ECCE unpolarized TMD measurements

TL;DR

This paper explores the feasibility of measuring unpolarized Transverse Momentum Dependent (TMD) distribution and fragmentation functions through SIDIS processes, focusing on cross sections and multiplicities related to hadron detection.

Contribution

It presents a feasibility study for unpolarized TMD measurements in SIDIS, including expected precision and systematic uncertainties for future experiments.

Findings

Estimated statistical precision for TMD measurements

Assessment of systematic uncertainties

Feasibility of extracting TMD functions from SIDIS data

Abstract

We performed feasibility studies for various measurements that are related to unpolarized TMD distribution and fragmentation functions. The processes studied include semi-inclusive Deep inelastic scattering (SIDIS) where single hadrons (pions and kaons) were detected in addition to the scattered DIS lepton. The single hadron cross sections and multiplicities were extracted as a function of the DIS variables $x$ and $Q^2$, as well as the semi-inclusive variables $z$, which corresponds to the momentum fraction the detected hadron carries relative to the struck parton and $P_T$, which corresponds to the transverse momentum of the detected hadron relative to the virtual photon. The expected statistical precision of such measurements is extrapolated to accumulated luminosities of 10 fb$^{-1}$ and potential systematic uncertainties are approximated given the deviations between true and reconstructed yields.