Prospects for exploring quantum-correlated neutral DD̅ decays at STCF
Abstract
We investigate the prospects for determining charm mixing, indirect C P violation and hadronic parameters in charm decays with quantum-correlated neutral charm mesons at the proposed Super Tau-Charm Facility. The study is based on time-integrated double tag rates of coherent DD̅ pairs produced at √s=3.773 and $4.030$ GeV, from e+e−→ D(*)D̅(*) processes. Here, one D is tagged with the quasi flavour-specific decays D→ K-π+π+π-, K-π+π0, and K-π+, while the other D̅ is detected with the final states in flavour-specific mode, C P eigenstate mode, or self-conjugate mode. The expected sensitivities are evaluated assuming an integrated luminosity of 1 ab−1 at each energy point, demonstrating the capability on precise determination of the charm mixing parameters, the indirect C P violation parameters, the strong-phase differences, and the coherence factors. The constraints of the hadronic-parameters provide unique inputs to the CKM angle γ fit, while the measurements of charm mixing and indirect C P violation parameters are complementary to the time-dependent measurements in the Belle II and LHCb experiments.
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BibTeX
@misc{wang2026prospects,
title = {{Prospects for exploring quantum-correlated neutral $D\overlineD$ decays at STCF}},
author = {Ying-Hao Wang and Yi-Feng Wu and Pei-Rong Li and Yu Zhang and Xiao-Rui Lyu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.36529},
eprint = {2610.36529},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.36529},
}
RIS
TY - UNPB
TI - Prospects for exploring quantum-correlated neutral DD̅ decays at STCF
AU - Ying-Hao Wang
AU - Yi-Feng Wu
AU - Pei-Rong Li
AU - Yu Zhang
AU - Xiao-Rui Lyu
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2610.36529
UR - https://arxiv.org/abs/2610.36529
AB - We investigate the prospects for determining charm mixing, indirect C P violation and hadronic parameters in charm decays with quantum-correlated neutral charm mesons at the proposed Super Tau-Charm Facility. The study is based on time-integrated double tag rates of coherent DD̅ pairs produced at √s=3.773 and $4.030$ GeV, from e^+e^−→ D^(*)D̅^(*) processes. Here, one D is tagged with the quasi flavour-specific decays D→ K^-π^+π^+π^-, K^-π^+π^0, and K^-π^+, while the other D̅ is detected with the final states in flavour-specific mode, C P eigenstate mode, or self-conjugate mode. The expected sensitivities are evaluated assuming an integrated luminosity of 1 ab^−1 at each energy point, demonstrating the capability on precise determination of the charm mixing parameters, the indirect C P violation parameters, the strong-phase differences, and the coherence factors. The constraints of the hadronic-parameters provide unique inputs to the CKM angle γ fit, while the measurements of charm mixing and indirect C P violation parameters are complementary to the time-dependent measurements in the Belle II and LHCb experiments.
ER -