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Type: Conference paper
Title: Progress in the calculation of nucleon form factors and parton distribution functions
Author: Thomas, A.
Ashley, J.
Detmold, W.
Leinweber, D.
Melnitchouk, W.
Young, R.
Citation: Nuclear Physics A, 2003 / vol.721, pp.915C-921C
Publisher: Elsevier Science BV
Issue Date: 2003
ISSN: 0375-9474
Conference Name: OSAKA, JAPAN)
Statement of
A. W. Thomas, J. D. Ashley, W. Detmold, D. B. Leinweber, W. Melnitchouk and R. D. Young
Abstract: Even though current lattice calculations are limited to unrealistically large quark masses, it is possible to implement the model independent constraints of chiral symmetry in extrapolations to the physical region. We discuss the role of the Δ-isobar in the extrapolation of the moments of spin dependent parton distribution functions. Unlike the unpolarised case, the Δ plays a crucial role for the isovector spin dependent distributions. We also present initial results for the extrapolation of isovector nucleon form factors, finding reasonably good agreement with experimental data.
Description: Copyright © 2003 Published by Elsevier Science B.V.
RMID: 0020030102
DOI: 10.1016/S0375-9474(03)01242-9
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Appears in Collections:Physics publications

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