منابع مشابه
Anomalous Sudakov Form Factors
While radiative corrections of infrared origin normally depress high energy amplitudes (Sudakov form factors), we find that in some cases resummation of leading effects produces exponentials with positive exponents, giving rise to amplitudes that grow indefinitely with energy. The effect happens in broken gauge theories like the electroweak sector of the Standard Model, and is related to the ex...
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The theory of the on-shell Sudakov form factor to all order of logarithms is explained.
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We study the uncertainties of Sudakov form factors as the basis for parton shower evolution in Monte Carlo event generators. We discuss the particular cases of systematic uncertainties of parton distribution functions and scale uncertainties.
متن کاملSudakov Form Factors in Leptoproduction of Vector Mesons
It is shown that Sudakov form factors for a colour dipole in a QCDinspired model of leptoproduction of vector mesons reduce the value of the cross section of the process by an order of magnitude. They suppress the large size quark-antiquark pairs and unequal sharing of energy among the components of the dipole. Some freedom in the choice of the model parameters is also discussed. The idea of in...
متن کاملSudakov Form Factors with an Effective Theory of Particle Worldlines
Sudakov-type form factors for quark vertex functions in QCD are discussed using a worldline approach. Typeset using REVTEX ∗Invited talk presented at the XI International Conference Problems of Quantum Field Theory, in memory of D. I. Blokhintsev, July 13-17, 1998, JINR, Dubna, Russia. To be published in the Proceedings. 1 1. Introductory remarks A very convenient context for investigating the ...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2010
ISSN: 1029-8479
DOI: 10.1007/jhep03(2010)072