Improved model independent upper bounds on the weak transition form factors are derived using inclusive sum rules. Comparison of the new bounds with the old ones is made for the form factors hA1 and hV in B → D decays. [email protected] 1 A set of model independent bounds has been derived to provide a restriction on the shape of weak transition form factors [1–3]. They have been extensive...

Improved model independent upper bounds on the weak transition form factors are derived using inclusive sum rules. Comparison of the new bounds with the old ones is made for the form factors hA1 and hV in B → D decays. [email protected] 1 A set of model independent bounds has been derived to provide a restriction on the shape of weak transition form factors [1–3]. They have been extensive...

We recalculate the pion electromagnetic form factor based on the pertur-bative QCD formalism that includes the Sudakov resummation. We take into account the evolution of the pion wave function in b, which represents the transverse extent of the pion. An infrared enhancement is observed when 1/b approaches Λ QCD. We propose to freeze the evolution of the wave function at some scale above Λ QCD ,...

In a double polarised electron scattering experiment data have been taken from which G n E can be extracted for Q 2 = 0.2 GeV 2 /c 2. We have measured asymmetries corresponding to the spin-spin correlation functions A ′ x and A ′ z and to the target analyzing power A 0 y. In order to investigate the influence of the reaction mechanisms and the different components of the 3 He wave function, als...

A vector mesonic correction to the deuteron form factors is considered which is analogous to the Glauber double scattering , process D This correction dominates the form factors at large , momentum transfer 0 A fit to the static magnetic moment of the deuteron yields a satisfactory fit to the magnetic scattering at large momentum transfer. (Submitted to Phys. Rev.)