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The European Physical Journal A

, Volume 33, Issue 4, pp 339–348 | Cite as

Neutron-neutron scattering length from the reaction γd → πnn employing chiral perturbation theory

  • V. Lensky
  • V. Baru
  • E. Epelbaum
  • C. Hanhart
  • J. Haidenbauer
  • A. Kudryavtsev
  • U. -G. Meißner
Regular Article - Theoretical Physics

Abstract.

We discuss the possibility to extract the neutron-neutron scattering length ann from experimental spectra on the reaction γd → π+ nn . The transition operator is calculated to high accuracy from chiral perturbation theory. We argue that for properly chosen kinematics, the theoretical uncertainty of the method can be as low as 0.1 fm.

PACS.

12.39.Fe Chiral Lagrangians 13.60.Le Meson production 13.75.Cs Nucleon-nucleon interactions (including antinucleons, deuterons, etc.) 25.20.Lj Photoproduction reactions 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • V. Lensky
    • 1
  • V. Baru
    • 2
  • E. Epelbaum
    • 1
    • 3
  • C. Hanhart
    • 1
  • J. Haidenbauer
    • 1
  • A. Kudryavtsev
    • 2
  • U. -G. Meißner
    • 3
    • 1
  1. 1.Institut für KernphysikForschungszentrum Jülich GmbHJülichGermany
  2. 2.Institute of Theoretical and Experimental PhysicsMoscowRussia
  3. 3.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie)Universität BonnBonnGermany

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