Pion-nucleus optical potential: The pion-absorption contribution |
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Authors: | S C Phatak |
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Institution: | (1) Institute of Physics, Sachivalaya Marg, 751 005 Bhubaneswar, Indian |
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Abstract: | The real and imaginary parts of pion-nucleus optical potential arising from pion absorption channel have been computed. A
two-nucleon model of pion absorption which includesπ andρ rescattering andS-wave interaction has been used. The effects of short-range nucleon-nucleon correlations, Pauli blocking and formfactors have
been included. The threshold values of imaginary absorption potential are reasonably close to density-squared terms of phenomenological
potentials. The real part ofP-wave potential is attractive and that ofS-wave potential is weakly attractive at lower pion energies and changes sign as pion energy is increased. The calculation
shows that the real part of absorption is significantly affected by short-range correlations and Pauli-blocking. |
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Keywords: | Pion optical potential pion absorption |
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