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1.
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Basis for Anomalous Quartic Gauge Couplings
/ Durieux, Gauthier (Louvain U., CP3) ; Remmen, Grant N. (New York U., CCPP) ; Rodd, Nicholas L. (LBL, Berkeley ; UC, Berkeley) ; Éboli, O.J.P. (Sao Paulo U.) ; Gonzalez-Garcia, M.C. (YITP, Stony Brook ; ICREA, Barcelona ; Barcelona, Autonoma U.) ; Kondo, Dan (Tokyo U., IPMU ; Tokyo U., ICRR) ; Murayama, Hitoshi (LBL, Berkeley ; UC, Berkeley ; Tokyo U., IPMU ; Tokyo U., ICRR) ; Okabe, Risshin (Tokyo U., IPMU ; Tokyo U., ICRR)
In this note, we give a definitive basis for the dimension-eight operators leading to quartic - but no cubic - interactions among electroweak gauge bosons. These are often called anomalous quartic gauge couplings, or aQGCs. [...]
CERN-LHCEFTWG-2024-002; CERN-LPCC-2024-002; arXiv:2411.02483.-
Geneva : CERN, 2024 - 8 p.
Fulltext: CERN-LHCEFTWG-2024-002 - PDF; 2411.02483 - PDF; arXiv v1: PDF;
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2.
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LHC EFT WG Note: SMEFT predictions, event reweighting, and simulation
/ Schoefbeck, Robert (Austrian Academy of Sciences (AT)) ; Belvedere, Alberto (Deutsches Elektronen-Synchrotron (DE)) ; Bhattacharya, Saptaparna (Wayne State University (US)) ; Chatterjee, Suman (Austrian Academy of Sciences (AT)) ; Calandri, Alessandro (ETH Zurich (CH)) ; Sanchez Cruz, Sergio (CERN) ; Dickinson, Jennet Elizabeth (Fermi National Accelerator Lab. (US)) ; Glessgen, Franz Jacob (ETH Zurich (CH)) ; Goldouzian, Reza (University of Notre Dame (US)) ; Grohsjean, Alexander (Hamburg University (DE)) et al.
This note gives an overview of the tools for predicting expectations in the Standard Model effective field theory (SMEFT) at the tree level and one loop available through event generators. Methods of event reweighting, the separate simulation of squared matrix elements, and the simulation of the full SMEFT process are compared in terms of statistical efficacy and potential biases..
arXiv:2406.14620; CERN-LHCEFTWG-2024-001; CERN-LPCC-2024-001.-
Geneva : CERN, 2024 - 42 p.
Fulltext: da0a86c213c0c72b823f69c0b79b403b - PDF; 2406.14620 - PDF; Updated draft: PDF; External link: Fermilab Library Server
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3.
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System engineering design approach and virtual assessment of a new charging arm concept for LHC robotic TIM
/ Zoppoli, Andrea (Naples U.) ; Armentani, Enrico (Naples U.) ; Buonocore, Luca (CERN) ; Buonocore, Sara (Naples U.) ; Di Giovannantonio, Sergio (CERN) ; Di Castro, Mario (CERN) ; Di Gironimo, Giuseppe (Naples U.)
System engineering (SE) methods and principles are nowadays widely adopted in the product development processes, especially in the industrial sector, where saving production time and costs are primary goals. This work describes an application
of a particular SE methodology, the V-model-based design, in which the system development lifecycle is divided on the basis
of a graphical V-shaped scheme, called V-model. [...]
2023 - 18 p.
- Published in : Int. J. Adv. Manuf. Technol. 128 (2023) 1889-1906
Fulltext: PDF;
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4.
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Ad interim recommendations for the Higgs boson production cross sections at $\sqrt{s} = 13.6$ TeV
/ Karlberg, Alexander (CERN) ; Malcles, Julie (Université Paris-Saclay (FR)) ; Mistlberger, Bernhard (SLAC National Accelerator Laboratory (US)) ; Di Nardo, Roberto (Universita e INFN Roma Tre (IT)) ; Jones, Stephen Philip (University of Durham (GB)) ; Abidi, Haider (Brookhaven National Laboratory (US)) ; Ferrario Ravasio, Silvia (CERN) ; Pellen, Mathieu (Albert Ludwigs Universitaet Freiburg (DE)) ; Barone, Gaetano (Brown University (US)) ; Cooperstein, Stephane Brunet (Univ. of California San Diego (US)) et al.
This note documents predictions for the production cross sections of the Standard Model Higgs boson at the Large Hadron Collider at a centre of mass energy of 13.6 TeV. The predictions here are based on simple extrapolations of previously documented predictions published in the CERN Yellow Report ”Deciphering the Nature of the Higgs Sector”. [...]
arXiv:2402.09955; LHCHWG-2024-001.-
Geneva : CERN, 2024 - 13 p.
Fulltext: PDF; Updated PDF following discussions before final approval: PDF;
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5.
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6.
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Effective Field Theory descriptions of Higgs boson pair production
/ Gröber, Ramona (Dipartimento di Fisica e Astronomia "G.Galilei", Università di Padova and INFN, Sezione di Padova, 35131 Padova, Italy) ; Alasfar, Lina (Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany) ; Cadamuro, Luca (Université Paris-Saclay (FR)) ; Dimitriadi, Christina (University of Bonn (DE)) ; Ferrari, Arnaud (Uppsala University (SE)) ; Heinrich, Gudrun Marlen (KIT - Karlsruhe Institute of Technology (DE)) ; Ingebretsen Carlson, Tom (Stockholm University (SE)) ; Lang, Jannis (Institute for Theoretical Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany) ; Ordek, Serhat (Uppsala University (SE)) ; Pereira Sanchez, Laura (Stockholm University (SE)) et al.
