| Article | |
| Report number | arXiv:2206.11676 ; KCL-PH-TH/2022-35 ; CERN-TH-2022-089 |
| Title | Probing Neutral Triple Gauge Couplings at the LHC and Future Hadron Colliders |
| Author(s) | 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) |
| Publication | 2023-02-01 |
| Imprint | 2022-06-23 |
| Number of pages | 57 |
| In: | Phys. Rev. D 107 (2023) 035005 |
| DOI | 10.1103/PhysRevD.107.035005 (publication) |
| Subject category | Particle Physics - Experiment ; Particle Physics - Phenomenology |
| Abstract | 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. We derive the neutral triple gauge vertices (nTGVs) generated by these dimension-8 operators in the broken phase and map them onto a newly generalized form factor formulation, which takes into account only the residual U(1)$_{\rm{em}}$ gauge symmetry. Using this mapping, we derive new relations between the form factors that guarantee a truly consistent form factor formulation of the nTGVs and remove large unphysical energy-dependent terms. We then analyze the sensitivity reaches of the LHC and future 100TeV hadron colliders for probing the nTGCs via both the dimension-8 nTGC operators and the corresponding nTGC form factors in the reactions $ pp(q\bar{q})\to Z\gamma$ with $Z\to\ell^+\ell^-,\nu\bar{\nu}$. We compare their sensitivities with the existing LHC measurements of nTGCs and with those of the high-energy $e^+e^-$ colliders. In general, we find that the prospective LHC sensitivities are comparable to those of an $e^+ e^-$ collider with center-of-mass energy $\leq 1$TeV, whereas an $e^+ e^-$ collider with center-of-mass energy $(3 - 5)$TeV would have greater sensitivities, and a 100TeV $pp$ collider could provide the most sensitive probes of the nTGCs. |
| Copyright/License | publication: © 2023-2024 authors (License: CC BY 4.0), sponsored by SCOAP³ preprint: (License: CC BY 4.0) |
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Registre creat el 2022-07-10, darrera modificació el 2023-11-24