Longitudinal target polarization dependence of anti-Lambda polarization and polarized strangeness PDFs

TL;DR

This paper investigates how the polarization of anti-Lambda particles produced in polarized lepton deep inelastic scattering can reveal information about the polarized and unpolarized anti-strangeness distribution functions within nucleons, using both simple models and string fragmentation simulations.

Contribution

It introduces a combined approach using factorized fragmentation functions and string fragmentation models to analyze anti-Lambda polarization dependence on target polarization.

Findings

Anti-Lambda polarization depends on target polarization.

Measurement can distinguish polarized from unpolarized anti-strangeness distributions.

The approach provides a new method to probe nucleon strangeness content.

Abstract

The longitudinal polarization of anti-Lambda produced in the currant fragmentation region of polarized lepton DIS off polarized and unpolarized target is described both in the simple formalism with factorized fragmentation functions as well as within intrinsic strangeness model using string fragmentation implemented into event generator LEPTO. It is demonstrated that the the measurement of anti-Lambda polarization and its dependence on the target polarization can serve as a filter for (un)polarized anti-strangeness distribution function of nucleon.