Tracing the evolution of nuclear excitation at the future Electron-Ion Collider
Year: 2025
Type: article
Abstract: The evolution of nuclear excitation in electron-gold ( e + Au ) collisions at the forthcoming Electron-Ion Collider (EIC) is investigated using the event generator. The EIC's collider kinematics and detector-motivated rapidity selections enable a clear separation, in the laboratory frame, of the dominant reaction stages: hard scattering, intranuclear cascade (INC), and nuclear deexcitation. A systematic study of the event-by-event mean transverse momentum fluctuation observable κ reveals strong sensitivity to the intranuclear-cascade formation time and to nuclear geometry, with only weak dependence on the electron-beam energy. These findings indicate that κ can serve as an exploratory diagnostic for disentangling the cascade and deexcitation stages of nuclear excitation at the EIC. The pronounced sensitivity observed within the framework underscores the model dependence of the present results while at the same time motivating systematic cross-model investigations to establish the broader applicability of κ . The results yield stage-resolved, testable predictions for early EIC measurements.
Source: Physical Review C
DOI: 10.1103/kqf6-xczd
Author: Niseem Magdy
Institutions: Brookhaven National Laboratory, Texas Southern University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4417212730