Overview of chiral predictions for neutral pion photo-/electroproduction off protons, neutrons and deuterons

Thomas Hemmert

Theoretische Physik T39, TU Muenchen

I will present an overview on recent calculations in chiral effective field theories regarding the low energy behaviour of neutral pion photo-/electroproduction off protons [1], neutrons [2] and deuterons [3]. I will also discuss the role of explicit Delta(1232) degrees of freedom [4] for some of these processes.

Selected References:

  1. V. Bernard et al., hep-ph/0102066 (2001); V. Bernard et al., Nucl. Phys. A607, 379 (1996).
  2. V. Bernard et al., Z. Phys. C70, 483 (1996).
  3. S.R. Beane et al., Nucl. Phys. A618, 381 (1997); V. Bernard et al., Phys. Rev. C61, 058201 (2000).
  4. T.R. Hemmert et al., Phys. Lett. B395, 89 (1997); V. Bernard et al., forthcoming.