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Few-body physics: Three-body force effects

Few-body physics: Three-body force effects. Nasser Kalantar-Nayestanaki Kernfysisch Versneller Instituut Groningen November 18, 2005. Bound-state energies with GFMC. Courtesy S. Pieper, Argonne. (+3NF). Few-body activities at KVI.

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Few-body physics: Three-body force effects

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  1. Few-body physics: Three-body force effects Nasser Kalantar-Nayestanaki Kernfysisch Versneller Instituut Groningen November 18, 2005 NuPECC meeting, 18 Nov. 2005

  2. Bound-state energies with GFMC Courtesy S. Pieper, Argonne (+3NF) Few-body physics: Three-body force effects

  3. Few-body activities at KVI • Study of the nucleon-nucleon interaction beyond the elastic scattering • Real-photon bremsstrahlung • Virtual-photon bremsstrahlung • Study of three-body systems • Hadronic probes (three-body force effects) & • Electromagnetic probes & • Study of strangeness in proton and deuteron Few-body physics: Three-body force effects

  4. Three-Body Forces in Nature Few-body physics: Three-body force effects

  5. Three-Body Forces in Nature Few-body physics: Three-body force effects

  6. N N N Three-body forces in Nuclear physics  Few-body physics: Three-body force effects

  7. Three-body forces and Wikipedia A three-body force is a force that does not exist in a system of two objects but appears in a system of three objects (three-body system like in Euler's three-body problem) or more. In physics, an intuitive example of a three-body force is the case of charged, metallic spheres: the charge distribution at the surface of two spheres placed close to each other will be modified, and thus the total force felt by a third sphere cannot be described by the sum of the forces from the two other spheres taken individually. The fundamental strong interaction seems to exhibits such behaviours. In particle physics, the interactions between the three quarks that compose baryons can be described in a diquark model which is equivalent to the hypothesis of a three-body force. There is growing evidence in the field of nuclear physics that three-body forces exist among the nucleons inside atomic nuclei (three-nucleon force). As an analogy, if we identify bodies with human beings and forces with emotions, jealousy is a good example of three-body force: it is not felt as long as only two persons are acting, but it can show up as soon as a third person enters into the scene. Retrieved from "http://en.wikipedia.org/wiki/Three-body_force" Few-body physics: Three-body force effects

  8. ndscattering np scattering Total nd Cross sections High precision data from Los Alamos W.P. Abfalterer et al., PRL 81, 57 (1998) Only 2NF Few-body physics: Three-body force effects

  9. SALAD 1995-2002 BBS BINA 2004-??? PB AGOR Facility Detectors Few-body physics: Three-body force effects

  10. pd elastic scattering cross sections K. Ermisch et al., PRC 68, 054004 (2003), PRC 71, 064004 (2005) Few-body physics: Three-body force effects

  11. pd elastic scattering cross sections K. Ermisch et al., PRC 68, 054004 (2003), PRC 71, 064004 (2005) Few-body physics: Three-body force effects

  12. pd elastic scattering cross sections K. Ermisch et al., PRC 68, 054004 (2003), PRC 71, 064004 (2005) Few-body physics: Three-body force effects

  13. pd elastic scattering cross sections K. Ermisch et al., PRC 68, 054004 (2003), PRC 71, 064004 (2005) Few-body physics: Three-body force effects

  14. pd elastic scattering cross sections K. Ermisch et al., PRC 68, 054004 (2003), PRC 71, 064004 (2005) Few-body physics: Three-body force effects

  15. pd elastic scattering cross sections K. Ermisch et al., PRC 68, 054004 (2003), PRC 71, 064004 (2005) Few-body physics: Three-body force effects

  16. pd elastic scattering cross sections (theory –data)/data K. Ermisch et al., PRC 68, 054004 (2003), PRC 71, 064004 (2005) Few-body physics: Three-body force effects

  17. pd elastic scattering cross sections (theory –data)/data K. Ermisch et al., PRC 68, 054004 (2003), PRC 71, 064004 (2005) Few-body physics: Three-body force effects

  18. Ermisch et al., PRC71, 064004 (2005) Effect of 3NF as a function of Energy Few-body physics: Three-body force effects

  19. Spin-Transfer Coefficients @ Ed = 180 MeV Preliminary results Few-body physics: Three-body force effects

  20. The break-up channel St. Kistryn, PRC 68, 054004 (2003); & PRC 72, 044006 (2005) Few-body physics: Three-body force effects

  21. s2NF+3NF – s2NF Ds = s2NF+3NF Bochum-Cracow Group (2NF=CDB, 3NF=TM’) Ep = 190 MeV The break-up channel Few-body physics: Three-body force effects

  22. The new 4 detector, BINA BINA @ KVI ~3 meters beam Big Instrument for Nuclear-polarization Analysis (BINA) Few-body physics: Three-body force effects

  23. Wire chambers + analyzer 150 phoswich Scintillators =Target chamber Thin scintillators for particle identification Forward scintillators (E-wall) The new 4 detector, BINA Few-body physics: Three-body force effects

  24. The new 4 detector, BINA Few-body physics: Three-body force effects

  25. Summary & Outlook • The search for 3BF effects is taking place at several laboratories. • At KVI, we have set up a comprehensive program to study the three-body systems. • The situation for the three-body systems is like the situation of NN of some 30 years ago! • The four-body systems is virgin territory at this moment and needs desperate attention. Few-body physics: Three-body force effects

  26. Acknowledgements H.R. Amir Ahmadi, J.C.S. Bacelar, R. Benard, A.M. van den Berg, R. Castelijns, M. Eslami-Kalantari, R. Bieber, K.Ermisch, E. Van Garderen, V.M. Hannen, M.N. Harakeh, M. de Huu, H. Huisman, M. Kis, H. Löhner, H. Mardanpour, A. Mehmandoost, J.G. Messchendorp, M. Mahjour-Shafiei, A. Ramazani, S. Schadmand, S. Shende, M. Volkerts, S.Y. van der Werf, H. Wörtche + KVI theory group + Cracow Experimental Group + Theoretical support from Bochum-Cracow + Hannover group + TAPS collaboration Few-body physics: Three-body force effects

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