Izvorni znanstveni članak

Exclusive pion electroproduction off nucleons and nuclei

Murat M. Kaskulov ; Institut für Theoretische Physik, Universität Giessen, D-35392 Giessen, Germany
Ulrich Mosel ; Institut für Theoretische Physik, Universität Giessen, D-35392 Giessen, Germany

Sažetak

We present our results for the exclusive electroproduction of pions off nucleons and nuclei at high values of Q2 . In electroproduction of nuclei A(e, e′π) we consider the color transparency (CT) effect recently observed at JLAB. It is shown that the description of π production off nucleons is mandatory for the proof of the CT signal at JLAB. We further develop the models for exclusive production of π off nucleons at JLAB and HERMES. We first describe a model based on exclusive-inclusive connection. In the second approach, we combine a Regge pole approach with the residual effect of nucleon resonances. The nucleon resonances are described using a dual connection between the exclusive form factors and inclusive deep inelastic structure functions. We present the results for the beam spin azimuthal asymmetries measured at JLAB in exclusive electroproduction of charged and neutral pions.

Ključne riječi

exclusive electroproduction of pions; nucleon and nuclear targets; high Q2; color transparency effect; exclusive-inclusive connection model; Regge pole approach; beam spin azimuthal asymmetries

Hrčak ID:

304725

URI

https://hrcak.srce.hr/304725

Datum izdavanja:

1.11.2011.

Podaci na drugim jezicima: hrvatski

Posjeta: 140 *