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1.
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Flavor physics at the CEPC: a general perspective*
/ Ai, Xiaocong (Zhengzhou U.) ; Altmannshofer, Wolfgang (UC, Santa Cruz, Inst. Part. Phys. ; UC, Santa Cruz (main)) ; Athron, Peter (Nanjing Normal U.) ; Bai, Xiaozhi (USTC, Hefei) ; Calibbi, Lorenzo (Nankai U.) ; Cao, Lu (Fudan U., Shanghai ; DESY) ; Che, Yuzhi (Beijing, Inst. High Energy Phys. ; UCAS, Beijing) ; Chen, Chunhui (Iowa State U.) ; Chen, Ji-Yuan (Shanghai Jiaotong U.) ; Chen, Long (Shandong U.) et al.
We discuss the landscape of flavor physics at the Circular Electron-Positron Collider (CEPC), based on the nominal luminosity outlined in its Technical Design Report. The CEPC is designed to operate in multiple modes to address a variety of tasks. [...]
arXiv:2412.19743.-
2025 - 56 p.
- Published in : Chin. Phys.: 49 (2025) , no. 10, pp. 103003
Fulltext: 2412.19743 - PDF; document - PDF;
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Probing Neutral Triple Gauge Couplings via $ZZ$ Production at $e^+e^-$ Colliders
/ Ellis, John (Shanghai Jiao Tong U. ; King's Coll. London ; CERN) ; He, Hong-Jian (Tsung-Dao Lee Inst., Shanghai ; Shanghai Jiao Tong U. ; Tsinghua U., Beijing ; Peking U., CHEP) ; Xiao, Rui-Qing (Peking U.) ; Zeng, Shi-Ping (Tsung-Dao Lee Inst., Shanghai ; Shanghai Jiao Tong U.)
Neutral triple gauge couplings (nTGCs) first arise from the dimension-8 operators of the Standard Model Effective Field Theory (SMEFT), rather than the dimension-4 SM Lagrangian and dimension-6 SMEFT operators, opening up a unique window for probing new physics at the dimension-8 level. [...]
arXiv:2506.21433 ; KCL-PH-TH/2025-28 ; CERN-TH-2025-122.
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2024-11-07 - 36.
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UV Completion of Neutral Triple Gauge Couplings
/ Ellis, John (Shanghai Jiaotong U. ; King's Coll. London ; CERN) ; He, Hong-Jian (Shanghai Jiaotong U. ; Shanghai Jiao Tong U. ; Tsinghua U., Beijing ; Peking U., CHEP) ; Xiao, Rui-Qing (Shanghai Jiaotong U. ; King's Coll. London ; Shanghai Jiao Tong U.) ; Zeng, Shi-Ping (Shanghai Jiaotong U. ; Shanghai Jiao Tong U.) ; Zheng, Jiaming (Shanghai Jiaotong U. ; Shanghai Jiao Tong U.)
Neutral triple gauge couplings (nTGCs) are manifestation of new physics beyond the Standard Model (SM), as they are absent in the SM and are first generated by dimension-8 operators in the SM Effective Field Theory (SMEFT). We study the UV completion of nTGCs in a renormalizable model with vector-like heavy fermions. [...]
arXiv:2408.12508; KCL-PH-TH/2024-45; CERN-TH-2024-143.-
2025-01-01 - 18 p.
- Published in : Phys. Rev. D 111 (2025) 015007
Fulltext: 2408.12508 - PDF; Publication - PDF;
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Probing Neutral Triple Gauge Couplings via $\boldsymbol{Z\gamma\,(\ell^+\ell^-\gamma)}$ Production at $\boldsymbol{e^+e^-}$ Colliders
/ Liu, Danning (Shanghai Jiao Tong U. ; Tsung-Dao Lee Inst., Shanghai ; KLPAC, Shanghai ; SKLPPC, Shanghai) ; Xiao, Rui-Qing (Shanghai Jiao Tong U. ; King's Coll. London ; KLPAC, Shanghai ; SKLPPC, Shanghai) ; Li, Shu (Shanghai Jiao Tong U. ; Peking U., CHEP ; Tsung-Dao Lee Inst., Shanghai ; KLPAC, Shanghai ; SKLPPC, Shanghai) ; Ellis, John (Shanghai Jiao Tong U. ; King's Coll. London ; CERN ; Tsung-Dao Lee Inst., Shanghai) ; He, Hong-Jian (Shanghai Jiao Tong U. ; Peking U., CHEP ; Tsung-Dao Lee Inst., Shanghai ; KLPAC, Shanghai ; SKLPPC, Shanghai) ; Yuan, Rui (Shanghai Jiao Tong U. ; Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai)
Neutral triple gauge couplings (nTGCs) are absent in the Standard Model (SM) and at the dimension-6 level in the Standard Model Effective Field Theory (SMEFT), arising first from dimension-8 operators. As such, they provide a unique window for probing new physics beyond the SM. [...]
