Possible evidence of extended objects inside the proton

Abstract

Recent data on the Nachtmann moments of the unpolarized proton structure function F2p, obtained at low momentum transfer with the CLAS detector at Jefferson Lab, are interpreted in terms of the dominance of the elastic coupling of the virtual photon with extended substructures inside the proton. The CLAS data exhibit a new type of scaling behavior and the resulting scaling function can be interpreted as a constituent form factor consistent with the elastic nucleon data. A constituent size of ~ 0.2 - 0.3 fm is obtained.

o appear in Nucl. Phys. A as Proc. of the XVII Int'l IUPAP Conf. on Few-Body Problems in Physics, Durham (North Carolina, USA), June 5-10, 2003

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• Polarized Structure of Nucleon in the Valon Representation
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• The Pauli Form Factor of Quark and Nontrivial Topological Structure of the QCD
• Integrating Holographic Vector Dominance to Hidden Local Symmetry for the Nucleon Form Factor
• Soft gluon resummation in the quark-vector boson vertex at high energy: On-mass-shell case