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

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV University of Silesia, Katowice, Poland Jagiellonian University, Kraków, Poland KVI, Groningen, The Netherlands Kraków-Bochum Group EFT/ChPT Group Theory Support Hannover/Lisboa Group

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV Why 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 meaningful conclusions about the interaction models precise data in large phase space regions are needed

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV V ector and Tensor Polarization States 7 states:  Pz Pz  P zz P z max P zz max PzPz P zz +1/ / / / ΔE-E telescopes 3-plane MWPC  Angular range : θ = (12º, 38º), φ = (0º, 360º)

Elżbieta Stephan, University of Silesia, FB19, Bonn 2009 Beam polarization pp P z max =0, P zz max =+1 P z max =0, P zz max =-2 P z max =-2/3, P zz max =0 P z max =+2/3, P zz max =0 P z max =+1/3, P zz =-1 P z max =+1/3, P zz =+1 Elastic scattering cross section: iT 11, T 20, T 22 : measured at RIKEN, Eur. Phys. J. 31, 383 (2007)

Elżbieta Stephan, University of Silesia, FB19, Bonn 2009 Analyzing powers of elastic scattering 1 H(d,d)p 1 H(d,dp) COSY H. Mardanpour et al., Eur. Phys. J. 31, 383 (2007) H. Witała et al., Few-Body Systems 15, (1993) E. Stephan et al., Phys. Rev. C 76, (2007) K. Sekiguchi, Phys. Rev. C 70, (2004)

Elżbieta Stephan, University of Silesia, FB19, Bonn 2009 d + 1 H Measurement at 130 MeV T 20 for elastic scattering and breakup reaction

Elżbieta Stephan, University of Silesia, FB19, Bonn 2009 11 1 H(d,pp)n Measurement at 130 MeV Fit of analyzing powers

Elżbieta Stephan, University of Silesia, FB19, Bonn 2009 even observables: A y, A xx, A yy odd observables: A x, A xy; e.g.: Constrains on the breakup analyzing powers set by parity conservation

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV Breakup analyzing powers – fit with applies parity constrains

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV Analyzing Power Results – Summary Vector (A x, A y ) and tensor analyzing powers (A xx, A yy, A xy ) determined in the large part of the phase space Nearly 800 data points per observable ● θ 1, θ 2 = 15 o – 30 o ; grid 5 o ; Δθ = ±2 o ● φ 12 = 40 o – 180 o ; grid 20 o ; Δφ = ±10 o ● S [MeV] = 40 – 160; grid 4; ΔS = ±4  Statistical accuracy 0.01 – 0.05 (dominating uncertainty)  Systematic errors well under control Global comparisons with theory ( χ 2 test) non- negligible averaging

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

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV Analyzing Power Results - χ 2 tests l=1 for "even" l=0 for "odd"

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV Analyzing Power Results - χ 2 tests

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV Vector Analyzing Power Results

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV Tensor Analyzing Power Results Problem with TM99

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV Tensor Analyzing Power Results problem at low E rel ? not cured by inclusion of Coulomb!

Elżbieta Stephan, University of Silesia, FB19, Bonn 2009 Summary of analyzing power results: Large, precise basis for comparing description provided by various approaches Generally no big discrepancies between data and theoretical predictions Vector analyzing powers reveal very low sensitivity to 3NF Tensor analyzing powers: Coulomb effects are rather small, but not so strongly "localized" in particular ranges of phase space as in the case of cross section current model 3NF do not provide precise description of A xy in some regions (small discrepancies also for A xx and A yy ) – problems with spin part of 3NF? relativistic effects? doubtful... Furher developments in theories are very important! New data at different beam energies (e.g. 100 MeV) and covering still larger part of phase space are being analyzed

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

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

Elżbieta Stephan, University of Silesia, FB19, Bonn 2009 Investigations of 3N/4N continuum Summary  Rich set of high precision cross sections and analyzing powers data:  Data at E d = 130 MeV supplemented with results for forward proton angles ( )  Complete set for E d = 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 Studies of the possible sources of systematic effects: Determination of proton emmission angles Control over geometry - kinematics of the elastic scattering process. Phase of  – asymmetry distributions for elastic scattering, uncertainty below 0.5 o. 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 H(d,pp)n Measurement at 130 MeV Analyzing Power Results – T 20

Elżbieta Stephan, University of Silesia, FB19, Bonn H(d,pp)n Measurement at 130 MeV Coordinate system

Elżbieta Stephan, University of Silesia, FB19, Bonn 2009