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- Title
Determining the helicity structure of the nucleon at the Electron Ion Collider in China.
- Authors
Anderle, Daniele Paolo; Hou, Tie-Jiun; Xing, Hongxi; Yan, Mengshi; Yuan, C.-P.; Zhao, Yuxiang
- Abstract
Understanding how sea quarks behave inside a nucleon is one of the most important physics goals of the proposed Electron-Ion Collider in China (EicC), which is designed to have a 3.5 GeV polarized electron beam (80% polarization) colliding with a 20 GeV polarized proton beam (70% polarization) at instantaneous luminosity of 2 × 1033cm−2s−1. A specific topic at EicC is to understand the polarization of individual quarks inside a longitudinally polarized nucleon. The potential of various future EicC data, including the inclusive and semi-inclusive deep inelastic scattering data from both doubly polarized electron-proton and electron-3He collisions, to reduce the uncertainties of parton helicity distributions is explored at the next-to-leading order in QCD, using the Error PDF Updating Method Package (ePump) which is based on the Hessian profiling method. We show that the semi-inclusive data are well able to provide good separation between flavour distributions, and to constrain their uncertainties in the x > 0.005 region, especially when electron-3He collisions, acting as effective electron-neutron collisions, are taken into account. To enable this study, we have generated a Hessian representation of the DSSV14 set of PDF replicas, named DSSV14H PDFs.
- Subjects
CHINA; PARTONS; DEEP inelastic collisions; PARTICLES (Nuclear physics); INELASTIC scattering; ELECTRON beams; PROTON beams; ELECTRONS
- Publication
Journal of High Energy Physics, 2021, Vol 2021, Issue 8, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP08(2021)034