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Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 16: Hadronenstruktur und -spektroskopie III

HK 16.5: Vortrag

Dienstag, 16. März 2010, 15:30–15:45, HG III

Spin structure of the nucleon: model calculations and QCD evolution of lattice results — •Michael Altenbuchinger, Philipp Hägler, and Wolfram Weise — Physik-Department, TU München

The question of how the spin of the nucleon is distributed among its quark and gluon constituents is still a subject of intense investigations. Recent work by Thomas and Myhrer addressed this question in terms of a relativistic, chirally symmetric model. In the comparison of such model calculations with experiment or lattice QCD, the treatment of scale evolution and the fixing of the model scale are essential. In this talk we present a study based on a refined model and next-to-leading order QCD evolution of lattice results from the LHP collaboration. We compare this approach with the Thomas-Myhrer scenario for resolving the proton spin puzzle.

Work supported in part by BMBF, the DFG Emmy-Noether-Program and the Cluster of Excellence "Origin and Structure of the Universe".

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