Precision Physics in the Era of (HL)LHC

Maurizio Pierini

doi:10.53941/hihep.2025.100011

Abstract

The LHC was conceived as the ultimate discovery machine, designed mainly to find the Higgs boson and extensively search for SUSY and its alternatives at the electroweak (EW) energy scale. After a decade of operation, thanks to improved detector performance and advanced algorithms, the LHC experiments entered a precision era, surpassing LEP and Tevatron in many areas. Innovations such as deep learning and new data-taking methods have further extended their reach, beyond assumed limitations such as the trigger bandwidth. The luminosity upgrade of LHC, HL-LHC, promises even greater precision with upgraded detectors. The LHC experiments will remain leading in high-energy physics for the foreseeable future, leaving a lasting impact on various fronts.

References

1.
ATLAS Collaboration. Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC. Phys. Lett. B 2012, 716, 1–29.
2.
CMS Collaboration. Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC. Phys. Lett. B 2012, 716, 30–61.
3.
Gianotti, F. Talk at ICHEP 2022, Bologna, Italy. Available online: https://agenda.infn.it/event/28874/contributions/171915/attachments/95072/130540/ICHEP-Higgs-2022-Fabiola.pdf (accessed on 30 March 2025).
4.
CMS Collaboration. Enriching the physics program of the CMS experiment via data scouting and data parking. Phys. Rep. 2025, 1115, 678–772.
5.
Aaij, R.; Benson, S.; Cian, M.D.; et al. A comprehensive real-time analysis model at the LHCb experiment. J. Instrum. 2019, 14, P04006.
6.
Boveia, A.; ATLAS Collaboration. Trigger Level Analysis Technique in ATLAS for Run 2 and Beyond. 2019. Available online: https://cds.cern.ch/record/2703715 (accessed on 20 November 2024).
7.
CMS Collaboration. Performance of Heavy-Flavour Jet Identification in Boosted Topologies in Proton-Proton Collisions at √s = 13 TeV; CMS-PAS-BTV-22-001; CERN: Geneva, Switzerland, 2023.
8.
ATLAS Collaboration; CERN. ATL-PHYS-PUB-2023-021. 2023. Available online: https://cds.cern.ch/record/2866601 (accessed on 20 November 2024).
9.
CMS Collaboration. Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV. J. Instrum. 2018, 13, P05011.
10.
ATLAS Collaboration. ATLAS flavour-tagging algorithms for the LHC Run 2 pp collision dataset. Eur. Phys. J. C 2023, 83, 681.
11.
CMS Collaboration. Identification of hadronic tau lepton decays using a deep neural network. J. Instrum. 2022, 17, P07023.
12.
ATLAS Collaboration. Identification of Hadronic Tau Lepton Decays Using Neural Networks in the ATLAS Experiment; ATL-PHYS-PUB-2019-033; CERN: Geneva, Switzerland, 2019.
13.
CMS Collaboration. A portrait of the Higgs boson by the CMS experiment ten years after the discovery. Nature 2022, 607, 60–68.
14.
ATLAS Collaboration. A detailed map of Higgs boson interactions by the ATLAS experiment ten years after the discovery. Nature 2022, 607, 52–59.
15.
ATLAS; CMS Collaborations; CERN. CMS-PAS-FTR-22-001. 2022. Available online: https://cds.cern.ch/record/2806962 (accessed on 20 November 2024).
16.
CMS Collaboration. Measurement of the W boson decay branching fraction ratio B(W → cq)/B(W → qq-′) in proton- proton collisions at √s = 13 TeV. arXiv 2024, arXiv:2412.16296.
17.
CMS Collaboration. Measurement of the Drell-Yan forward-backward asymmetry and of the effective leptonic weak mixing angle in proton-proton collisions at √s = 13 TeV. arXiv 2024, arXiv:2408.07622.
18.
LHCb Collaboration. Measurement of the effective leptonic weak mixing angle. J. High Energy Phys. 2024, 12, 026.
19.
ATLAS Collaboration. Measurement of the W-boson mass and width with the ATLAS detector using proton–proton collisions at √s = 7 TeV. Eur. Phys. J. C 2024, 84, 1309.
20.
CMS Collaboration. High-precision measurement of the W boson mass with the CMS experiment at the LHC. arXiv 2024, arXiv:2412.13872.
21.
CMS Collaboration. Review of top quark mass measurements in CMS. Phys. Rep. 2025, 1115, 116–218.
22.
ATLAS; CMS Collaborations. Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV. J. High Energy Phys. 2023, 7, 213.
23.
ATLAS Collaboration. Combined Measurement of the Higgs Boson Mass from the and Decay Channels with the ATLAS Detector Using , 8, and 13 TeV Collision Data. Phys. Rev. Lett. 2023, 131, 251802.
24.
CMS Collaboration. Measurement of the Higgs boson mass and width using the four-lepton final state in proton-proton collisions at √s = 13 TeV. arXiv 2024, arXiv:2409.13663.
25.
Espinosa, J.R.; Giudice, G.F.; Morgante, E.; et al. The cosmological Higgstory of the vacuum instability. J. High Energy Phys. 2015, 9, 174.
26.
Hiller, G.; Hhne, T.; Litim, D.F.; et al. Vacuum stability in the Standard Model and beyond. Phys. Rev. D 2024, 110, 115017.
27.
CMS Collaboration. Determination of the strong coupling and its running from measurements of inclusive jet production. arXiv 2024, arXiv:2412.16665.
28.
ATLAS Collaboration. A precise determination of the strong-coupling constant from the recoil of Z bosons with the ATLAS experiment at √s = 8 TeV. arXiv 2023, arXiv:2309.12986.
29.
LHCb Collaboration. Simultaneous determination of CKM angle γ and charm mixing parameters. J. High Energy Phys. 2021, 12, 141,
30.
UTfit Collaboration. New UTfit analysis of the unitarity triangle in the Cabibbo–Kobayashi–Maskawa scheme. Rend. Lincei. Sci. Fis. Nat. 2023, 34, 37–57.
31.
CMS Collaboration. Evidence for CP violation and measurement of CP-violating parameters in → J/ψ,ϕ(1020) decays in pp collisions at √s = 13 TeV. arXiv 2024, arXiv:2412.19952.
32.
Cranmer, K.; Yavin, I. RECAST—extending the impact of existing analyses. J. High Energy Phys. 2011, 4, 38.
33.
ATLAS; CMS Collaborations. Highlights of the HL-LHC physics projections by ATLAS and CMS. arXiv 2025, arXiv:2504.00672.
34.
ATLAS; Belle II; CMS; et al. Projections for Key Measurements in Heavy Flavour Physics. arXiv 2025, arXiv:2503.24346.

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