Transversity from two pion interference fragmentation
Jun She, Yang Huang, Vincenzo Barone, Bo-Qiang Ma
TL;DR
This paper calculates azimuthal spin asymmetries in pion pair production during SIDIS at HERMES and COMPASS, exploring how different models of transversity affect the results and potential insights from neutron targets.
Contribution
It introduces a comparative analysis of transversity models using interference fragmentation functions in SIDIS for various targets.
Findings
Proton target results are insensitive to transversity models.
Neutron target predictions vary significantly between models.
Neutron measurements can provide valuable transversity information.
Abstract
We present calculation on the azimuthal spin asymmetries for pion pair production in semi-inclusive deep inelastic scattering (SIDIS) process at both HERMES and COMPASS kinematics, with transversely polarized proton, deuteron and neutron targets. We calculate the asymmetry by adopting a set of parametrization of the interference fragmentation functions and two different models for the transversity. We find that the result for the proton target is insensitive to the approaches of the transversity but more helpful to understand the interference fragmentation functions. However, for the neutron target, which can be obtained through using deuteron and {He} targets, we find different predictions for different approaches to the transversity. Thus probing the two pion interference fragmentation from the neutron can provide us more interesting information on the transversity.
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