Unravelling higher twists
TLDR
In this paper, a method of deriving the first power corrections (1/Q 2 ) to the leptoproduction structure functions is presented, based directly on the manipulation of Feynman diagrams, in which the transverse components of momenta and the gluon field control both kinematic and dynamical power corrections.About:
This article is published in Nuclear Physics.The article was published on 1983-02-07 and is currently open access. It has received 243 citations till now. The article focuses on the topics: Operator product expansion & Feynman diagram.read more
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Generalized parton distributions
TL;DR: In this article, the authors give an overview of the theory for generalized parton distributions and their role in small-x physics, and present strategies for phenomenological analysis, including the use of these quantities for describing soft contributions to exclusive processes at large energy and momentum transfer.
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The complete tree-level result up to order 1/Q for polarized deep-inelastic leptoproduction
Piet J. Mulders,R.D. Tangerman +1 more
TL;DR: In this paper, the authors present the results of the tree-level calculation of deepinelastic leptoproduction, including polarization of target hadron and produced hadron, and discuss the dependence on transverse momenta of the quarks which leads to azimuthal asymmetries for the produced hadrons.
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Hard Nuclear Processes and Microscopic Nuclear Structure
Leonid Frankfurt,Mark Strikman +1 more
TL;DR: In this article, the importance of light-cone dynamics, the physics of large longitudinal distances, and the presence of point-like quark-gluon configurations in hadrons for the theoretical description of high-energy processes (and especially nuclear shadowing) is explained.
Journal ArticleDOI
Universality of T-odd effects in single spin and azimuthal asymmetries
TL;DR: In this paper, the transverse-momentum-dependent distribution and fragmentation functions in space-like and time-like hard processes involving at least two hadrons, in particular, 1-particle inclusive leptoproduction, the Drell-Yan process and twoparticle inclusion hadron production in electron-positron annihilation, were analyzed.
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Handbook of perturbative QCD
George Sterman,John Smith,John Collins,James Whitmore,Raymond Brock,J. Huston,Jon Pumplin,W. K. Tung,H. Weerts,C.-P. Yuan,S. E. Kuhlmann,Sanjib Mishra,Jorge G. Morfin,Fredrick I. Olness,Joseph F. Owens,Jian-Wei Qiu,Davison E. Soper +16 more
TL;DR: In this paper, the fundamental theorems of quantum chromodynamics are discussed and a discussion of the global fitting approach to the determination of parton distributions in nucleons is presented.
References
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Asymptotic Freedom in Parton Language
Guido Altarelli,Giorgio Parisi +1 more
TL;DR: In this article, the main body of predictions of the theory for deep-inleastic scattering on either unpolarized or polarized targets is re-obtained by a method which only makes use of the simplest tree diagrams and is entirely phrased in parton language with no reference to the conventional operator formalism.
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Non-Lagrangian Models of Current Algebra
TL;DR: In this article, an alternative to specific Lagrangian models of current algebra is proposed, in which scale invariance is a broken symmetry of strong interactions, as proposed by Kastrup and Mack.
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Singularities and Discontinuities of Feynman Amplitudes
TL;DR: In this article, it was shown that the discontinuity across a branch cut starting from any Landau singularity is obtained by replacing Feynman propagators by delta functions for those lines which appear in the Landau diagram.
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Asymptotic Sum Rules at Infinite Momentum
TL;DR: In this paper, the authors show that the infinite-momentum limit for these commutators does not diverge, but may vanish, if the limit is nonvanishing.
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Evolution of parton densities beyond leading order: The non-singlet case
TL;DR: In this paper, the authors developed a technique based explicitly on the factorization properties of mass singularities, which allows one to calculate the evolution of parton densities beyond leading order.
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The complete tree-level result up to order 1/Q for polarized deep-inelastic leptoproduction
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