Helmholtz-Zentrum Dresden-Rossendorf (not a summary of summaries) B. Kämpfer Conclusion (not a summary of summaries)
Emergence of Structure nuclei Transport Codes Nuclei ab initio calc. e.w. Nuclear „Theory“ hadrons e.w. Hadrons EFT: ChPT, ... Phenomenological Models: OBE, ... hadrons Gravity QCD e.w. symmetry 2 1 3 Standard Model Quantum Field Theory
NN Bremsstrahlung S Multi-OBE* Model guidance principle: Kroll-Ruderman N + ISI + FSI guidance principle: minimum number of diagrams 36
ad hoc formfactors Tree-Level Interaction Lagrangians particles resonances ad hoc formfactors N N may destroy symmetries parametrie soft QCD Plain Multi-OBE Model: missing unitarity K Matrix
VMD model p p n n HADES data DLS data PLB 690 (2010) 118 Phys. Rev. Lett. 79 (1997) 1229 PRC 2009 Shyam, Mosel, PRC 82 (2010) 062201 Kaptari, BK, NPA 764 (2006) 338 PRC 80 (2009) 064003 VMD model p n p n
p n n p t channel
OBE guidance: minimum set of diagrams s channel u channel OBE guidance: minimum set of diagrams Regge type approaches: duality of s vs. t channels interesting aspect: quantum interference of Soyeur, Lutz, Friman, nucl-th/0003013 Titov, BK, EPJA 12 (2001) 217, Titov, BK, Reznik, PRC 65 (2002) 065202 Lutz, Friman, Soyeur, NPA 713 (2003) 97
- probes the isoscalar part of e.m. current - is sensitive to resonance dynamics parameters (couplings & phases) from quark model Riska, Brown, NPA 679 (2001) 577 1.6 GeV 1.8 GeV
M = 0.6 GeV
Going into the Charm Sector / FAIR very different predictions by Haidenbauer, Krein, PLB 687 (2010) 314 Titov, BK, PRC 78 (2008) 025201 Kaidalov Goritschnig „an impressive qualitative difference“
Conclusion Hadron physics needs theory tools: Epelbaum Leupold Lutz Meissner Oset ... Hadron physics needs theory tools: systematic book keeping (expansion) parameter(s) (counting scheme) Phenomenological models have merits but need control
Dropping Masses? Volkov 1935 Phys. Lett. 19 (1966) 702 not yet found not found
HADES data DLS data arXiv:0910.5875 Phys. Rev. Lett. 79 (1997) 1229 PRC 2009 NPA 2006