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6 papers · 2 filters
Studying the Sivers function by model calculations
A. Courtoy, S. Scopetta, V. Vento
A formalism is presented to evaluate the Sivers function in constituent quark models. A non-relativistic reduction of the scheme is performed and applied to the Isgur-Karl model. T…
Model calculations of the Sivers function satisfying the Burkardt Sum Rule
A. Courtoy, S. Scopetta, V. Vento
It is shown that, at variance with previous analyses, the MIT bag model can explain the available data of the Sivers function and satisfies the Burkardt Sum Rule to a few percent a…
Charge asymmetries in γγ\to \ell^+\ell^-+ ν's (\ell=μ, e) with polarized photons in the Standard Model
D. A. Anipko, M. Cannoni, I. F. Ginzburg +3
It is shown that in reaction γγ\to\ell^+\ell^-+ν's at \sqrt{s}>200 GeV with polarized photons, large and well observable differences arise in the distribution of positive and negat…
Minijets, soft gluon resummation and photon cross-sections
R. M. Godbole, A. Grau, G. Pancheri +1
We compare the high energy behaviour of hadronic photon-photon cross-sections in different models. We find that the photon-photon cross-section appears to rise faster than the pure…
The neutron transversity from semi-inclusive DIS off 3He
S. Scopetta
A calculation of nuclear effects in the extraction of neutron single spin asymmetries in semi-inclusive deep inelastic scattering off 3He is described. In the kinematics of forth-c…
A quark model analysis of the Sivers function
A. Courtoy, F. Fratini, S. Scopetta +1
We develop a formalism to evaluate the Sivers function. The approach is well suited for calculations which use constituent quark models to describe the structure of the nucleon. A…