Soft gluon effects in the extraction of higher twists at large Bjorken x

Abstract

Existing data on the (unpolarised) transverse structure function of the proton are analyzed for large values of the Bjorken variable x. The leading-twist and a phenomenological higher-twist contributions are simultaneously determined from a power correction analysis of the Nachtmann moments for values of the squared four-momentum transfer between ~ 1 and 20 (GeV/c)**2. The results obtained adopting the next-to-leading order approximation and those including the effects of soft gluon resummation are compared. The sensitivity of the extraction of large-x higher twists to high-order radiative corrections as well as to the value of alphas(MZ) is illustrated.

arXiv commentrevised version to appear in Phys. Lett. B: discussion of higher-twist models included; misprints in Eq. (1) and (10) corrected

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• The interplay between Sudakov resummation, renormalons and higher twist in deep inelastic scattering
• Dilepton production near partonic threshold in transversely polarized proton-antiproton collisions
• Global Analysis of Data on the Proton Structure Function g1 and Extraction of its Moments
• Review of AdS/CFT Integrability, Chapter IV.4: Integrability in QCD and N<4 SYM
• Measurement of the Deuteron Structure Function F2 in the Resonance Region and Evaluation of Its Moments
• Power corrections in deep inelastic structure functions at large Bjorken x
• Impact of Higher Order and Soft Gluon Corrections on the Extraction of Higher Twist Effects in DIS
• Leading twist moments of the neutron structure function F2n
• New extraction of alpha_s(MZ) from proton DIS data
• Measurement of the Nucleon Structure Function F2 in the Nuclear Medium and Evaluation of its Moments
• Higher Twist in Electroproduction: Flavor Non-Singlet QCD Evolution
• Experimental moments of the nucleon structure function F2
• Leading and higher twists in proton, neutron and deuteron unpolarized structure functions