-twis...

Polarized lepton - nucleon scattering in frame of various guage model

Stable Algorithm for Extraction of Asymmetries from the Data on Polarized Lepton-Nucleon Scattering

A new algorithm for extraction of asymmetries from polarized leptonnucleon scattering data is proposed. The algorithm is stable to set-up acceptance and/or luminosity monitor acceptance variations. A statistical test for checking the data quality is proposed. PACS: 13.88.+e, 13.60.Hb; MSC: 62-07; key words: method, polarization, nucleon, asymmetry, spin Dr.N.Gagunashvili, Laboratory of Particle...

Resonances and higher twist in polarized lepton-nucleon scattering∗

We present a detailed analysis of resonance contributions in the context of higher twist effects in the moments of the proton spin structure function g1. For each of these moments, it is found that there exists a characteristic Q2 region in which (perturbative) higher twist corrections coexist with (non-perturbative) resonance contribution of comparable magnitude. PACS: 12.38.Cy, 13.60.Hb, 13.8...

Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering.

A next-to-leading order QCD analysis of spin asymmetries and structure functions in polarized deep inelastic lepton nucleon scattering is presented within the framework of the radiative parton model. A consistent NLO formulation of theQ-evolution of polarized parton distributions yields two sets of plausible NLO spin dependent parton distributions in the conventional MS factorization scheme. Th...