Non-nucleon degrees of freedom in the deuteron from the d(\vec e,e'\vec p,)n break-up

TL;DR

This paper investigates how quark degrees of freedom influence proton polarizations in deuteron break-up, providing explanations for experimental data and predicting qualitative changes at high missing momentum.

Contribution

It introduces the role of quark degrees of freedom in deuteron polarization phenomena and predicts specific behavioral changes at high missing momentum.

Findings

Quark effects align with experimental polarization data.

Polarizations depend strongly on out-of-plane angles at high momentum.

A structure appears in polarizations around 200 MeV/c missing momentum.

Abstract

We analyzed contribution of quark degrees of freedom in the deuteron to the longitudinal, P_z', and transverse, P_x', polarizations of the proton in the d(\vec e,e'\vec p)n break-up. It is demonstrated that such effects work in correct direction to explain experimental data. We predict that the polarizations should change qualitatively behavior at p_m >200 MeV/c, (i) the polarizations become strongly dependent on the out-of-plain angle and (ii) there appears a structure in the both polarizations at p_m ~200 MeV/c.