Detecting photons in radiative Bhabha interaction with Si-strip and LYSO crystals at future e+e- colliders
Abstract
Next-generation e+e-colliders have been proposed for the Super Tau Charm Facility covering center-of-mass energies sqrt(s) = 2-7 GeV, and for the Higgs Factories optimized for Z-pole physics and for HZ production. Luminosity can be determined by measuring forward Bhabha scattering. The QED cross-section calculation has reached a precision of better than 10^-3. Detecting radiative photons in Bhabha events provides a tool for validating higher-order corrections in theory. We propose the Forward Detector for detecting Bhabha scattering events at the STCF. The design uses high-resolution silicon detectors and finely segmented LYSO crystals to discriminate radiative photons from closely associated electrons. Bhabha scattering events are simulated with the BHLUMI and BHWIDE programs, and the detector is modeled using GEANT. Systematic uncertainties due to multiple scattering and bremsstrahlung in the beam pipe were evaluated. The potential for achieving precise measurements of radiative processes in Bhabha events is investigated.
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BibTeX
@misc{bao2026detecting,
title = {{Detecting photons in radiative Bhabha interaction with Si-strip and LYSO crystals at future e+e- colliders}},
author = {Chentao Bao and Hai Chen and Wang Chen and Zhujun Fang and Jiading Gong and Suen Hou and Xiaolin Kang and Mingyi Liu and Ming Qi and Liqing Qin and Weimin Song and Jie Wang and Yadi Wang and Lei Zhang and Linghua Zhang},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.15036},
eprint = {2610.15036},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.15036},
note = {CC0},
}
RIS
TY - UNPB
TI - Detecting photons in radiative Bhabha interaction with Si-strip and LYSO crystals at future e+e- colliders
AU - Chentao Bao
AU - Hai Chen
AU - Wang Chen
AU - Zhujun Fang
AU - Jiading Gong
AU - Suen Hou
AU - Xiaolin Kang
AU - Mingyi Liu
AU - Ming Qi
AU - Liqing Qin
AU - Weimin Song
AU - Jie Wang
AU - Yadi Wang
AU - Lei Zhang
AU - Linghua Zhang
PY - 2026
DA - 2026/10/10
PB - arXiv
DO - 10.48550/arxiv.2610.15036
UR - https://arxiv.org/abs/2610.15036
AB - Next-generation e+e-colliders have been proposed for the Super Tau Charm Facility covering center-of-mass energies sqrt(s) = 2-7 GeV, and for the Higgs Factories optimized for Z-pole physics and for HZ production. Luminosity can be determined by measuring forward Bhabha scattering. The QED cross-section calculation has reached a precision of better than 10^-3. Detecting radiative photons in Bhabha events provides a tool for validating higher-order corrections in theory. We propose the Forward Detector for detecting Bhabha scattering events at the STCF. The design uses high-resolution silicon detectors and finely segmented LYSO crystals to discriminate radiative photons from closely associated electrons. Bhabha scattering events are simulated with the BHLUMI and BHWIDE programs, and the detector is modeled using GEANT. Systematic uncertainties due to multiple scattering and bremsstrahlung in the beam pipe were evaluated. The potential for achieving precise measurements of radiative processes in Bhabha events is investigated.
ER -