Prompt photoproduction within the non-relativistic QCD framework at the CEPC

Xi-Jie Zhan; Jian-Xiong Wang

doi:10.1140/epjc/s10052-020-8276-0

EPJ

Prompt $Mathematical equation: $$J/\psi $$$ photoproduction within the non-relativistic QCD framework at the CEPC

Xi-Jie Zhan¹^,2^* and Jian-Xiong Wang¹^,2

¹ Institute of High Energy Physics (IHEP), Chinese Academy of Sciences (CAS), 19B Yuquan Road, Shijingshan District, Beijing, 100049, China
² University of Chinese Academy of Sciences (UCAS), Chinese Academy of Sciences (CAS), 19(A) Yuquanlu Road, Shijingshan District, Beijing, 100049, China

^* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Received: 18 May 2020
Accepted: 21 July 2020
Published online: 13 August 2020

Abstract

The prompt $Mathematical equation: $$J/\psi $$$ photoproduction within the non-relativistic QCD (NRQCD) framework at the future Circular Electron Positron Collider (CEPC) is studied, including the contributions from both direct and resolved photons. Employing different sets of long distance matrix elements, the total cross section is dominated by the color-octet channel. We present different kinematic distributions of $Mathematical equation: $$J/\psi $$$ production and the results show there will be about 50 $Mathematical equation: $$J/\psi $$$ events when the transverse momentum of $Mathematical equation: $$J/\psi $$$ is up to 20 GeV. It renders that the $Mathematical equation: $$J/\psi $$$ photoprodution at the CEPC is a well laboratory to test the NRQCD and further clarify the universality problem in NRQCD between electron positron collider and hadron collider.

International School of Cosmic Ray Astrophysics
24th Course: “Particles and the Cosmos”
29 July – 6 August 2026
Erice, Italy

EPJ

Prompt photoproduction within the non-relativistic QCD framework at the CEPC

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Prompt $Mathematical equation: $$J/\psi $$$ photoproduction within the non-relativistic QCD framework at the CEPC