The diffractive contribution to deep inelastic lepton-proton scattering: Implications for QCD momentum sum rules and parton distributions

We calculate the two-boson-exchange (TBE) corrections to the parity-violating asymmetry of the elastic electron-proton scattering in a parton model using the formalism of generalized parton distributions (GPD's). We find that these effects can reach a few percent and are comparable in size with the current experimental measurements of strange-quark effects in the proton neutral weak current. Our result is also compared with the result of the hadronic model.

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ALGORITHM DEPENDENCE OF PARTON SHOWERS IN DEEP INELASTIC SCATTERING

International Journal of Modern Physics A ◽

10.1142/s0217751x9100054x ◽

1991 ◽

Vol 06 (06) ◽

pp. 989-1002 ◽

Cited By ~ 4

Author(s):

TOMO MUNEHISA ◽

HIDEKAZU TANAKA

Keyword(s):

Inelastic Scattering ◽

Deep Inelastic Scattering ◽

Inelastic Electron ◽

Proton Scattering ◽

Parton Distributions ◽

Deep Inelastic Electron ◽

Evolution Algorithms

Parton showers for deep inelastic electron-proton scattering are studied. Forward and backward evolution algorithms are constructed using the same definitions for splitting and evolution variables. We discuss features of two algorithms and examine algorithm dependence of final parton distributions.

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SINGULARITIES OF GENERALIZED PARTON DISTRIBUTIONS

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194512009300 ◽

2012 ◽

Vol 20 ◽

pp. 251-265 ◽

Cited By ~ 6

Author(s):

ANATOLY V. RADYUSHKIN

Keyword(s):

Sum Rules ◽

Careful Analysis ◽

Renormalization Procedure ◽

Parton Distributions ◽

Singularity Structure ◽

Regge Behavior ◽

Generalized Parton Distributions ◽

Building Models ◽

Analytic Regularization ◽

Recent Developments

We discuss recent developments in building models for GPDs that are based on the formalism of double distributions (DDs). A special attention is given to a careful analysis of the singularity structure of DDs. The DD formalism is applied to construction of a model GPDs with a singular Regge behavior. Within the developed DD-based approach, we discuss the structure of GPD sum rules. It is shown that separation of DDs into the so-called "plus" part and the D-term part may be treated as a renormalization procedure for the GPD sum rules. This approach is compared with an alternative prescription based on analytic regularization.

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