Gießen 2007 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 29: Elektromagnetische und Hadronische Sonden

HK 29.6: Vortrag

Mittwoch, 14. März 2007, 15:30–15:45, A

Electron and pion scattering off nuclei — •Oliver Buss¹, Luis Alvarez-Ruso², and Ulrich Mosel¹ — ¹Institut für Theoretische Physik, Universität Giessen, Germany — ²Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia-CSIC

We present a treatment of pion and electron scattering off nuclei within the framework of a Boltzmann-Uehling-Uhlenbeck (BUU) transport model. In this approach we realize a full coupled channel treatment and include medium modifications such as mean-field potentials, fermi motion and width modifications. We have applied the GiBUU model to the description of the double charge exchange (DCX) reaction of pions with different nuclear targets at incident kinetic energies of 120-180 MeV [1]. The DCX process is highly sensitive to details of the interactions of pions with the nuclear medium and, therefore, represents a major benchmark for any model of pion scattering off nuclei at low and intermediate energies. We discuss the impact of surface effects and the dependence on the nuclear mass number. We have achieved a good quantitative agreement with the extensive data set obtained at LAMPF. Furthermore, we present a description of electron induced reactions, i.e. pion production, off nuclei. We consider the scattering of electrons off the bound nucleons in an impulse approximation and investigate medium modifications to exclusive particle production cross sections and compare our results to available data.

Work supported by DFG.

[1] O. Buss, L. Alvarez-Ruso, A. B. Larionov and U. Mosel; Phys. Rev. C 74, 044610 (2006).