Conveners
Parallel Session 3 - Few-Body Physics WG
- Assumpta Parreno Garcia (University of Barcelona)
- Dean Lee (North Carolina State University)
- Akaki Rusetsky (HISKP, University of Bonn)
Ashot Gasparyan
(Ruhr University, Bochum)
6/30/15, 2:30 PM
Few-Body Physics Working Group
Talk
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]....
Ruprecht Machleidt
(University of Idaho, Moscow)
6/30/15, 2:45 PM
Few-Body Physics Working Group
Talk
We have calculated the nucleon-nucleon (NN) interaction up to sixth order (N5LO) of chiral perturbation theory [1,2]. Previous calculations [3] extended only up to N3LO (fourth order) and typically showed a surplus of attraction, particularly, when the πN LECs from πN analysis were applied consistently. Furthermore, the contributions at N2LO and N3LO are both fairly sizeable, thus, raising...
Hermann Krebs
(Ruhr University Bochum)
6/30/15, 3:00 PM
Few-Body Physics Working Group
Talk
Three-nucleon forces play very important role in few and many-body simulations of nuclei/nuclear reactions at low energy. Knowledge of their precise form might lead to resolution of long standing puzzles in few-nucleon physics (e.g. Ay-puzzle in elastic nucleon deuteron scattering). Chiral effective field theory provides a systematically improvable tool for their calculation. By now...
Luca Girlanda
(Universita del Salento, Lecce & INFN-Lecce)
6/30/15, 3:15 PM
Few-Body Physics Working Group
Talk
Despite long-lasting efforts in the determination of a realistic three-nucleon force (TNF), none of the presently available models leads to a satisfactory description of bound and scattering states of the $A=3$ system. It seems natural to ascribe the above situation to the fact that these models include a very small number of adjustable parameters, compared to the two-nucleon interaction...
Henryk witala
(Jagiellonian University, Krakow)
6/30/15, 3:30 PM
Few-Body Physics Working Group
Talk
Comparison of theoretical predictions based on a nucleon-nucleon potential with data for elastic nucleon-deuteron (Nd) scattering and nucleon induced deuteron breakup reveals the importance of the three-nucleon force (3NF). Inclusion of semi-phenomenological 3NF models into calculations in many cases improves the data description. However, some serious discrepancies remain even when 3NF is...
Elzbieta Stephan
(University of Silesia, Katowice)
6/30/15, 3:45 PM
Few-Body Physics Working Group
Talk
Systems of three nucleons can serve as a validation tool for the modern approaches to describe nuclear interaction. At the first stage the investigations were mainly focused on elastic nucleon-deuteron scattering, slowly extending to systematic measurements of the deuteron breakup reaction [1,2,3]. Intermediate energies, below the threshold for pion production, deserve special attention: it is...
