Theoretical Study of Spin Observables in $pd$ Elastic Scattering at Energies $T_p = 800-1000$ MeV

TL;DR

This paper uses a refined Glauber model to analyze spin observables in proton-deuteron elastic scattering at 800-1000 MeV, comparing predictions with experimental data and discussing discrepancies.

Contribution

It introduces a detailed theoretical analysis of spin observables in $pd$ scattering using updated $NN$ amplitudes and accounts for deuteron structure and charge-exchange effects.

Findings

Reasonable agreement at low momentum transfer $|t| \\lesssim 0.2$ (GeV/$c)^2$

Moderate discrepancies likely due to input $NN$ amplitude uncertainties

Qualitative agreement at higher $|t|$, except for certain tensor observables

Abstract

Various spin observables (analyzing powers and spin-correlation parameters) in $pd$ elastic scattering at $T_p = 800-1000$ MeV are analyzed within the framework of the refined Glauber model. The theoretical model uses as input spin-dependent $NN$ amplitudes obtained from the most recent partial-wave analysis and also takes into account the deuteron $D$ wave and charge-exchange effects. Predictions of the refined Glauber model are compared with the existing experimental data. Reasonable agreement between the theoretical calculations and experimental data at low momentum transfers $|t| \lesssim 0.2$ (GeV/$c)^2$ is found for all observables considered. Moderate discrepancies found in this region are shown to be likely due to uncertainties in the input $NN$ amplitudes. Qualitative agreement at higher momentum transfers is also found for most observables except the tensor ones with mixed $x$ and $z$ polarization components. Possible reasons for observed deviations of the model calculations from the data at $|t| > 0.2$ (GeV/$c)^2$ are discussed.