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Gauge-Invariant Scaling Model of Current Interactions with Regge Behavior and Finite Fixed-Pole Sum Rules

Journal Article · · Physical Review. D, Particles Fields
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BS>A general nonperturbative model for the entire Compton amplitude which incoporates Bjorken scaling, gauge invariance, and Regge behavior is presented. We show that a covariantly regularized model based on the infinite- momentum-frame techniques of Drell, Levy, and Yan is equivalent to the manifestly covariant nonperturbative parton model of Landshoff, Polkinghorne, and Short. We also demonstrate that a general consequence of composite theories of hadrons wrth field-theoretic constituents which incorporates the above properties is thc existence of a constant energy-independent and qi-independent term in q/sup 2/) (a Kronecker delta'' delta /sub JO/ term) and a J = O fixed pole in T/sub 2/( nu , q/sup 2/). Sum rules for general Compton amplitudes are derived an d a discussion of mass renormalization for electromagnetic self-energy correction of hadrons is presented. We demonstrate that such sum rules are always finite, even in the presence of Regge behavior, when subtraction temns in the underlying parton-proton u-channel dispersion relation are taken into account. Analytical continuation in alpha is thus justified.
Research Organization:
Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305
Sponsoring Organization:
USDOE
NSA Number:
NSA-29-022505
OSTI ID:
4321751
Journal Information:
Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 10 Vol. 8; ISSN PRVDAQ; ISSN 0556-2821
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

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Cited By (11)

The spin structure of the nucleon journal January 1994
The spin structure of the nucleon journal January 2005
Two-photon exchange contribution to elastic electron-nucleonscattering at large momentum transfer journal July 2005
The hadronic properties of the photon in high-energy interactions journal April 1978
Exclusive electroproduction of lepton pairs as a probe of nucleon structure text January 2002
Flexible parametrization of generalized parton distributions from deeply virtual Compton scattering observables journal August 2011
GPD phenomenology and DVCS fitting: Entering the high-precision era journal June 2016
The spin structure of the nucleon journal June 2019
To What Extent is Gluon Confinement an Empirical Fact? journal December 2012
The Spin Structure of the Nucleon: Proceeding of International School of Nucleon Structure: 1st Course conference April 2017
Exclusive Electroproduction of Lepton Pairs as a Probe of Nucleon Structure journal January 2003

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Related Subjects

*COMPTON EFFECT-- SCATTERING AMPLITUDES
GAUGE INVARIANCE
MASS RENORMALIZATION
N64220* --Physics (High Energy)--Particle Interactions & Properties (Theoretical)--Electromagnetic
PARTON MODEL
REGGE POLES
SUM RULES