Bochum 2009 – wissenschaftliches Programm

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HK: Fachverband Hadronen und Kerne

HK 67: Poster Session

HK 67.12: Poster

Donnerstag, 19. März 2009, 14:00–16:00, Audi-Max

Non-Singlet spin structure function in valon model — •fatemeh taghavi shahri¹ and firooz arash² — ¹School of Particles and Accelerators,IPM(Institute for Studies in Theoretical Physics and Mathematics), P.O.Box 19395-5531, Tehran, Iran — ²department of physics,tafresh University,Tafresh

We present a Next-to-leading order QCD calculation of non-singlet spin structure function g₁^NS(x,Q²), of the nucleon in the so-called the valon representation. The structure of the valon itself develops through the perturbative dressing of a valence quark in QCD, which is independent of the hosting hadron. The results of this calculations are in excellent agreement with the experimental data from HERMES collaborations for the entire measured range of x. It also provides an acceptable agreement with the older data from SMC, E143 and E155 experiments. We have further compared our results with those from AA, BB, GRSV, and DNS global fits.