002809469 001__ 2809469
002809469 005__ 20240220040739.0
002809469 0248_ $$aoai:cds.cern.ch:2809469$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002809469 035__ $$9arXiv$$aoai:arXiv.org:2211.08353
002809469 037__ $$9arXiv$$aarXiv:2211.08353$$chep-ph
002809469 035__ $$9Inspire$$aoai:inspirehep.net:2182396$$d2024-02-19T14:37:22Z$$h2024-02-20T03:00:30Z$$mmarcxml$$ttrue$$uhttps://inspirehep.net/api/oai2d
002809469 037__ $$9arXiv:reportnumber$$aCERN-LHCEFTWG-2022-001
002809469 035__ $$9Inspire$$a2182396
002809469 037__ $$9arXiv:reportnumber$$aCERN-LPCC-2022-05
002809469 041__ $$aeng
002809469 100__ $$0AUTHOR|(SzGeCERN)579053$$aCastro, [email protected]$$uLIP - Laboratorio de Instrumentação e Física Experimental de Partículas (PT)
002809469 245__ $$aLHC EFT WG Report: Experimental Measurements and Observables
002809469 260__ $$c2022
002809469 269__ $$aGeneva$$bCERN$$c2022-05-13
002809469 270__ [email protected]$$pAndrei Gritsan
002809469 300__ $$a55 p
002809469 500__ $$9arXiv$$aLHC EFT Working Group note, 55 pages, 17 figures
002809469 520__ $$aThe 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. We review the relationship between operators and measurements relevant for the interpretation of experimental data in the context of a global SMEFT analysis. One of the goals of ongoing effort is bridging the gap between theory and experimental communities working on EFT, and in particular concerning optimised analyses. This note serves as a guide to experimental measurements and observables leading to EFT fits and establishes good practice, but does not present authoritative guidelines how those measurements should be performed.
002809469 520__ $$9arXiv$$aThe 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. We review the relationship between operators and measurements relevant for the interpretation of experimental data in the context of a global SMEFT analysis. One of the goals of ongoing effort is bridging the gap between theory and experimental communities working on EFT, and in particular concerning optimised analyses. This note serves as a guide to experimental measurements and observables leading to EFT fits and establishes good practice, but does not present authoritative guidelines how those measurements should be performed.
002809469 540__ $$3preprint$$aCC BY 4.0$$uhttp://creativecommons.org/licenses/by/4.0/
002809469 562__ $$cComments submitted after 12-11-2022 03:31
002809469 595__ $$aCERN Invenio WebSubmit$$bGENSBM$$c1
002809469 591__ $$bdraft
002809469 65017 $$2SzGeCERN$$aParticle Physics - Phenomenology
002809469 6531_ $$9CERN$$aParticle Physics Experiment
002809469 6531_ $$9CERN$$ahep-ex
002809469 6531_ $$9CERN$$aParticle Physics Phenomenology
002809469 6531_ $$9CERN$$ahep-ph
002809469 690C_ $$aCERN
002809469 693__ $$aLHC
002809469 693__ $$eNot applicable
002809469 700__ $$0AUTHOR|(SzGeCERN)538804$$aCranmer, Kyle [email protected]$$uNew York University (US)
002809469 700__ $$0AUTHOR|(SzGeCERN)654418$$aGritsan, [email protected]$$uJohns Hopkins University (US)
002809469 700__ $$0AUTHOR|(SzGeCERN)700366$$aHowarth, James [email protected]$$uUniversity of Glasgow (GB)
002809469 700__ $$aMagni, Giacomo$$uNikhef
002809469 700__ $$aMimasu, Ken$$uKing's College London
002809469 700__ $$0AUTHOR|(SzGeCERN)675353$$aRojo Chacon, [email protected]$$uCERN
002809469 700__ $$aRoskes, Jeffrey$$uJohns Hopkins University (US)
002809469 700__ $$0AUTHOR|(SzGeCERN)817649$$aVryonidou, [email protected]$$uUniversity of Manchester (GB)
002809469 700__ $$0AUTHOR|(SzGeCERN)719635$$aYou, [email protected]$$uCERN
002809469 859__ [email protected]
002809469 8564_ $$82405557$$s3997015$$uhttps://cds.cern.ch/record/2809469/files/CERN-LHCEFTWG-2022-001_2.pdf$$y53 pages, 17 figures
002809469 8564_ $$82405557$$s14173$$uhttps://cds.cern.ch/record/2809469/files/CERN-LHCEFTWG-2022-001_2.jpg?subformat=icon-180$$xicon-180$$y53 pages, 17 figures
002809469 8564_ $$82405557$$s17247$$uhttps://cds.cern.ch/record/2809469/files/CERN-LHCEFTWG-2022-001_2.gif?subformat=icon$$xicon$$y53 pages, 17 figures
002809469 8564_ $$82407593$$s39162$$uhttps://cds.cern.ch/record/2809469/files/EWPO_indiv.png$$y00015 95\% CL individual limits from electroweak measurements.
