Probing gluon helicity with heavy flavor at the Electron-Ion Collider

Open Access

Probing gluon helicity with heavy flavor at the Electron-Ion Collider

Daniele Paolo Anderle, Xin Dong, Felix Hekhorn, Matthew Kelsey, Sooraj Radhakrishnan, Ernst Sichtermann, Lei Xia, Hongxi Xing, Feng Yuan, and Yuxiang Zhao

Phys. Rev. D 104, 114039 – Published 29 December 2021

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 pseudodata 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 collision energies. 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.

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Received 31 August 2021
Accepted 14 December 2021

DOI:https://doi.org/10.1103/PhysRevD.104.114039

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear structure & decays

Nuclear Physics

Authors & Affiliations

Daniele Paolo Anderle^1,2,3,*, Xin Dong⁴, Felix Hekhorn ^5,†, Matthew Kelsey^6,4, Sooraj Radhakrishnan^7,4, Ernst Sichtermann ⁴, Lei Xia ⁸, Hongxi Xing¹, Feng Yuan⁴, and Yuxiang Zhao^9,10,11,‡

¹Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou 510006, China
²Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Southern Nuclear Science Computing Center, South China Normal University, Guangzhou 510006, China
³Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
⁴Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
⁵Tif Lab, Dipartimento di Fisica, Università di Milano and INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, Italy
⁶Wayne State University, Detroit, Michigan 48202, USA
⁷Kent State University, Kent, Ohio 44242, USA
⁸University of Science and Technology of China, Hefei, Anhui Province 230026, China
⁹Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu Province 730000, China
¹⁰University of Chinese Academy of Sciences, Beijing 100049, China
¹¹Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China

^*dpa@m.scnu.edu.cn
^†felix.hekhorn@unimi.it
^‡yxzhao@impcas.ac.cn

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Issue

Vol. 104, Iss. 11 — 1 December 2021

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