Charge-Exchange Reactions Accompanied by a Single π+ Production in Medium-Energy Heavy-Ion Collisions
Abstract
Heavy-ion charge-exchange (CE) reactions provide a sensitive probe of isospin dynamics in nuclear collisions. We investigate the reaction 12C(12C, 12N π+) 12Be at 400--600 A MeV within the ultra-relativistic quantum molecular dynamics model combined with a phase-space coalescence approach. This reaction represents a nontrivial CE channel accompanied by a single π+ production in heavy-ion collisions, extending previous studies from lepton-induced to hadronic systems. The 12N fragment is formed via nucleon and meson exchange, whereas π+ production is primarily governed by Δ resonance excitation and decay, enabling simultaneous investigations of CE processes and Δ-induced pion production within the same reaction system. We calculate the reaction cross section and analyze the four-momentum distributions of 12N and π+. Characteristic phase-space features reflect different production mechanisms and provide guidance for future experimental designs. Additionally, this reaction may serve as a potential pathway for rare-isotope production.
Versions
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BibTeX
@misc{chen2026chargeexchange,
title = {{Charge-Exchange Reactions Accompanied by a Single $π^+$ Production in Medium-Energy Heavy-Ion Collisions}},
author = {Xiao-lei Chen and Jin-yu Yang and Shi-kang Dong and Bao-wei Ding and Bi-tao Hu and Xi-yu Qiu},
howpublished = {arXiv},
year = {2026},
month = jul,
doi = {10.48550/arxiv.2607.19924},
eprint = {2607.19924},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.19924},
}
RIS
TY - UNPB
TI - Charge-Exchange Reactions Accompanied by a Single π^+ Production in Medium-Energy Heavy-Ion Collisions
AU - Xiao-lei Chen
AU - Jin-yu Yang
AU - Shi-kang Dong
AU - Bao-wei Ding
AU - Bi-tao Hu
AU - Xi-yu Qiu
PY - 2026
DA - 2026/07/22
PB - arXiv
DO - 10.48550/arxiv.2607.19924
UR - https://arxiv.org/abs/2607.19924
AB - Heavy-ion charge-exchange (CE) reactions provide a sensitive probe of isospin dynamics in nuclear collisions. We investigate the reaction ^12C(^12C, ^12N π^+) ^12Be at 400--600 A MeV within the ultra-relativistic quantum molecular dynamics model combined with a phase-space coalescence approach. This reaction represents a nontrivial CE channel accompanied by a single π^+ production in heavy-ion collisions, extending previous studies from lepton-induced to hadronic systems. The ^12N fragment is formed via nucleon and meson exchange, whereas π^+ production is primarily governed by Δ resonance excitation and decay, enabling simultaneous investigations of CE processes and Δ-induced pion production within the same reaction system. We calculate the reaction cross section and analyze the four-momentum distributions of ^12N and π^+. Characteristic phase-space features reflect different production mechanisms and provide guidance for future experimental designs. Additionally, this reaction may serve as a potential pathway for rare-isotope production.
ER -