On mesonic interference phenomena in deep inelastic scattering View Full Text


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Article Info

DATE

1997-06

AUTHORS

M. Kh. Khankhasayev, A. Szczurek, J. Speth

ABSTRACT

Possible effects of a π′ contribution to lepton deep-inelastic scattering (DIS) are analyzed. The exchange of the first radial excitation of the pion (π′(0−)) has been advocated recently to solve the notorious problem of hard vertex form factors innucleon-nucleon scattering. The π′-meson exchange contribution is calculated in addition to the well known pionic (Sullivan) contribution. Interference between π and π′ contributions and their possible influence on the cut-off mass parameter of the πNN form factor extracted from DIS on the nucleon are examined. It is shown that the orthogonality relation between the π and π′ wave functions, in conjunction with number and momentum sum rules, put strong restrictions on the size of the interference effect. The interference effect between π and π′ is found to be negligible for the nucleon quark distributions and to modify only higher moments of the quark distributions. The interference effects of a pionic contribution with other mesons are discussed. More... »

PAGES

191-200

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s002180050386

DOI

http://dx.doi.org/10.1007/s002180050386

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1048410989


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