Journal ArticleDOI
Meson widths and form factors at intermediate momentum transfer in non-perturbative QCD
B.L. Ioffe,Andrei V. Smilga +1 more
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In this paper, a general method is proposed for the QCD based calculations of form factors at intermediate Q 2 and of the partial widths of the low-lying mesonic resonances.About:
This article is published in Nuclear Physics.The article was published on 1983-05-02. It has received 145 citations till now. The article focuses on the topics: QCD sum rules & Quantum chromodynamics.read more
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Unraveling hadron structure with generalized parton distributions
TL;DR: The generalized parton distribution (GPD) as discussed by the authors was introduced as a universal tool to describe hadrons in terms of quark and gluonic degrees of freedom, and has been used for a long time in studies of hadronic structure.
Journal ArticleDOI
A measurement of the space-like pion electromagnetic form factor
Salvator Roberto Amendolia,Metin Arik,B. Badelek,G. Batignani,G. A. Beck,F. Bedeschi,E.H. Bellamy,E. Bertolucci,D. Bettoni,Halina Bilokon,G. Bologna,L. Bosisio,C. Bradaschia,Marco Budinich,A. Codino,Mauro Dell'Orso,B. D'Ettorre Piazzli,M. Enorini,Fabrizio Fabbri,F. Fidecaro,Lorenzo Foà,Ettore Focardi,S.G.F. Frank,A. Giazotto,Mario Giorgi,M. G. Green,J. Harvey,G.P. Heath,Murrough Landon,Paolo Laurelli,F. Liello,G. Mannocchi,P. V. March,P.S. Marrocchesi,A. Menzione,E. Meroni,E. Morini,Luigi Moroni,Edoardo Milotti,P. Picchi,Francesco Ragusa,Luciano Ristori,L. Rolandi,S. Sala,C.G. Saltmarsh,A. Saoucha,L. Satta,A. Scribano,P. Spillantini,A. M. Stefanini,D. Storey,J. A. Strong,R. Tenchini,Guido Tonelli,G. Triggiani,W. von Schlippe,E. Van Herwijnen,A. Zallo +57 more
TL;DR: The pion form factor has been measured in the space-like q 2 region 0.014 to 0.26 (GeV/c ) 2 by scattering 300 GeV pions from the electrons of a liquid hydrogen target.
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Calculations in external fields in quantum chromodynamics. Technical review
TL;DR: In this paper, the main emphasis is put on gluon operators which appear in expansion of n-point functions induced by colourless quark currents, and two convenient schemes are discussed in detail: the abstract operator method and the method based on the Fock-Schwinger gauge.
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Nucleon magnetic moments and magnetic properties of the vacuum in QCD
B.L. Ioffe,Andrei V. Smilga +1 more
TL;DR: In this paper, the magnetic moments of a proton and a neutron are calculated in the QCD sum rule approach, and the substantial role of the external electromagnetic field induced vacuum expectation values, the most important of which is connected with quark condensate magnetic susceptibility, is demonstrated.
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The perturbative pion form factor with Sudakov suppression
Hsiang-nan Li,George Sterman +1 more
TL;DR: In this article, a modified perturbative expression for the pion electromagnetic form factor in perturbive QCD was given, which includes Sudakov suppression of the elastic scattering of quarks that are isolated in space.
References
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Journal ArticleDOI
QCD and resonance physics. theoretical foundations
TL;DR: In this paper, a systematic study is made of the non-perturbative effects in quantum chromodynamics, where the basic object is the two-point functions of various currents and the terms of this series are shown to be of two distinct types.
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QCD and Resonance Physics: Applications
TL;DR: In this article, the dispersion charmonium theory was extended to include power terms due to the nonperturbative effects of QCD, and an estimate for the gluonic vacuum expectation value was derived.
Journal ArticleDOI
Exclusive processes in quantum chromodynamics: Evolution equations for hadronic wavefunctions and the form factors of mesons
TL;DR: In this article, the eigenvalues of the evolution equations appear as exponents in anomalous logarithm corrections to the nominal power law of form factors determined by dimensional counting.
Journal ArticleDOI
Factorization and asymptotic behaviour of pion form factor in QCD
A.V. Efremov,Anatoly Radyushkin +1 more
TL;DR: In this article, an all-orders, all-logarithms proof of the factorization theorem for the pion electromagnetic form factor in QCD is presented. The proof is based on the analysis of the large momentum behaviour of Feynman diagrams in a parametric representation.
Journal ArticleDOI
Particles, Sources and Fields
TL;DR: In this article, the authors present a theory intermediate in position between operator field theory and S-matrix theory, which rejects the dogmas of each and gains thereby a calculational ease and intuitiveness that make it a worthy contender to displace the earlier formulations.