Scaling of space and timelike response of confined relativistic particles

Details Scaling of space and timelike response of confined relativistic particles Scaling of space and timelike response of confined relativistic particles

2001-05-30

arxiv.org/abs/nucl-th/0105076v1

Phys.Lett. B514 (2001) 361-365

Physics

Nuclear Physics

Nuclear Theory

10 pages, 5 figures; submitted to Physics Letters B

Scientific paper

10.1016/S0370-2693(01)00794-8

The response of a relativistic particle bound in a linear confining well is calculated as a function of the momentum and energy transfer, q, \nu. At large values of |q| the response exhibits scaling in the variable y=\nu-|q|, which is proportional to the Nachtmann variable, \xi. The approach to scaling is studied at smaller values of |q|. Scaling occurs at \nu~|q| at relatively small |q|, and its validity extends over the entire \xi range as |q| increases; this behavior is observed in electron-proton scattering. About 10% of the response at large |q| is in the timelike region where \nu>|q|, and it is necessary to include it to fulfill the particle number sum rule. The Gross-Llewellyn Smith and Gottfried sum rules are discussed in the context of these results.

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