arXiv:2404.15937; KCL-PH-TH/2024-18; CERN-TH-2024-046.-
2025 - 14 p.
- Published in : Front. Phys. (Beijing) 20 (2025) 15201
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CEPC Technical Design Report: Accelerator
/ CEPC Study Group Collaboration
The Circular Electron Positron Collider (CEPC) is a large scientific project initiated and hosted by China, fostered through extensive collaboration with international partners. The complex comprises four accelerators: a 30 GeV Linac, a 1.1 GeV Damping Ring, a Booster capable of achieving energies up to 180 GeV, and a Collider operating at varying energy modes (Z, W, H, and ttbar). [...]
arXiv:2312.14363; IHEP-CEPC-DR-2023-01; IHEP-AC-2023-01.-
2024-12-16 - 9 p.
- Published in : Radiat. Detect. Technol. Methods: 8 (2024) , no. 1, pp. 1-1105
Fulltext: 2312.14363 - PDF; Publication - PDF; document - PDF;
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Probing Neutral Triple Gauge Couplings at the LHC and Future Hadron Colliders
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn ; Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai) ; He, Hong-Jian (Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai ; Tsinghua U., Beijing ; Tsinghua U., Beijing, CHEP) ; Xiao, Rui-Qing (King's Coll. London ; Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai)
We study probes of neutral triple gauge couplings (nTGCs) at the LHC and the proposed 100TeV $pp$ colliders, and compare their sensitivity reaches with those of the proposed $e^+ e^-$ colliders. The nTGCs provide a unique window to the new physics beyond the Standard Model (SM) because they can arise from SM effective field theory (SMEFT) operators that respect the full electroweak gauge group $SU(2)_L\otimes U(1)_Y$ of the SM only at the level of dimension-8 or higher. [...]
arXiv:2206.11676; KCL-PH-TH/2022-35; CERN-TH-2022-089.-
2023-02-01 - 57 p.
- Published in : Phys. Rev. D 107 (2023) 035005
Fulltext: 2206.11676 - PDF; Publication - PDF;
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Probing New Physics in Dimension-8 Neutral Gauge Couplings at $e^+e^-$ Colliders
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; He, Hong-Jian (Tsung-Dao Lee Inst., Shanghai ; Shanghai Jiao Tong U. ; Tsinghua U., Beijing ; Peking U., CHEP) ; Xiao, Rui-Qing (Tsung-Dao Lee Inst., Shanghai ; Shanghai Jiaotong U.)
Neutral triple gauge couplings (nTGCs) are absent in the standard model effective theory up to dimension-6 operators, but could arise from dimension-8 effective operators. In this work, we study the pure gauge operators of dimension-8 that contribute to nTGCs and are independent of the dimension-8 operator involving the Higgs doublet. [...]
arXiv:2008.04298; KCL-PH-TH/2020-28; CERN-TH-2020-076.-
2020-10-30 - 25 p.
- Published in : Sci. China Phys. Mech. Astron. 64 (2021) 221062
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CEPC Conceptual Design Report: Volume 2 - Physics & Detector
/ CEPC Study Group Collaboration
The Circular Electron Positron Collider (CEPC) is a large international scientific facility proposed by the Chinese particle physics community to explore the Higgs boson and provide critical tests of the underlying fundamental physics principles of the Standard Model that might reveal new physics. [...]
arXiv:1811.10545 ; IHEP-CEPC-DR-2018-02 ; IHEP-EP-2018-01 ; IHEP-TH-2018-01.
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2018 - 424.
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