June 29, 2015 to July 3, 2015
Europe/Rome timezone

Chiral two-nucleon dynamics, analyticity and dispersion relations

Jun 30, 2015, 2:30 PM
Room PS1 (Building E, Polo Fibonacci, Pisa)

Room PS1

Building E, Polo Fibonacci, Pisa

Talk Few-Body Physics Working Group Parallel Session 3 - Few-Body Physics WG


Ashot Gasparyan (Ruhr University, Bochum)


Nucleon-nucleon interaction is studied using relativistic form of the chiral Lagrangian. Partial-wave amplitudes are computed in chiral perturbation theory at next-to-next-to-leading order in the subthreshold region. The most general constraints set by analyticity and unitarity are implemented to extrapolate the amplitudes into the physical region using the method developed in Refs. [1,2]. Empirical phase shifts are described up to laboratory energies T_{lab} approx 250 MeV. The issues related with renormalization and convergence of perturbation theory are investigated. [1] A. Gasparyan, M. F. M. Lutz, Nucl. Phys. A848 (2010) 126-182. [2] A. M. Gasparyan, M. F. M. Lutz and E. Epelbaum, Eur.Phys. J. A 49, 115 (2013)

Primary author

Ashot Gasparyan (Ruhr University, Bochum)


Prof. Evgeny Epelbaum (Ruhr University of Bochum) Prof. Matthias Lutz (GSI, Darmstadt)

Presentation materials