Lambda polarization at Electron-ion collider in China

TL;DR

This paper explores Lambda polarization measurements at the proposed Electron-ion collider in China, focusing on Lambda reconstruction and theoretical predictions of transverse polarization to enhance understanding of spin effects in high-energy nuclear physics.

Contribution

It provides the first detailed study of Lambda production and polarization predictions at EicC, including detector performance and future research potential.

Findings

Lambda can be reconstructed effectively at EicC

Theoretical predictions for transverse polarization are feasible

EicC can significantly advance spin physics studies

Abstract

Lambda polarization can be measured through its self-analyzing weak decay, making it an ideal candidate for studying spin effects in high energy scatterings. In lepton-nucleon deeply inelastic scatterings (DIS), Lambda polarization measurements can probe the polarized parton distribution functions (PDFs) and the polarized fragmentation functions (FFs). One of the most promising facilities for high-energy nuclear physics research is the proposed Electron-ion collider in China (EicC). As a next-generation facility, EicC is set to propel our understandings of nuclear physics to new heights. In this article, we study the Lambda production in electron-proton collision at EicC energy, in particular Lambda's reconstruction based on the performance of the designed EicC detector. In addition, taking spontaneous transverse polarization as an example, we provide a theoretical prediction with statistical projection based on one month of EicC data taking, offering valuable insights into future research prospects.