1,584 research outputs found
Semi-inclusive deep-inelastic scattering, parton distributions, and fragmentation functions at a future electron-ion collider
No full textWe present a quantitative assessment of the impact a future electron-ion collider would have in the determination of parton distribution functions in the proton and parton-to-hadron fragmentation functions through semi-inclusive deep-inelastic electron-proton scattering data. Specifically, we estimate the kinematic regions for which the forthcoming data are expected to have the most significant impact in the precision of these distributions, computing the respective correlation and sensitivity coefficients. Using a reweighting technique for the sets of simulated data with their realistic uncertainties for two different center-of-mass energies, we analyze the resulting new sets of parton distribution functions and fragmentation functions, which have significantly reduced uncertainties.Fil: Aschenauer, Elke C.. Brookhaven National Laboratory; Estados UnidosFil: Borsa, Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; ArgentinaFil: Sassot, Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; ArgentinaFil: Van Hulse, Charlotte. Universidad del País Vasco; España. Universidad de Dublin; Irlanda. University of the Basque Country; Españ
Possibilities for learning about the nucleon spin structure with positrons and electrons
No full textGender Mainstreaming in SADC and SADC-EU Trade Relations
No full textContains fulltext :
130414.pdf (Publisher’s version ) (Open Access
Ratios of helicity amplitudes for hard exclusive electroproduction on transversely polarized protons
No full textThe HERMES experiment collected a wealth of deep-inelastic scattering data using the 27.6 GeV polarized lepton beam at HERA and various pure gas targets, both unpolarized and polarized. This allowed for a series of diverse measurements. Among them are measurements of hard exclusive meson production, which provide information on generalized parton distributions (GPDs), in a complementary way to, e.g., deeply virtual Compton scattering. Access to these GPDs is possible through the measurement of helicity-amplitude ratios. Helicity-amplitude ratios from exclusive production on transversely polarized hydrogen are presented and discussed as well as compared to the theoretical ‘GK’ model
Selected HERMES results on semi-inclusive meson production
No full textThe HERMES experiment at DESY in Hamburg collected semi-inclusive deep-inelastic scattering data using the 27.6 GeV HERA lepton beam and various gaseous light and nuclear targets. Results of charge-separated hadron-identified multiplicities and multiplicity ratios, measured on light and heavier targets, are shown as well as azimuthal momentsmeasured fromunpolarized hydrogen and deuteriumtargets. Furthermore, Sivers and Collins amplitudes, extracted from measurements on a transversely polarized hydrogen target, are presented
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