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Interference Effects in $\mathbf{gg \to H \to Z \gamma}$ Beyond Leading Order
/ Buccioni, Federico (Munich, Tech. U.) ; Devoto, Federica (U. Oxford (main)) ; Djouadi, Abdelhak (Granada U.) ; Ellis, John (King's Coll. London ; CERN) ; Quevillon, Jérémie (Annecy, LAPTH) ; Tancredi, Lorenzo (Munich, Tech. U.)
The ATLAS and CMS collaborations at the LHC have recently announced evidence for the rare Higgs boson decay into a $Z$ boson and a photon. We analyze the interference between the process $gg\! \to \! H \! \to \! Z \gamma$ induced by loops of heavy particles, which is by far the dominant contribution to the signal, and the continuum $gg \to Z \gamma$ QCD background process mediated by light quark loops. [...]
arXiv:2312.12384; KCL-PH-TH/2023-70; CERN-TH-2023-228; TUM-HEP-1488/23; OUTP-23-18P.-
2024-03-24 - 6 p.
- Published in : Phys. Lett. B 851 (2024) 138596
Fulltext: PDF;
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The Universal One-Loop Effective Action with Gravity
/ Larue, Rémy (LPSC, Grenoble) ; Quevillon, Jérémie (LPSC, Grenoble ; CERN)
We complete the so-called Universal One-Loop Effective Action (UOLEA) with effects of gravity and provide a systematic approach to incorporate higher dimensional operators in curved spacetime. The functional determinant stemming from the path integral is computed using the Covariant Derivative Expansion (CDE), in a momentum representation that does not rely on a specific choice of coordinate to be defined, as it often is. [...]
arXiv:2303.10203.-
2023-11-09 - 38 p.
- Published in : JHEP 2311 (2023) 045
Fulltext: document - PDF; 2303.10203 - PDF;
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Axion-like ALPs
/ Arias-Aragón, Fernando (LPSC, Grenoble) ; Quevillon, Jérémie (LPSC, Grenoble ; CERN) ; Smith, Christopher (LPSC, Grenoble)
The Effective Field Theory (EFT) Lagrangian for a generic axion-like particle (ALP) has many free parameters, and leaves quite some freedom for the expected phenomenology. In this work, we set up more constrained EFTs by enforcing true axion-like properties for the ALP. [...]
arXiv:2211.04489; CERN-TH-2022-182.-
2023-03-17 - 23 p.
- Published in : JHEP 2303 (2023) 134
Fulltext: document - PDF; 2211.04489 - PDF;
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Les Houches 2019 Physics at TeV Colliders: New Physics Working Group Report
/ Brooijmans, G. (Columbia U.) ; Buckley, A. (Glasgow U.) ; Caron, S. (Nijmegen U., IMAPP ; Nikhef, Amsterdam) ; Falkowski, A. (IJCLab, Orsay) ; Fuks, B. (IUF, Paris ; Paris, LPTHE) ; Gilbert, A. (Northwestern U.) ; Murray, W.J. (Warwick U. ; Rutherford) ; Nardecchia, M. (Rome U.) ; No, J.M. (Madrid, Autonoma U. ; Madrid, IFT) ; Torre, R. (INFN, Genoa ; CERN) et al.
This report presents the activities of the `New Physics' working group for the `Physics at TeV Colliders' workshop (Les Houches, France, 10--28 June, 2019). [...]
arXiv:2002.12220.
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Higgs boson pair production at colliders: status and perspectives
/ Di Micco, Biagio (ed.) (INFN, Rome3 ; Rome III U.) ; Gouzevitch, Maxime (ed.) (Lyon, IPN) ; Mazzitelli, Javier (ed.) (Zurich U.) ; Vernieri, Caterina (ed.) (SLAC) ; Alison, J. (Carnegie Mellon U.) ; Androsov, K. (INFN, Pisa) ; Baglio, J. (Tubingen U.) ; Bagnaschi, E. (PSI, Villigen) ; Banerjee, S. (Durham U., IPPP) ; Basler, P. (KIT, Karlsruhe, TTP) et al.
This document summarises the current theoretical and experimental status of the di-Higgs boson production searches, and of the direct and indirect constraints on the Higgs boson self-coupling, with the wish to serve as a useful guide for the next years. The document discusses the theoretical status, including state-of-the-art predictions for di-Higgs cross sections, developments on the effective field theory approach, and studies on specific new physics scenarios that can show up in the di-Higgs final state. [...]
arXiv:1910.00012; FERMILAB-CONF-19-468-E-T; LHCXSWG-2019-005.-
2020-11 - 161 p.
- Published in : Rev. Phys. 5 (2020) 100045
Fulltext: 1910.00012 - PDF; fermilab-conf-19-468-e-t - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server (fulltext available)
In : Double Higgs Production at Colliders, Batavia, IL, USA, 4 - 9 Sep 2018, pp.100045
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