scholarly journals THE LOOP CORRECTIONS TO THE PARITY-VIOLATING ELASTIC ELECTRON-PROTON SCATTERING

2009 ◽  
Vol 24 (18n19) ◽  
pp. 3645-3651
Author(s):  
YU CHUN CHEN ◽  
CHUNG WEN KAO
Keyword(s):  
Strange Quark ◽  
Parton Model ◽  
Elastic Electron ◽  
Proton Scattering ◽  
Weak Current ◽  
Parton Distributions ◽  
Generalized Parton Distributions ◽  
Boson Exchange ◽  
Neutral Weak Current ◽  
Hadronic Model

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.

scholarly journals Two-boson exchange corrections to parity-violating elastic electron-proton scattering

2010 ◽  
Vol 81 (3) ◽  
Author(s):  
Hai Qing Zhou ◽  
Chung Wen Kao ◽  
Shin Nan Yang ◽  
Keitaro Nagata
Keyword(s):  
Elastic Electron ◽  
Proton Scattering ◽  
Boson Exchange

PARTON DISTRIBUTION FUNCTIONS AND THE QCD-IMPROVED PARTON MODEL — AN OVERVIEW

1987 ◽  
Vol 02 (04) ◽  
pp. 1369-1387 ◽  
Author(s):  
Wu-Ki Tung
Keyword(s):  
Parton Distribution ◽  
Particle Production ◽  
Heavy Particle ◽  
Parton Model ◽  
Distribution Functions ◽  
Collider Physics ◽  
Parton Distribution Functions ◽  
Parton Distributions ◽  
First Order ◽  
Small X

Some non-trivial features of the QCD-improved parton model relevant to applications on heavy particle production and semi-hard (small-x) processes of interest to collider physics are reviewed. The underlying ideas are illustrated by a simple example. Limitations of the naive parton formula as well as first order corrections and subtractions to it are dis-cussed in a quantitative way. The behavior of parton distribution functions at small x and for heavy quarks are discussed. Recent work on possible impact of unconventional small-x behavior of the parton distributions on small-x physics at SSC and Tevatron are summarized. The Drell-Yan process is found to be particularly sensitive to the small x dependence of parton distributions. Measurements of this process at the Tevatron can provide powerful constraints on the expected rates of semi-hard processes at the SSC.

Measurements of elastic electron-proton scattering at large momentum transfer

1993 ◽  
Vol 48 (1) ◽  
pp. 29-55 ◽  
Author(s):  
A. F. Sill ◽  
R. G. Arnold ◽  
P. E. Bosted ◽  
C. C. Chang ◽  
J. Gomez ◽  
...  
Keyword(s):  
Momentum Transfer ◽  
Large Momentum Transfer ◽  
Large Momentum ◽  
Elastic Electron ◽  
Proton Scattering

QUARK ORBITAL ANGULAR MOMENTUM AND GENERALIZED PARTON DISTRIBUTIONS

2003 ◽  
Vol 18 (08) ◽  
pp. 1303-1309 ◽  
Author(s):  
XIANGDONG JI
Keyword(s):  
Angular Momentum ◽  
Quantum Chromodynamics ◽  
Orbital Angular Momentum ◽  
Parton Distributions ◽  
Generalized Parton Distributions ◽  
Quark Orbital Angular Momentum

In this talk, I review the merit of introducing and measuring the quark orbital angular momentum contribution to the spin of the nucleon in the context of quantum chromodynamics.

scholarly journals Moments of nucleon generalized parton distributions in lattice QCD

2003 ◽  
Vol 68 (3) ◽  
Author(s):  
Ph. Hägler ◽  
J. W. Negele ◽  
D. B. Renner ◽  
W. Schroers ◽  
Th. Lippert ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Parton Distributions ◽  
Generalized Parton Distributions
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