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Analyzing Powers of the Deuteron-Proton Breakup in a Wide Phase Space Region

Analyzing Powers of the Deuteron-Proton Breakup in a Wide Phase Space Region . Elżbieta Stephan Institute of Physics University of Silesia Katowice, Poland. 1 H( d,pp )n Measurement at 130 MeV. University of Silesia, Katowice, Poland. Jagiellonian University, Kraków, Poland.

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Analyzing Powers of the Deuteron-Proton Breakup in a Wide Phase Space Region

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  1. Analyzing Powers of the Deuteron-Proton Breakup in a Wide Phase Space Region Elżbieta Stephan Institute of Physics University of Silesia Katowice, Poland

  2. 1H(d,pp)n Measurementat 130 MeV University of Silesia, Katowice, Poland Jagiellonian University, Kraków, Poland KVI, Groningen, The Netherlands Kraków-Bochum Group EFT/ChPT Group TheorySupport Hannover/Lisboa Group Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  3. 1H(d,pp)n Measurement at 130 MeVWhy Do We Measure Analyzing Powers? • A few times more additional data points (supplementing cross sections) • Potentially stronger sensitivity to small ingredients(sums of interfering amplitudes) • Small Coulomb effects - it can be easier to trace 3NF! • Data measured for elastic scattering process in the similar range of energies show that analyzing powers are more "troublesome" than cross section - problems with spin part of interaction? • In order to reach meaningfulconclusions about the interaction models precise data inlarge phase space regions are needed Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  4. 1H(d,pp)n Measurementat 130 MeVVector and Tensor PolarizationStates • 140 ΔE-E telescopes • 3-plane MWPC • Angular range : θ = (12º, 38º), φ = (0º, 360º) Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  5. Beam polarization Elastic scattering cross section: iT11, T20, T22 : measuredat RIKEN, Eur. Phys. J. 31, 383 (2007) Pzmax=0, Pzzmax=+1 Pzmax=0, Pzzmax=-2 Pzmax=-2/3, Pzzmax=0 Pzmax=+2/3, Pzzmax=0 Pzmax=+1/3, Pzz=-1 Pzmax=+1/3, Pzz=+1 p Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  6. Analyzingpowers of elasticscattering K. Sekiguchi, Phys. Rev. C 70, 014001 (2004) 1H(d,d)p 1H(d,dp) E. Stephan et al., Phys. Rev. C 76, 057001 (2007) GeWall @ COSY H. Mardanpour et al., Eur. Phys. J. 31, 383 (2007) H. Witała et al., Few-Body Systems 15, 67-85 (1993) Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  7. d + 1H Measurementat 130 MeVT20 for elasticscattering and breakupreaction Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  8. 1H(d,pp)n Measurementat 130 MeVFit of analyzingpowers 1 Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  9. Constrains on the breakup analyzing powers set by parity conservation evenobservables: Ay, Axx, Ayy oddobservables: Ax, Axy; e.g.: Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  10. 1H(d,pp)n Measurementat 130 MeVBreakupanalyzingpowers – fit withappliesparityconstrains Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  11. 1H(d,pp)n Measurementat 130 MeVAnalyzing Power Results – Summary • Vector (Ax, Ay) and tensor analyzingpowers (Axx, Ayy, Axy) determinedinthelarge part of thephasespace • Nearly 800 data points per observable • θ1, θ2 = 15o – 30o; grid 5o ; Δθ =±2o • φ12 = 40o – 180o; grid 20o ; Δφ =±10o • S [MeV] = 40 – 160; grid 4; ΔS = ±4 • Statisticalaccuracy 0.01 – 0.05 (dominatinguncertainty) • Systematicerrorswell under control • Global comparisonswiththeory (χ2 test) non- negligible averaging Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  12. Tensor Analyzing Power Results configurations with predicted 3NF effects Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  13. 1H(d,pp)n Measurement at 130 MeVAnalyzing Power Results - χ2tests l=1 for "even" l=0 for "odd" Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  14. 1H(d,pp)n Measurementat 130 MeVAnalyzing Power Results - χ2tests Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  15. 1H(d,pp)n Measurement at 130 MeVVector Analyzing Power Results Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  16. 1H(d,pp)n Measurement at 130 MeVTensor Analyzing Power Results Problem with TM99 Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  17. 1H(d,pp)n Measurementat 130 MeVTensor Analyzing Power Results problem atlowErel ? not cured by inclusion of Coulomb! Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  18. Summary of analyzingpowerresults: • Large, precisebasis for comparingdescriptionprovided by variousapproaches • Generallyno big discrepanciesbetween data and theoreticalpredictions • Vectoranalyzingpowersrevealverylowsensitivity to 3NF • Tensor analyzingpowers: • Coulomb effectsarerathersmall, but not so strongly "localized" inparticularranges of phasespace as inthecase of cross section • currentmodel 3NF do not provideprecisedescription of Axyinsomeregions (smalldiscrepanciesalso for Axx and Ayy) –problemswith spin part of 3NF? • relativisticeffects? doubtful... • Furherdevelopmentsintheoriesareveryimportant! • New data atdifferentbeamenergies (e.g. 100 MeV) and coveringstilllarger part of phasespacearebeinganalyzed Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  19. Thank you for your attention! Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  20. BINA detection system at KVI BINA Detector Phoswich Ball ΔE Wall Stopping (E) Wall MWPC Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  21. Investigations of 3N/4N continuumSummary • Rich set of high precision cross sections and analyzing powers data: • Data atEd = 130 MeV supplemented with results for forward proton angles (GeWall@COSY) • Complete set for Ed = 100 MeV (BINA) • Measurements for pd systems at 180 and 135 MeV (BINA) • Developments in theoretical calculations for 3N system (3N force, Coulomb interaction, relativistic effects, higher order in ChPT …) • Studies of breakup processes in dd system (BINA) at 130 MeV Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  22. Studies of the possible sources of systematic effects: • Determination of proton emmission angles • Control over geometry - kinematics of the elastic scattering process. • Phase of j – asymmetry distributions for elastic scattering, uncertainty below 0.5o. • Uncertainty of polarization determination • well under control, systematic error of about 3 %. • General consistency of the data – • do they fulfill constrains of parity conservation? Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  23. 1H(d,pp)n Measurementat 130 MeVAnalyzing Power Results – T20 Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  24. 1H(d,pp)n Measurementat 130 MeVCoordinate system Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

  25. Elżbieta Stephan, University of Silesia, FB19, Bonn 2009

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