Higgs boson pair production is traditionally considered to be of particular interest for a measurement of the trilinear Higgs self-coupling. Yet it can offer insights into other couplings as well, since - in an effective field theory (EFT) parameterisation of potential new physics - both the production cross section and kinematical properties of the Higgs boson pair depend on various other Wilson coefficients of EFT operators. [...]
LHCHWG-2022-004.-
Geneva : CERN, 2022 - 38.
LHC Higgs WG note: PDF;
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7.
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Precision matching of microscopic physics to the Standard Model Effective Field Theory (SMEFT)
/ Greljo, Admir (Universitaet Bern (CH)) ; Dawson, Sally (Department of Physics, Brookhaven National Laboratory (US)) ; Lohwasser, Kristin (University of Sheffield (GB)) ; Aebischer, Jason (Universität Zürich (CH)) ; Das Bakshi, Supratim (Universidad de Granada (ES)) ; Carmona, Adrían (Universidad de Granada (ES)) ; Chakrabortty, Joydeep (Indian Institute of Technology Kanpur (IN)) ; Cohen, Timothy (University of Oregon (US)) ; Criado, Juan Carlos (Durham University (UK)) ; Fuentes-Martín, Javier (Universidad de Granada (ES)) et al.
This note gives an overview of the tools for the precision matching of ultraviolet theories to the Standard Model effective field theory (SMEFT) at the tree level and one loop. Several semi- and fully automated codes are presented, as well as some supplementary codes for the basis conversion and the subsequent running and matching at low energies. [...]
arXiv:2212.02905; CERN-LHCEFTWG-2022-002; CERN-LPCC-2022-07.-
Geneva : CERN, 2022 - 23 p.
Fulltext: CERN-LHCEFTWG-2022-002 - PDF; 2212.02905 - PDF;
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8.
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Towards a combination of LHC and TeVatron W-boson mass measurements
In this note methodological and modelling considerations towards a combination of the ATLAS, CDF and D0 measurements of the 𝑊-boson mass are discussed. As they were performed at different moments in time, each measurement employed different assumptions for the modelling of 𝑊-boson production and decay, as well as different fits of the parton distribution functions of the proton (PDFs). [...]
CERN-LPCC-2022-06; FERMILAB-TM-2779-V.-
2022 - 48 p.
Fulltext: PDF;
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9.
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Study of $t\bar{t}b\bar{b}$ and $t\bar{t}W$ background modelling for $t\bar{t}H$ analyses
/ Ferencz, Lars (Deutsches Elektronen-Synchrotron (DE)) ; Grevtsov, Kirill (DESY) ; Katzy, Judith (Deutsches Elektronen-Synchrotron (DE)) ; Knue, Andrea Helen (Albert Ludwigs Universitaet Freiburg (DE)) ; Van Der Linden, Jan (KIT - Karlsruhe Institute of Technology (DE)) ; McFayden, Josh (University of Sussex (GB)) ; Monig, Gianna (University of Sussex (GB)) ; Pfeffer, Emanuel Lorenz (KIT - Karlsruhe Institute of Technology (DE)) ; Saibel, Andrej (Univ. of Valencia and CSIC (ES)) ; Schroeder, Matthias (Hamburg University (DE)) et al.
This note presents Monte Carlo generator comparisons of the $t\bar{t}b\bar{b}$ and $t\bar{t}W$ processes at particle level. The aim is to compare the modelling of important backgrounds to $t\bar{t}H$ measurements in multi-lepton final states and in the $t\bar{t}H (H \to b\bar{b})$ decay channel and the treatment of the associated theory uncertainties for a combination of the full Run-2 $t\bar{t}H$ results from ATLAS and CMS. [...]
LHCHWG-2022-003.-
Geneva : CERN, 18 - 40.
Fulltext: PDF;
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10.
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LHC EFT WG Report: Experimental Measurements and Observables
/ Castro, Nuno (LIP - Laboratorio de Instrumentação e Física Experimental de Partículas (PT)) ; Cranmer, Kyle Stuart (New York University (US)) ; Gritsan, Andrei (Johns Hopkins University (US)) ; Howarth, James William (University of Glasgow (GB)) ; Magni, Giacomo (Nikhef) ; Mimasu, Ken (King's College London) ; Rojo Chacon, Juan (CERN) ; Roskes, Jeffrey (Johns Hopkins University (US)) ; Vryonidou, Eleni (University of Manchester (GB)) ; You, Tiann-Tevong (CERN)
The LHC effective field theory working group gathers members of the LHC experiments and the theory community to provide a framework for the interpretation of LHC data in the context of EFT. In this note we discuss experimental observables and corresponding measurements in analysis of the Higgs, top, and electroweak data at the LHC [...]
arXiv:2211.08353; CERN-LHCEFTWG-2022-001; CERN-LPCC-2022-05.-
Geneva : CERN, 2022 - 55 p.
53 pages, 17 figures: PDF; Fulltext: PDF;
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