Skip to content
DraconiticResearch
Search Sources API
203,948 studies31 sourcesUpdated 10 min ago
Peer-reviewedCC BY 4.0Journal of High Energy Physics

Prospect for measurement of CP-violating parameters of Bs0→ ϕ γ at the Tera Z factory

  • Hengyu Wang1,2
  • Hanhua Cui1,2
  • Yongfeng Zhu1,2
  • Hao Liang1,2
  • Yuexin Wang1,2
  • Kaili Zhang1,2
  • Yi Wang1,2
  • Weizheng Song1,2
  • Lingfeng Li2
  • Yang Zhang1,2
  • Shanzhen Chen1,2,3
  • Manqi Ruan1,2,3
  1. 1Chinese Academy of Sciences
  2. 2University of Chinese Academy of Sciences (UCAS)
  3. 3Henan Center for High Energy Physics
Read full textPDFDOICite

Abstract

A bstract : The b → sγ transition is a critical flavor-changing neutral current (FCNC) process that could be used to probe CP parity violation (CPV) and new physics (NP). Future electron-positron colliders operating as Tera-Z factories, such as the Circular Electron-Positron Collider (CEPC) and the Future Circular Collider (FCC-ee), offer unique advantages for studying flavor physics, as they provide large data samples, clean collision environments, and superior detector performance. Based on fast simulation studies, we quantify the anticipated precision for measuring Bs0→ ϕ γ at the CEPC Z pole operation, showing that the relative statistical uncertainty could be (0 . 107 ± 0 . 004)%, improved by approximately two orders of magnitude compared to existing measurements. Additionally, we perform a time-dependent analysis of the Bs0→ ϕ γ decay, accounting for Bs0-B̅ s0 mixing to extract the mixing-induced and CP-violating parameters 𝒜ϕ γ Δ , 𝒞 ϕγ , and 𝒮 ϕγ . Using the central values of the LHCb measurements as inputs, the anticipated precisions of these parameters are evaluated as:

cAϕ γ Δ =−0.670± 0.021(stat.)± 0.040(syst.), 𝒞ϕ γ =0.110± 0.010(stat.)± 0.008(syst.), 𝒮ϕ γ =0.430± 0.010(stat.)± 0.010(syst.).

These promising results not only highlight the physics potential of the CEPC but also provide a critical reference for similar future e ⁺ e − facilities, notably the FCC-ee.

Related

  1. Lifetime-Resolved Triple-Dimuon Resonances from Rare Z Decays at Tera-Z
    Renjie Wang
    Physics Letters BPeer-reviewedCC BY 4.0High-energy & particle physicsCrossref
  2. Measurement of CP Asymmetry Parameters and Polarization Correlations in Ω−Ω̅+ Pairs
    BESIII Collaboration, M. Ablikim, M. N. Achasov +777
    arXivPreprintCC BY 4.0Full textHigh-energy & particle physicsarXiv
  3. Measurement of time-dependent CP violation parameters in B0 → KS0 π0 γ decays at Belle and Belle II
    Belle, Belle II Collaborations, M. Abumusabh +416
    arXivPreprintCC BY 4.0Full textHigh-energy & particle physicsarXiv
  4. Measurement of Neutrino Oscillation Parameters at JUNO and Indication of the Neutrino Mass Ordering
    Thomas Adam, Timo Ahola, Nurbakyt Amanbek +572
    HALPreprintCC BY 4.0Full textHigh-energy & particle physicsHALarXiv
  5. The Yottascale at Tera-Z: Petascale SUSY?
    Lukas Allwicher, Francisco N. C. Dahab, Christophe Grojean +2
    arXivPreprintarXiv licenceFull textHigh-energy & particle physicsarXiv

Cite

BibTeXRIS
BibTeX
@article{wang2026prospect,
  title = {{Prospect for measurement of CP-violating parameters of $$B_s^0\to \phi \gamma $$ at the Tera Z factory}},
  author = {Hengyu Wang and Hanhua Cui and Yongfeng Zhu and Hao Liang and Yuexin Wang and Kaili Zhang and Yi Wang and Weizheng Song and Lingfeng Li and Yang Zhang and Shanzhen Chen and Manqi Ruan},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = oct,
  doi = {10.1007/jhep10(2026)147},
  url = {https://link.springer.com/article/10.1007/JHEP10(2026)147},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Prospect for measurement of CP-violating parameters of B_s^0→ ϕ γ at the Tera Z factory
AU  - Hengyu Wang
AU  - Hanhua Cui
AU  - Yongfeng Zhu
AU  - Hao Liang
AU  - Yuexin Wang
AU  - Kaili Zhang
AU  - Yi Wang
AU  - Weizheng Song
AU  - Lingfeng Li
AU  - Yang Zhang
AU  - Shanzhen Chen
AU  - Manqi Ruan
PY  - 2026
DA  - 2026/10/14
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep10(2026)147
UR  - https://link.springer.com/article/10.1007/JHEP10(2026)147
AB  - A bstract : The b → sγ transition is a critical flavor-changing neutral current (FCNC) process that could be used to probe CP parity violation (CPV) and new physics (NP). Future electron-positron colliders operating as Tera-Z factories, such as the Circular Electron-Positron Collider (CEPC) and the Future Circular Collider (FCC-ee), offer unique advantages for studying flavor physics, as they provide large data samples, clean collision environments, and superior detector performance. Based on fast simulation studies, we quantify the anticipated precision for measuring B_s^0→ ϕ γ at the CEPC Z pole operation, showing that the relative statistical uncertainty could be (0 . 107 ± 0 . 004)%, improved by approximately two orders of magnitude compared to existing measurements. Additionally, we perform a time-dependent analysis of the B_s^0→ ϕ γ decay, accounting for B_s^0-B̅ _s^0 mixing to extract the mixing-induced and CP-violating parameters 𝒜_ϕ γ ^Δ  , 𝒞 ϕγ , and 𝒮 ϕγ . Using the central values of the LHCb measurements as inputs, the anticipated precisions of these parameters are evaluated as:  cA_ϕ γ ^Δ =−0.670± 0.021(stat.)± 0.040(syst.), 𝒞_ϕ γ =0.110± 0.010(stat.)± 0.008(syst.), 𝒮_ϕ γ =0.430± 0.010(stat.)± 0.010(syst.).  These promising results not only highlight the physics potential of the CEPC but also provide a critical reference for similar future e ⁺ e − facilities, notably the FCC-ee.
SN  - 1029-8479
ER  -