Phys. Rev. Lett. 93, 112001 (2004) [4 pages]

Transverse Structure of Nucleon Parton Distributions from Lattice QCD

Abstract

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Ph. Hägler^1,*, J. W. Negele¹, D. B. Renner¹, W. Schroers¹, Th. Lippert², and K. Schilling² (LHPC and SESAM Collaborations)
¹Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
²Department of Physics, University of Wuppertal, D-42097 Wuppertal, Germany

Received 8 December 2003; published 9 September 2004

This work presents the first calculation in lattice QCD of three moments of spin-averaged and spin-polarized generalized parton distributions in the proton. It is shown that the slope of the associated generalized form factors decreases significantly as the moment increases, indicating that the transverse size of the light-cone quark distribution decreases as the momentum fraction of the struck parton increases.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.93.112001

DOI:

10.1103/PhysRevLett.93.112001

PACS:

12.38.Gc, 13.60.Fz

^*Current address: Department of Physics and Astronomy, Vrije Universiteit, 1081 HV Amsterdam, The Netherlands

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Phys. Rev. Lett. 93, 112001 (2004) [4 pages]

Transverse Structure of Nucleon Parton Distributions from Lattice QCD