TY - JOUR
T1 - Relativistic predictions of quasielastic proton-nucleus spin observables based on a complete Lorentz invariant representation of the [Formula Presented] scattering matrix
AU - van der Ventel, B. I.S.
AU - Hillhouse, G. C.
AU - De Kock, P. R.
PY - 2000
Y1 - 2000
N2 - Within the framework of the relativistic plane wave impulse approximation (RPWIA), complete sets of quasielastic [Formula Presented] and [Formula Presented] spin observables are calculated employing a general and complete Lorentz invariant representation of the [Formula Presented] scattering matrix (referred to as the IA2 representation). The use of a complete representation eliminates the arbitrariness of a previously used five-term parametrization (commonly called the IA1 representation) and allows for the correct incorporation of effective-mass-type medium effects within the RPWIA framework and within the context of the Walecka model. For quasielastic scattering from a [Formula Presented] target at incident proton energies between 200 and 500 MeV, we investigate the sensitivity of complete sets of spin observables to effective nucleon masses for both IA1 and IA2 representations. In general it is seen that the IA1 representation may overestimate the importance of nuclear medium effects, whereas the IA2-based predictions nearly correspond to values for free nucleon-nucleon scattering.
AB - Within the framework of the relativistic plane wave impulse approximation (RPWIA), complete sets of quasielastic [Formula Presented] and [Formula Presented] spin observables are calculated employing a general and complete Lorentz invariant representation of the [Formula Presented] scattering matrix (referred to as the IA2 representation). The use of a complete representation eliminates the arbitrariness of a previously used five-term parametrization (commonly called the IA1 representation) and allows for the correct incorporation of effective-mass-type medium effects within the RPWIA framework and within the context of the Walecka model. For quasielastic scattering from a [Formula Presented] target at incident proton energies between 200 and 500 MeV, we investigate the sensitivity of complete sets of spin observables to effective nucleon masses for both IA1 and IA2 representations. In general it is seen that the IA1 representation may overestimate the importance of nuclear medium effects, whereas the IA2-based predictions nearly correspond to values for free nucleon-nucleon scattering.
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U2 - 10.1103/PhysRevC.62.024609
DO - 10.1103/PhysRevC.62.024609
M3 - Article
AN - SCOPUS:85035305171
VL - 62
SP - 6
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 2
ER -