| Article | |
| Report number | arXiv:2308.16887 ; KCL-PH-TH/2023-39 ; CERN-TH-2023-129 |
| Title | Probing neutral triple gauge couplings with () production at hadron colliders |
| Author(s) | Ellis, John (King's Coll. London ; CERN ; Shanghai Jiao Tong U.) ; He, Hong-Jian (Shanghai Jiaotong U. ; Tsinghua U., Beijing ; Peking U.) ; Xiao, Rui-Qing (King's Coll. London ; Shanghai Jiao Tong U.) |
| Publication | 2023-12-01 |
| Imprint | 2023-08-31 |
| Number of pages | 7 |
| Note | 25 pages (including supplemental material), only minor refinements, to match the version of PRD(letter) |
| In: | Phys. Rev. D 108 (2023) L111704 |
| DOI | 10.1103/PhysRevD.108.L111704 (publication) |
| Subject category | hep-ph ; Particle Physics - Phenomenology ; Particle Physics - Experiment |
| Abstract | We study probes of neutral triple gauge couplings (nTGCs) via $Z^*\gamma$ production followed by off-shell decays $Z^*\to\nu\bar{\nu}$ at the LHC and future $pp$ colliders, including both CP-conserving (CPC) and CP-violating (CPV) couplings. We present the dimension-8 SMEFT operators contributing to nTGCs and derive the correct form factor formulation for the off-shell vertices $Z^*\gamma V^*$ ($V=Z,\gamma$) by matching them with the dimension-8 SMEFT operators. Our analysis includes new contributions enhanced by the large off-shell momentum of $Z^*$, beyond those of the conventional $Z\gamma V^*$ vertices with on-shell $Z\gamma$. We analyze the sensitivity reaches for probing the CPC/CPV nTGC form factors and the new physics scales of the dimension-8 nTGC operators at the LHC and future 100TeV $pp$ colliders. We compare our new predictions with the existing LHC measurements of CPC nTGCs in the $\nu\bar\nu\gamma$ channel and demonstrate the importance of our new method. |
| Copyright/License | publication: © 2023-2024 authors (License: CC BY 4.0), sponsored by SCOAP³ preprint: (License: CC BY 4.0) |
Corresponding record in: Inspire
Rekord stworzony 2023-09-02, ostatnia modyfikacja 2024-01-11