002809469 8564_ $$82407594$$s95883$$uhttps://cds.cern.ch/record/2809469/files/STXS_dependencies_log.png$$y00013 Logarithm of normalised linear dependences for Higgs STXS measurements, as in Fig.~\ref{fig:EWPO}. Although the figure is labelled ``ATLAS'', since our analysis makes use of those specific measurements, STXS definitions, and therefore SMEFT dependences, are universal. Dependences include effects in both production and the nominal, $h\to 4\ell$ decay, except the first four. These quantify the dependences of the ratio of the other Higgs decay branching fractions to the nominal one.
002809469 8564_ $$82407595$$s8981$$uhttps://cds.cern.ch/record/2809469/files/venn.png$$y00008 \small Schematic representation of the datasets and their overlapping dependences on the 34 Wilson coefficients included in the analysis of Ref.~\cite{Ellis:2020unq}
002809469 8564_ $$82407596$$s80587$$uhttps://cds.cern.ch/record/2809469/files/Fisher_heat_NS_GLOBAL_NLO_HO.png$$y00014 \small The values of the diagonal entries of the Fisher information matrix evaluated for the dataset of the global linear (left) and quadratic (right panel) SMEFiT analysis The normalisation here is such that the sum of the entries associated to each EFT coefficient adds up to 100. For entries in the heat map larger than 10, we also indicate the corresponding numerical values.
002809469 8564_ $$82407597$$s32816$$uhttps://cds.cern.ch/record/2809469/files/Zjj_dependencies_log.png$$y00011 Logarithm of normalised linear dependences for each $\Delta\phi_{jj}$ bin from $-\pi$ to $\pi$ in the differential $Zjj$ measurement. The normalisation here is with respect to the strongest linear dependence across all bins of the measurement.
002809469 8564_ $$82407598$$s63553$$uhttps://cds.cern.ch/record/2809469/files/Higgs_indiv.png$$y00017 95\% CL individual limits from Higgs measurements.
002809469 8564_ $$82407599$$s45531$$uhttps://cds.cern.ch/record/2809469/files/roc1.png$$y00003 : justification=centerlast
002809469 8564_ $$82407600$$s29447$$uhttps://cds.cern.ch/record/2809469/files/roc2.png$$y00004 : The ROC curves showing the separation power between the processes driven by a $CP$-odd coupling $\theta_1$ and the SM $\theta_0$ (left) and between the 50\% mixture of the two processes with the positive and negative sign of interference (right). Three observables in the on-shell Higgs boson production in vector boson fusion are tested: $\Delta\Phi_\mathrm{JJ}$ (blue), optimized with matrix element (red) and machine learning (green). The study is inspired by Ref.~\cite{Gritsan:2020pib}.
002809469 8564_ $$82407601$$s4611905$$uhttps://cds.cern.ch/record/2809469/files/2211.08353.pdf$$yFulltext
002809469 8564_ $$82407602$$s102725$$uhttps://cds.cern.ch/record/2809469/files/schematic-text.png$$y00007 Illustration of simulation-based inference techniques that train a neural network surrogate for the likelihood or likelihood ratio function. Figure taken from Ref.~\cite{Brehmer:2018kdj}. Here $x$ corresponds to~$\vec{x}_\mathrm{reco}$. and $z$ denotes the full MC truth record.
002809469 8564_ $$82407603$$s44516$$uhttps://cds.cern.ch/record/2809469/files/diboson_dependencies_log.png$$y00010 Logarithm of normalised linear dependences for diboson measurements, as in Fig.~\ref{fig:EWPO}.
002809469 8564_ $$82407604$$s17813$$uhttps://cds.cern.ch/record/2809469/files/obsG.png$$y00000 : justification=centerlast
002809469 8564_ $$82407605$$s63491$$uhttps://cds.cern.ch/record/2809469/files/Higgs_dependencies_log.png$$y00012 Logarithm of normalised linear dependences for Higgs signal strength measurements, as in Fig.~\ref{fig:EWPO}. Dependences include effects in both production and decay.
