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- W2002136136 abstract "Recently, a pseudoscalar-vector-meson ($mathrm{PV}$) model for elastic nucleon-nucleon scattering was presented by Barker and Haracz in which phase parameters are defined by a perturbative method which is similar to the geometric unitarization scheme used in other models. These phase parameters are dominated by the two-pion-exchange (TPE) contribution for the low values of $L$, and TPE is unreasonably large for the phases associated with the $S$ state. In order to suppress this large contribution, relativistic Heitler damping or $K$-matrix unitarization is applied to the $mathrm{PV}$ model. It is found that the low-partial-wave phase parameters $^{1}K_{0}$, $^{3}{ensuremath{theta}}^{S}_{1}$, $^{3}{ensuremath{theta}}^{D}_{1}$, and ${ensuremath{rho}}_{1}$ are drastically reduced and made much more reasonable by damping. Moreover, the $P$-and $D$-state phase shifts are reduced by as much as 20% at the higher scattering energies. The resulting damped phase parameters are in good agreement with the phenomenological values for $Lensuremath{ge}2$ and energies up to 200 MeV, excluding $^{3}{ensuremath{theta}}^{D}_{1}$. Coupling constants more consistent with experiment are used contrasting with our previous usage. It is also found that the presence of a strongly coupled scalar $ensuremath{epsilon}$ resonance does not improve this model." @default.
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- W2002136136 title "Damped Pseudoscalar- and Vector-Meson Model for Nucleon-Nucleon Scattering" @default.
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- W2002136136 doi "https://doi.org/10.1103/physrevd.6.1373" @default.
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