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Meson Production reaction on the N* resonance region

Meson Production reaction on the N* resonance region. T. Sato(Osaka Univ.). Motivation Dynamical model of meson production reaction Results summary. Dec 2007 KEK. Nucleon resonances. Particle LIJ Particle LIJ

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Meson Production reaction on the N* resonance region

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  1. Meson Production reaction on the N* resonance region T. Sato(Osaka Univ.) • Motivation • Dynamical model of meson production reaction • Results • summary Dec 2007 KEK

  2. Nucleon resonances Particle LIJ Particle LIJ N(1440) P11 **** **** *** D(1232) P33 **** **** *** N(1520) D13 **** **** **** D(1600) P33 *** *** ** N(1535) S11 **** **** *** D(1620) S31 **** **** *** N(1650) S11 **** **** *** D(1700) D33 **** **** *** N(1675) D15 **** **** **** D(1750) P31 * * - N(1680) F15 **** **** **** D(1900) S31 ** ** * N(1700) D13 ** *** ** D(1905) F35 **** **** * N(1710) P11 *** *** *** D(1910) P31 *** *** * N(1720) P13 **** **** ** D(1920) P33 *** *** * N(1900) P13 ** ** - D(1930) D35 *** *** ** N(1990) F17 ** ** * D(1940) D33 * * - N(2000) F15 ** ** - D(1950) F37 **** **** **** “The status of the one- and two-star states found in KH80 and CMB80 fits is now doubtful” PDG

  3. High precision data of electromagnetic meson production reaction Jlab, Bonn, Spring8, Mainz • Objective of our study : • Extract N* and Delta properties from meson production reaction • Interpret resonance parameters W<1.7GeV structure of ‘established’ resonances N(1535), N(1440) W>1.7GeV establish /discover nucleon resonances

  4. photo meson production reaction

  5. Coupled-channel analysis of meson production reaction differential cross section, polarization,.. amplitudes Resonance parameters

  6. Neutrino reaction in the resonance region Single pion production Pi-N invariant mass distribution H.Gallagher, nucl. Phys. Proc B112/Kitagaki et al. PRD34

  7. One and Two pion production cross section 1-pi 2-pi

  8. Nuclear effects in the N* resonance region A 1pi 1pi N 2pi 2pi Spreding potential of N*,Delta pion distortion Fermi average M. Hirata et al.PRC66 (2002)

  9. Dynamical model of meson production reaction B. Julia-Diaz, T.-S. H. Lee, A. Matsuyama, L.C. Smith, T. Sato Phys. Rep. 439 (2007) 193 Phys. Rev. C76 (2007) 065201 arXiv 0712.2283

  10. Effective Hamiltonian of Meson-Baryon • energy independent interaction, • derived using unitary transformation method

  11. solve coupled channel integral equation Three body unitarity

  12. Single pion photoproduction Our T-matrix MAID

  13. K-matrix Dynamical model

  14. Status on the analysis of meson production reaction Julia-Diaz, Lee, Matsuyama, Sato Julia-Diaz, Lee, Matsuyama, Smith, Sato Julia-Diaz, Kamano Lee, Matsuyama, Sato Paris, Lee, Sato Lee, Sibirtsev, Tsushima Durand, Julia-Diaz, Lee, Saghai, Sato

  15. Pion nucleon elastic scattering • Pion-nucleon scattering W<2GeV, S,P,D,F waves • One N*( two N* for P33,P11,S11,D13) • Coupling constants, form factors  fitting SAID of GWU/VPI • Refine parameters by comparing cross section data

  16. Total cross section

  17. I=1/2 Re Im I=3/2

  18. Pion photoproduction • Vary bare gN-N* amplitudes fitting data • (total, differential cross section W<1.52GeV) • Coupled channel effects on differential cross section

  19. Polarization (beam asymmetry)

  20. Resonance parameters • Meson cloud effects on gNN* form factors

  21. Meson-cloud effects on resonance vertex

  22. Probe N* using meson-baryon r<R LQCD r>R Meson-Baryon reaction

  23. SUMMARY Sensitivity on N* symmetry: iso-spin spin-parity near threshold meson dynamical: higher Q2 region non-resonant resonance

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