Small-x Resummation and HERA Structure Function Data

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dc.creatorAltarelli, Guido
dc.creatorBall, Richard D.
dc.creatorForte, Stefano
dc.date2000-11-21
dc.date2001-03-14
dc.date.accessioned2026-07-07T10:52:12Z
dc.date.available2026-07-07T10:52:12Z
dc.descriptionWe apply our systematic NLO small x resummation of singlet splitting functions to the scaling violations of structure functions and compare the results with data. We develop various theoretical tools which are needed in order to relate resummed parton distributions to measurable structure functions, and we present results from a variety of fits to HERA data for the structure functions F_2 and F_L using the resummation. The behaviour of the singlet splitting functions at small x and fixed Q^2 is effectively parametrized as x^{-lambda}. We find that, for lambda small or negative, the resummed description of scaling violations may be phenomenologically as good as or even better than the standard next-to-leading order treatment. However, the best fit gluon density and value of alpha_s can be significantly modified by the resummation.
dc.description40 pages, 15 figures. Final version, to be published in Nucl. Phys. B. Typos corrected in eq. 4.5 and eq. 4.20 and in caption to fig.2
dc.identifierhttps://arxiv.org/abs/hep-ph/0011270
dc.identifierhttp://arxiv.org/abs/hep-ph/0011270
dc.identifierNucl.Phys.B599:383-423,2001
dc.identifierdoi:10.1016/S0550-3213(01)00023-2
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/185080
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSmall-x Resummation and HERA Structure Function Data
dc.typetext

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