Eur. Phys. J. A 24, s1.35-s1.39 (2005)
DOI: 10.1140/epjad/s2005-05-006-x

Quark-hadron duality in structure functions

Alessandra Fantoni¹, Nicola Bianchi¹ and Simonetta Liuti<sup>2

1</sup>  Laboratori Nazionali di Frascati dell'INFN, Via E. Fermi 40, 00044 Frascati (RM), Italy
²  University of Virginia, Charlottesville, Virginia 22901, USA

(Received 26 September 2004 / Published online 08 February 2005)

Abstract

The quark-hadron duality is studied in a systematic way for polarized and unpolarized structure functions, by taking into account all the available data in the resonance region. In both cases, a precise perturbative QCD based analysis to the integrals of the structure functions in the resonance region has been done: non perturbative contributions have been disentangled and the higher twist contributions have been evaluated. A different behavior for the unpolarized and polarized structure functions at low Q² has been found.

PACS: quark-hadron duality - structure functions

© Società Italiana di Fisica, Springer-Verlag 2005