1,721,059 research outputs found
Polynomiality of off-forward distribution functions in the chiral quark-soliton model
No full textviene dimostrata la proprieta' di polinomialita' delle distribuzioni partoniche generalizzate del nucleone calcolate nel modello a quark-solitoni chiral
Two-proton emission induced by real and virtual photons
No full textThe cross sections of the (e, e′2p) and (γ, 2p) reactions are calculated in an unfactorized form by integrating over the coordinates of the two ejected protons. Realistic short-range correlations and distorted wave functions for the two outgoing particles are included in the calculation. The nuclear current is the sum of a one- and a two-body part, corresponding to the process where a Δ-resonance is excited in the intermediate state. The (e, e′2p) cross section essentially depends on correlations, while the two-body current gives a minor contribution. In the (γ, 2p) cross section both effects are important. The asymmetry of the cross section produced by linearly polarized photons is extremely sensitive to the two-body current and could be exploited to investigate its contribution
Semi-relativistic charge-current density operator
No full textthe charge-current operator entering the electromagnetic interaction with an atomic nucleus is derived from a semirelativistic Hamiltonia
Erratum to: Extraction of partonic transverse momentum distributions from semi-inclusive deep-inelastic scattering, Drell-Yan and Z-boson production (Journal of High Energy Physics, (2017), 2017, 6, (81), 10.1007/JHEP06(2017)081)
No full textWe report some corrections to formulas and tables presented in the original article, to which we refer for definitions and further details
Nucleon recoil polarization in electromagnetic quasi-free knockout including two-body currents
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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