1 / 45

Mikhail Bashkanov

Wasa- at - COSY. New Results on the ABC-Resonance Structure. Mikhail Bashkanov. Content. Resonance in Isospin decomposition , Open channels Resonance in elastic scattering . Two-pion production. “ s ”. N*. D(1600). N*. D. D. D. D. T p < 1.5 GeV.

fay
Download Presentation

Mikhail Bashkanov

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Wasa-at-COSY New Results on the ABC-Resonance Structure Mikhail Bashkanov

  2. Content • Resonance in • Isospin decomposition • , • Open channels • Resonance in elastic scattering

  3. Two-pion production “s” N* D(1600) N* D D D D Tp< 1.5 GeV

  4. Expectations in total cross section

  5. Total cross section pn d00 “ABC resonance” 70 MeV  NN*(1440) P. Adlarson et. al Phys. Rev. Lett. 106:242302, 2011

  6. Angular distribution in the peak J=3 J=1

  7. 1+ 3+ Quantum numbers of the structure pn d*  ∆∆d 00 Antisymmetrization: Jp=1+or 3+ : if LΔΔ=0 1+ excluded by ().3+ assigned pn  d 00 I=0 I=0,1 I=0 I=0,2

  8. M for different energies t-channel  “ABC effect”

  9. Δ π p d π n Δ Status ofTheoretical Description • pn  R DD  dp0p0 I(Jp) = 0(3+)

  10. Isospinrelations I=1 I=0

  11. Total cross section pN d P. Adlarson et. al Phys. Lett. B721 (2013) 229

  12. M inpN d

  13. M inpN d

  14. M inpN d

  15. Isospin violation 00 +-

  16. Non-fusion channel

  17. pn  pp-0 Conventional process +ABC  Conventional process Preliminary ABC “expected”

  18. Prediction for the open channels M. Albaladejo, E. Oset nucl-th:1304.7698

  19. Elastic channel

  20. dpnp + psp Kinematics neutron Proton spectator proton

  21. p p n n 3+Resonance in np p n L=2 p n L=4

  22. Total pncross-section Devlin et al, PRD8, 136 (73) LisowskI et al, PRL49, 255(82) SAID SAID + resonance

  23. p p n n Expectations SAID with resonance SAID

  24. p p n n Expectation SAID with resonance SAID SAID with resonance

  25. p p n n Reality SAID with resonance SAID SAID with resonance

  26. pn Vector AnalysingPower Very Preliminary SAID with resonance SAID SAID with resonance

  27. Conclusion • d*-resonance is seen in • Other open channels need to be analyzed (, ) • pn-elastic scattering exhibits fast phase motion • Good hints for a resonance in elastic channel • A discovery of a new resonance? • Dibaryon: , ,

  28. Thank you

  29. d* contribute in Ay as

  30. Proton analyzing power = -0.45 SAID

  31. and determination: = -0.45

  32. and determination: = -0.45

  33. and determination: = 0.18

  34. Beam polarization Polarization 2 0 Polarization 1 2

  35. pn Vector AnalysingPower Very Preliminary SAID SAID with resonance SAID with resonance

  36. Isospin Decomposition N*(1440)  [(1600)] Skorodko at al., Phys. Lett. B679 (2009) 30

  37. Beam polarization Polarization 2 0 Polarization 1 2

  38. Total cross section pp d+0 Shimizu et al. F. Kren et al.

  39. Total cross section pn d00

  40. Total cross section pn d+-

  41. Total cross section pn d+-

  42. M inpN d

  43. M inpN d

  44. M inpN d

  45. Isospin violation 00 +-

More Related