EEXICC: An event generator for doubly heavy baryon production at e+e- colliders
Abstract
We present EEXICC, a Monte Carlo event generator designed to simulate the production of doubly heavy baryons (Ξcc, Ξbc, and Ξbb) via e+e- annihilation. Based on nonrelativistic QCD effective theory, the generator calculates the process e++e−→ ΞQQ'+Q̅'+Q̅ using an improved trace technique at the amplitude level, which greatly improves numerical efficiency compared with traditional squared-amplitude methods. EEXICC uses a modular Fortran implementation for hard-process generation and a C++ interface to the bundled PYTHIA 8.317 library, enabling convenient integration into complete event simulation workflows. The program supports both weighted and unweighted event generation, and its numerical reliability has been verified against existing theoretical results. EEXICC provides a flexible and robust tool for studying the properties of doubly heavy baryons at future high-luminosity and high-energy e+e- colliders such as the CEPC and FCC-ee.
Versions
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BibTeX
@misc{li2026eexicc,
title = {{EEXICC: An event generator for doubly heavy baryon production at $e^+e^-$ colliders}},
author = {Hong-Tai Li and Xu-Chang Zheng and Xing-Gang Wu and Jiang Yan and Zhi Yang},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2605.10460},
eprint = {2605.10460},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.10460},
}
RIS
TY - UNPB
TI - EEXICC: An event generator for doubly heavy baryon production at e^+e^- colliders
AU - Hong-Tai Li
AU - Xu-Chang Zheng
AU - Xing-Gang Wu
AU - Jiang Yan
AU - Zhi Yang
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2605.10460
UR - https://arxiv.org/abs/2605.10460
AB - We present EEXICC, a Monte Carlo event generator designed to simulate the production of doubly heavy baryons (Ξ_cc, Ξ_bc, and Ξ_bb) via e^+e^- annihilation. Based on nonrelativistic QCD effective theory, the generator calculates the process e^++e^−→ Ξ_QQ'+Q̅'+Q̅ using an improved trace technique at the amplitude level, which greatly improves numerical efficiency compared with traditional squared-amplitude methods. EEXICC uses a modular Fortran implementation for hard-process generation and a C++ interface to the bundled PYTHIA 8.317 library, enabling convenient integration into complete event simulation workflows. The program supports both weighted and unweighted event generation, and its numerical reliability has been verified against existing theoretical results. EEXICC provides a flexible and robust tool for studying the properties of doubly heavy baryons at future high-luminosity and high-energy e^+e^- colliders such as the CEPC and FCC-ee.
ER -