Probing neutral triple gauge couplings with Z*γ (νν¯γ) production at hadron colliders
APS, 2023
Online
academicJournal
- 7
Zugriff:
We study probes of neutral triple gauge couplings (nTGCs) via Z*γ production with off-shell decays Z*→νν¯ at the LHC and the projected pp (100 TeV) colliders, including both CP-conserving (CPC) and CP-violating (CPV) couplings. We present the dimension-8 Standard Model effective field theory (SMEFT) operators contributing to nTGCs and derive the correct form factor formulation for the doubly off-shell vertices Z*γV* (V=Z, γ) by matching them with the dimension-8 SMEFT operators. We include new contributions enhanced by the large off-shell momentum of Z*, beyond those of the conventional ZγV* vertices with on-shell Zγ. 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 100 TeV pp colliders. We compare our new predictions with the existing LHC measurements of CPC nTGCs in the νν¯γ channel and demonstrate the importance of our new method.
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Probing neutral triple gauge couplings with Z*γ (νν¯γ) production at hadron colliders
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Autor/in / Beteiligte Person: | Ellis, John ; He, Hong-Jian ; Xiao, Rui-Qing |
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Veröffentlichung: | APS, 2023 |
Medientyp: | academicJournal |
Umfang: | 7 |
DOI: | 10.1103/PhysRevD.108.L111704 |
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