Abstract
We propose a new measurement of the heavy flavor hadron double spin asymmetry in deep-inelastic scattering at a future Electron-Ion Collider (EIC) to constrain the polarized gluon distribution function inside the proton. Statistical projection on $D^0$ meson double spin asymmetry is calculated with an EIC central detector using an all-silicon tracker and vertexing subsystem. A first impact study was done by interpreting pseudo-data at next-to-leading order in QCD. The sensitivity of the experimental observable in constraining gluon helicity distribution in a wide range of parton momentum fraction $x$ has been investigated considering different beam energy configurations. This measurement complements the inclusive spin-dependent structure function measurement and provides an opportunity to constrain the gluon helicity distribution in the moderate $x$ region.
Highlights
The spin structure of the nucleon has been of fundamental interest in modern hadronic physics ever since the EMC spin puzzle [1]
Where ΔΣðxÞ and ΔgðxÞ denote the nonperturbativepolarized parton distribution functions (PDFs) for the quark singlet and gluons, Lq and Lg are the orbital angular momenta of quarks and gluons, and x is the momentum fraction carried by the quarks or gluons
We have proposed a new measurement on longitudinal double spin asymmetries in the e⃗ þ p⃗ → e0 þ D0 þ X deep-inelastic scattering (DIS)
Summary
The spin structure of the nucleon has been of fundamental interest in modern hadronic physics ever since the EMC spin puzzle [1]. In this paper we provide a systematic study of charm quark production to constrain the polarized gluon distribution in a wide range of x at the future EIC. Compared to the inclusive DIS measurements, the polarized charm structure function provides direct access to the ΔgðxÞ from leading order. The next-to-leading order perturbative QCD formalism for heavy flavor production in polarized DIS has been derived [16] This will help to achieve high precision from theory side in constraining ΔgðxÞ from the experiments. An all-silicon tracker conceptual design has been applied and studied in various EIC simulations [17,18] It plays an essential role in our analysis of this paper, since it enables high precision measurement of heavy flavor hadrons through their hadronic decay channels
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
