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ニュートリノ原子核反応

ニュートリノ原子核反応. 佐藤　透 ( 阪 大　理 ). Our previous works on neutrino reaction single pion production(Delta region) nuclear coherent pion production Plan neutrino induced meson production (W<2GeV) trial : inverse transformation . JPARC Dec. 18 2011 . Neutrino induced pion production .

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ニュートリノ原子核反応

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  1. ニュートリノ原子核反応 佐藤　透 (阪大　理) Our previous works on neutrino reaction single pion production(Delta region) nuclear coherent pion production Plan neutrino induced meson production (W<2GeV) trial : inverse transformation JPARCDec. 18 2011

  2. Neutrino induced pion production Dynamical model of pion production in Delta_33 region Pion electroproduction Structure functions (data CLAS from C. Smith,2004)

  3. Barish et al.(79) ANL Kitagaki et al. (90) BNL Jones et al. (89) CERN

  4. QE Pion production Sealock et al.(89)

  5. Our amplitudes are available in Adler-CGLN amplitude structure functions R(Q^2,W) ? home page for amplitudes and …. ??

  6. Nuclear effects in resonance region Delta-hole model Pion-nucleus interaction elastic scattering Pion absorption  total, inelastic, absorption cross section Medium effect on pion production, propagation of delta in nuclei  Coherent photo pion production, inelastic pion scattering Neutrino induced coherent pion production (exclusive reaction, bound final nucleus)

  7. Our model of coherent pion production Non-res res medium modification of pion production mechanism final state interaction: optical potential use t-matrix from dynamical model of piN and weak pion production for both transition operator and pi-Nucleus optical potential

  8. prediction of coherent pion photoproduction Without medium effect on delta-hole propagator/ FSI of pion Full Only Delta for pion production operator

  9. CCpi+ NCpi0 Flux averaged cross section • agreement among recent theoretical results • pi+/pi0 ration ~ 2 due to Delta_33 dominance ( Kurimoto et al. PRD81(10) )

  10. * pion momentum distribution, angular distribution • neutrino energy dependence • … • are available

  11. beyond Delta_33 (N*,Delta region) and DIS data :PRC81 055213 Increasing importance of 2pion production above delta F2 Model available for vector current , W<2GeV Coupled-channel model of Excited Baryon Analysis Cener(EBAC)  with extension for axial current fill gap between QE and DIS Data: hep-ph/0309052

  12. Figure: E. Pasyuk’s talk at Hall-B/EBAC meeting

  13. Single pion electroproduction (Q2 > 0) Julia-Diaz, Kamano, Lee, Matsuyama, Sato, Suzuki, PRC80 025207 (2009) Fit to the structure function data (~ 20000) from CLAS p (e,e’ p0) p W < 1.6 GeV Q2 < 1.5 (GeV/c)2 is determined at each Q2. g q (q2 = -Q2) N N* N-N* e.m. transition form factor

  14. Current neutrino reaction model : Delta_33 region (Sato,Uno,Lee) • electroproduction model W< 2GeV (EBAC) • Extend to N* region ANN* coupling from piNN* using PCAC • Interest for transition (N* <-> DIS) region

  15. Can we separate QE? Reconstruct from Quasi-elastic scattering true only for reaction on free nucleon

  16. FSI ‘QE’ 2 + + … ISI Quantum mechanical interference among various amplitudes

  17. Simple exercise (Inverse problem) example Assume reliable calculation available Extract from Method : MEM

  18. Delta_33, pion production nuclear excitation, Quasi-Elastic, Resonance, Deep Inelastic excited states(‘bound’) Giant resonance quasi-elastic (QE) energy transfer spatial momentum transfer

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