Partial reconstruction of the decay Bs0→ ϕ(K+K−)η' (π+π−η) at a future high-luminosity Z factory
Abstract
The decay Bs0 → ϕ(K+K-)η'(π+π-η) is of particular interest in flavour physics because in the Standard Model it proceeds predominantly through the quark transition b̅ → s̅ss̅. However, the reconstruction of this decay is experimentally challenging due to the presence of the neutral η particle, which significantly reduces the overall reconstruction efficiency. In this study, the feasibility of using the partial reconstruction technique to reconstruct the invariant mass of the Bs0 meson without explicitly detecting the η particle is investigated. Monte Carlo simulated events corresponding to an FCC-ee environment are used, and the effects of detector momentum and vertex resolutions on the reconstruction performance are examined. The results show that improved vertex resolution substantially improves the global reconstructed mass response and partial-reconstruction efficiency, while improvements in momentum resolution are manifested primarily through a narrowing of the fitted central DCB component. These findings suggest that future high-luminosity e+e- colliders such as FCC-ee could effectively exploit the partial reconstruction technique to study rare decay modes containing undetected neutral particles.
Related
- FCC-μe: High Energy, High Luminosity Muon-Electron Collider & Neutrino Factory at CERN
- Boson Star Factory: Past, Present, and Future
- Forward decay chain reconstruction with displaced vertices in intense magnetic fields
- Slow-spectrum preshaping for reservoir computing: Attractor reconstruction in attracting submanifolds under partial observation
- Partial geometrization of dark matter in metric f(R) gravity: Exact reconstruction and growth constraints
BibTeX
@misc{juevesano2026partial,
title = {{Partial reconstruction of the decay $B_s^0\rightarrow ϕ(K^+K^-)η' (π^+π^-η)$ at a future high-luminosity Z factory}},
author = {Jeremiah D. Juevesano and Marlon P. Brade and Dennis C. Arogancia and Jan Mickelle V. Maratas},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.27996},
eprint = {2610.27996},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.27996},
}
RIS
TY - UNPB
TI - Partial reconstruction of the decay B_s^0→ ϕ(K^+K^−)η' (π^+π^−η) at a future high-luminosity Z factory
AU - Jeremiah D. Juevesano
AU - Marlon P. Brade
AU - Dennis C. Arogancia
AU - Jan Mickelle V. Maratas
PY - 2026
DA - 2026/10/28
PB - arXiv
DO - 10.48550/arxiv.2610.27996
UR - https://arxiv.org/abs/2610.27996
AB - The decay B_s^0 → ϕ(K^+K^-)η'(π^+π^-η) is of particular interest in flavour physics because in the Standard Model it proceeds predominantly through the quark transition b̅ → s̅ss̅. However, the reconstruction of this decay is experimentally challenging due to the presence of the neutral η particle, which significantly reduces the overall reconstruction efficiency. In this study, the feasibility of using the partial reconstruction technique to reconstruct the invariant mass of the B_s^0 meson without explicitly detecting the η particle is investigated. Monte Carlo simulated events corresponding to an FCC-ee environment are used, and the effects of detector momentum and vertex resolutions on the reconstruction performance are examined. The results show that improved vertex resolution substantially improves the global reconstructed mass response and partial-reconstruction efficiency, while improvements in momentum resolution are manifested primarily through a narrowing of the fitted central DCB component. These findings suggest that future high-luminosity e^+e^- colliders such as FCC-ee could effectively exploit the partial reconstruction technique to study rare decay modes containing undetected neutral particles.
ER -