002809469 8564_ $$82407606$$s41975$$uhttps://cds.cern.ch/record/2809469/files/diboson_indiv.png$$y00016 95\% CL individual limits from diboson measurements.
002809469 8564_ $$82407607$$s96137$$uhttps://cds.cern.ch/record/2809469/files/STXS_indiv.png$$y00018 95\% CL individual limits from Higgs STXS measurements.
002809469 8564_ $$82407608$$s11943$$uhttps://cds.cern.ch/record/2809469/files/simplifiedXS_VBF_1_2.png$$y00005 justification=centerlast : Schematic representation of STXS 1.2 bins for the electroweak production of the Higgs boson in association with two jets~\cite{lhcxwg}.
002809469 8564_ $$82407609$$s24634$$uhttps://cds.cern.ch/record/2809469/files/Coeffs_Bar_noVV.png$$y00021 Comparison of the magnitude of the 95\% CL bounds on the Wilson coefficients considered in the SMEFiT~\cite{Ethier:2021bye} analysis obtained in the global fit with those of fits to restricted datasets: a top-only, a Higgs-only, and a no-diboson fit.
002809469 8564_ $$82407610$$s20333$$uhttps://cds.cern.ch/record/2809469/files/obsO2.png$$y00002 : Caption not extracted
002809469 8564_ $$82407611$$s23704$$uhttps://cds.cern.ch/record/2809469/files/obsO1.png$$y00001 : Observables reconstructed in production of the on-shell Higgs boson in the $ZZ$ and $WW$ fusion: azimuthal angle between two associated jets $\Delta\Phi_\mathrm{JJ}$ (left); observable ${\cal R}_\mathrm{opt,2}$ optimized for the quadratic term $\theta_1^2$ (middle); observable ${\cal R}_\mathrm{opt,1}$ optimized for the linear term $\theta_1$ (right). Four distributions are shown: SM ($\theta_0$, black), $CP$-odd operator ($\theta_1$, red), and 50\% mixture with positive (green) and negative (blue) relative sign of $\theta_0$ and $\theta_1$. The study is inspired by Ref.~\cite{Gritsan:2020pib}.
002809469 8564_ $$82407612$$s24778$$uhttps://cds.cern.ch/record/2809469/files/Coeffs_Bar_Higgs_only.png$$y00020 Comparison of the magnitude of the 95\% CL bounds on the Wilson coefficients considered in the SMEFiT~\cite{Ethier:2021bye} analysis obtained in the global fit with those of fits to restricted datasets: a top-only, a Higgs-only, and a no-diboson fit.
002809469 8564_ $$82407613$$s55802$$uhttps://cds.cern.ch/record/2809469/files/diagram_templates.png$$y00006 justification=centerlast : The chain of MC modeling of probability density ${\cal P}(\vec{x}_\mathrm{reco}|\vec{\theta})$ as a function reconstructed observables $\vec{x}_\mathrm{reco}$ and EFT parameters $\vec{\theta}$ following Eq.~(\ref{eq:P}). An event generator produces LHE files for $N$ hypotheses $\vec\theta_i$, which are processed through full MC simulation, including parton shower and detector effects, and further re-weighted into $M$ hypotheses necessary for analytical morphing of template parameterization. The diagram is inspired by Ref.~\cite{CMS:2021nnc}.
002809469 8564_ $$82407614$$s24380$$uhttps://cds.cern.ch/record/2809469/files/Coeffs_Bar_Top_only.png$$y00019 Comparison of the magnitude of the 95\% CL bounds on the Wilson coefficients considered in the SMEFiT~\cite{Ethier:2021bye} analysis obtained in the global fit with those of fits to restricted datasets: a top-only, a Higgs-only, and a no-diboson fit.
002809469 8564_ $$82407615$$s39837$$uhttps://cds.cern.ch/record/2809469/files/EWPO_dependencies_log.png$$y00009 Logarithm of normalised linear dependences for electroweak measurements. The entries are normalised by dividing each one by the largest operator dependence of a given measurement, $a_{\mathrm{max}}^X$, such that the colour map depicts $\log( a_i^X /a_{\mathrm{max}}^X )$.
002809469 916__ $$sn$$w202219
002809469 980__ $$aLHCEFTWG
002809469 980__ $$aPREPRINT