Impulse approximation in nuclear pion production reactions: Absence of a one-body operator

Double Pion Production Reactions

We report on reactions producing two pions induced by real and virtual photons or nucleons. The role of different resonances in these reactions is emphasized. Novel results on coherent 2π photoproduction in nuclei are also reported. 1 Double pion photoproduction on the nucleon. The γN → π+π−N reaction is attracting attentions of both theoretical and experimental groups and is bound to play a si...

Pion Production in Neutrino-Nucleon Reactions

We construct a model for the weak pion production off the nucleon, which in addition to the weak excitation of the ∆(1232) resonance and its subsequent decay into Nπ , it includes also some background terms required by chiral symmetry. We re-fit the CA 5 (q 2) form factor to the flux averaged νμ p → μ−pπ+ ANL q2−differential cross section data, finding a substantially smaller contribution of th...

Asymptotic Behavior of Pion Clusters in Different Nuclear Reactions

Nuclear symmetry potential in the relativistic impulse approximation

Zeng-Hua Li, Lie-Wen Chen, 2 Che Ming Ko, Bao-An Li, and Hong-Ru Ma Institute of Theoretical Physics, Shanghai Jiao Tong University, Shanghai 200240, China Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China Cyclotron Institute and Physics Department, Texas A&M University, College Station, Texas 77843-3366, USA Department of Physics, Texas ...

DVCS on spinless nuclear targets in impulse approximation

Within the impulse approximation, we derive expressions for the amplitude of deeply virtual Compton scattering on spinless nuclei in terms of the generalized parton distributions of the nucleon. As an application, nuclear effects in the beam-charge and single-spin asymmetries are discussed.