Quark orbital angular momentum: can we learn about it from GPDs and TMDs?

It is known how to access information on quark orbital angular momentum from generalized parton distribution functions, in a certain specified framework. It is intuitively expected, that such information can be accessed also through transverse momentum dependent distribution functions, but not known how. Now quark models provide promising hints. Recent results are reviewed.Comment: proceeding of the "4th Workshop on Exclusive Reactions at High Momentum Transfer," 18-21 May 2010, Jefferson La

Transverse momentum dependent distribution functions in a covariant parton model approach with quark orbital motion

Transverse parton momentum dependent distribution functions (TMDs) of the nucleon are studied in a covariant model, which describes the intrinsic motion of partons in terms of a covariant momentum distribution. The consistency of the approach is demonstrated, and model relations among TMDs are studied. As a byproduct it is shown how the approach allows to formulate the non-relativistic limit.Comment: 16 page

Direct water treatment by APGD with rotating electrodes

The APGD with rotating star-shaped electrodes was applied directly to the surface of liquid as a counter electrode. It was shown that the rotation of electrodes enables the stabilization of the discharged. A high concentration of H₂O₂ and nitrates were measured. The high level of microbial reduction was shown for inoculated deionized water treated by APGD with rotating electrodes.Використовувався тліючий розряд атмосферного тиску (APGD) між обертовим зіркоподібним електродом і поверхнею води в якості другого електрода. Показано, що обертання електродів дозволяє стабілізувати розряд. Була зафіксована висока концентрація H₂O₂ та нітратів. Високий рівень мікробного зменшення було показано для інокульованої деіонізованої води, обробленої APGD з обертовими електродами