Event generator for jet tomography in electron-ion collisions

Author:

Ke Weiyao1234ORCID,Zhang Yuan-Yuan56ORCID,Xing Hongxi77,Wang Xin-Nian34ORCID

Affiliation:

1. Central China Normal University

2. Los Alamos National Laboratory

3. Lawrence-Berkeley National Laboratory

4. University of California

5. The Chinese University of Hong Kong

6. University of Science and Technology of China

7. South China Normal University

Abstract

We develop the first event generator, the electron-heavy-ion-jet-interaction-generator (eHIJING), for the jet tomography study of electron-ion collisions. In this generator, energetic jet partons produced from the initial hard scattering undergo multiple collisions with the nuclear target. The collision rate is proportional to the transverse-momentum-dependent (TMD) gluon density in the nucleus, which is given by a simple model inspired by the physics of gluon saturation. Medium-modified QCD splitting functions within the higher-twist (HT) and generalized higher-twist (GHT) frameworks are utilized to simulate parton showering in the nuclear medium that takes into account the non-Abelian Landau-Pomeranchuck-Midgal interference effect. Employing eHIJING, we revisit hadron production in semi-inclusive deep inelastic scattering (SIDIS) as measured by EMC, HERMES, and recent CLAS experiments. eHIJING with both GT and GHT frameworks gives reasonably good descriptions of these experimental data. Predictions for experiments at the future electron-ion colliders are also provided. It is demonstrated that future measurements of the transverse momentum broadening of single hadron spectra can be used to map out the two-dimensional kinematic (Q2, xB) dependence of the jet transport coefficient q^ in cold nuclear matter. Published by the American Physical Society 2024

Funder

Office of Energy Research and Development

High Energy Physics

Nuclear Physics

U.S. Department of Energy

National Science Foundation

National Natural Science Foundation of China

Basic and Applied Basic Research Foundation of Guangdong Province

Chinese University of Hong Kong

Shenzhen University

Laboratory Directed Research and Development

Los Alamos National Laboratory

National Nuclear Security Administration

Publisher

American Physical Society (APS)

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