Quark-hadron duality in structure functionsAlessandra Fantoni1, Nicola Bianchi1 and Simonetta Liuti2
1 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)
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