Cross sections and tensor analyzing powers A{sub yy} of the reaction {sup 1}H(d-vector, pp)n in 'symmetric constant relative energy' geometries at E{sub d}=19 MeV
- Institut fuer Kernphysik, Universitaet zu Koeln, Zuelpicher Strasse 77, D-50937 Cologne (Germany)
We measured the cross sections and tensor analyzing powers of the {sup 1}H(d-vector,pp)n breakup reaction at E{sub d}=19 MeV in four symmetric constant relative energy (SCRE) configurations. The data are compared with theoretical predictions from four different approaches: the first based on high-precision (semi)phenomenological potentials alone or, the second, combined with model three-nucleon forces, and the third based on chiral forces up to next-to-next-to-leading order (NNLO) in the chiral expansion. In these cases the Coulomb interaction is not included. In addition, a fourth approach consists in a comparison with predictions based on CD Bonn including the {delta} excitation and the Coulomb force. In all cases the measured cross sections are significantly below the theoretical values, whereas the magnitudes of the tensor analyzing powers agree within the error bars in three of the four cases. The apparent discrepancies in the breakup cross sections are similar to the known differences for the space-star breakup. This adds to the data base of unsolved low-energy discrepancies (puzzles)
- OSTI ID:
- 20771573
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 73, Issue 6; Other Information: DOI: 10.1103/PhysRevC.73.064001; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Measurement of the A sub yy tensor analyzing power for the sup 1 H(d sup yields ,pp)n reaction in the symmetric constant relative energy geometry
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Related Subjects
ACCURACY
BREAKUP REACTIONS
CHIRALITY
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DEUTERON BEAMS
DEUTERON REACTIONS
EXCITATION
GEOMETRY
HYDROGEN 1 TARGET
MEV RANGE
NEUTRONS
NUCLEAR FORCES
NUCLEAR POTENTIAL
POLARIZATION
POLARIZATION-ASYMMETRY RATIO
POLARIZED BEAMS
PROTONS
SCATTERING