Phase shift analysis of hyperon-nucleon elastic scattering using optimized polynomial expansion techniques |
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Authors: | S Mohanty J K Mohapatra B B Deo |
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Affiliation: | (1) Department of Physics, Utkal University, 751 004 Bhubaneswar, India;(2) Department of Physics, Regional College of Education, 751 007 Bhubaneswar, India |
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Abstract: | A relatively stable method of phase shift analysis of hyperon-nucleon scattering proposed by us is applied to Σ+ p and Λp scattering. The analytic cutt-planes of analyticity of the helicity amplitudes are mapped into the interior of unifocal ellipses. The helicity amplitudes are then expressed as accelerated convergent expansions in the mapped variable. A definite economy is observed in the number of free parameters for fixed energy phase shift analysis of Σ+ p and Λp scattering at 40 and 100 MeV and 100 MeV respectively. Twenty six more phase shifts and coupling parameters corresponding to higherJ values are also predicted. |
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Keywords: | Hyperon nucleon elastic scattering helicity amplitudes polynomial expansion technique phase shifts coupling parameters |
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