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The Study of the Deuteron Spin Structure in Reaction of Polarized Deuteron

The Study of the Deuteron Spin Structure in Reaction of Polarized Deuteron Fragmentation in Cumulative Pions. A.Litvinenko. litvin@moonhe.jinr.ru. VBLHE, JINR, DUBNA. for SPHERE Collaboration. Spin-Praha-2004. Outline. Motivation: Deuteron breakup

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The Study of the Deuteron Spin Structure in Reaction of Polarized Deuteron

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  1. The Study of the Deuteron Spin Structure in Reaction of Polarized Deuteron Fragmentation in Cumulative Pions . A.Litvinenko litvin@moonhe.jinr.ru VBLHE, JINR, DUBNA for SPHERE Collaboration SPIN-Praha-2004 Spin-Praha-2004

  2. Outline. • Motivation: • Deuteron breakup • Cumulative pions production • Results: • Experimental Method • Results and Theoretical Models • Summary • Discussion and future plans SPIN-Praha-2004

  3. Deuteron breakup (Some experience) • Spectrum • Relativistic effects + IA+rescatt. • Polarization observables Exp. Data can not be described by IA+rescatt. New degrees of freedom ? More sophisticated DWF? SPIN-Praha-2004

  4. A.P.Kobushkin, Proc. of the Int.Symp. “Dubna Deuteron-93”,p.71,Dubna,1993 SPIN-Praha-2004

  5. RIA Paris DWF; RIA+FSI Paris DWF G.I.Lykasov,EPAN, v.24,p.59,(1993) SPIN-Praha-2004

  6. Cumulative pions (Some experience) Relativistic effects + IA+ new deg. of freedom IA RIA diff.cross sect. RIA +6q(4%) A.Illarionov, A.Litvinenko, G.Lykasov, Yad.Fiz., v.66,p.1, (2003) data--A.M.Baldin et al,Nucl.Phys. A434,p.695,(1985) SPIN-Praha-2004

  7. SPIN-Praha-2004

  8. SPIN-Praha-2004

  9. Tensor Analyzing Power Data presentation; Cumulative Scale variable Reason – Scaling of cross section Typical value SPIN-Praha-2004

  10. Squares -- Circles-- Trian. Down-- Trian. Up -- Black - - 9.0 —6.2 GeV/c , = 3 Gev/c S.V.Afanasiev et al., Nucl.Phys.,A 625,p.817 (1998) Red- -9.0 GeV/c , - 3.5—5.3 GeV/c S.Afansiev et al., Phys.Lett., B445,p.14,(1998) Blue --5.0 Gev/c, -1.4—2.3 GeV/c (SPHERE preliminary) SPIN-Praha-2004

  11. Blue -- Paris DWF Red -- Paris DWF + A.Yu.Illarionov,A.G.Litvinenko,G.I.Lykasov, Eur.Phys.J,A14,p.247,(2002) SPIN-Praha-2004

  12. Tensor Analyzing Power -- will not be discussed here SPIN-Praha-2004

  13. Lilac Black (Preliminary) Blue SPIN-Praha-2004

  14. Dependence SPIN-Praha-2004

  15. Initial Energy Dependence SPIN-Praha-2004

  16. Blue Red SPIN-Praha-2004

  17. Summary • The Data for and have been obtained In the Reaction: GeV/c mrd., • A Dependence – not visible for light nuclei • Dependence – strong up to ( ~-0.4 ) • Initial Energy Dependence – weak SPIN-Praha-2004

  18. Discussion and plan • Relativistic effects (MRS ?) x – t = 0. (one variable) -- Internal Mom. Hard Scattering Spectator SPIN-Praha-2004

  19. SPIN-Praha-2004

  20. SPIN-Praha-2004

  21. RIA + Exotics SPIN-Praha-2004

  22. K SPIN-Praha-2004

  23. Light-Front Dynamics (V.A.Karmanov) x – t = 0. { SPIN-Praha-2004

  24. Example L.S.Azhirei,N.P.Yudin,7thInt.Workshop,.p.159, Stara Lesna, Sloval Rep., (2003 ). Will be published in Yad.Fiz. SPIN-Praha-2004

  25. Spectator • Hard Scattering The second variable can be important at SPIN-Praha-2004

  26. Feature plans • Kaons SPIN-Praha-2004

  27. Nuclotron and Polarized Deuteron SPIN-Praha-2004

  28. Yu.S.Anisimov et al.,Part. And Nucl. Lett. No.1[118],p.68,2004 SPIN-Praha-2004

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