Constraining new physics from Higgs measurements with Lilith: update to LHC Run 2 results

Abstract

Lilith is a public Python library for constraining new physics from Higgs signal strength measurements. We here present version 2.0 of Lilith together with an updated XML database which includes the current ATLAS and CMS Run 2 Higgs results for 36/fb. Both the code and the database were extended from the ordinary Gaussian approximation employed in Lilith-1.1 to using variable Gaussian and Poisson likelihoods. Moreover, Lilith can now make use of correlation matrices of arbitrary dimension. We provide detailed validations of the implemented experimental results as well as a status of global fits for reduced Higgs couplings, Two-Higgs-doublet models of Type I and Type II, and invisible Higgs decays. Lilith-2.0 is available on GitHub and ready to be used to constrain a wide class of new physics scenarios.

28 pages, 15 figures, 4 tables. Three ATLAS results added and all fit results updated accordingly (database version is now 19.09); comments on assumptions and accurracies of SM predictions slightly expanded; some references added

References in corpus (10)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Parton distributions for the LHC
• Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at sqrt(s) = 13 TeV
• Combination of searches for invisible Higgs boson decays with the ATLAS experiment
• Evidence for the $H\to b\bar{b}$ decay with the ATLAS detector
• The Gauge-Higgs Legacy of the LHC Run II
• tWH associated production at the LHC
• Search for an invisibly decaying Higgs boson or dark matter candidates produced in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• Status of Higgs couplings after Run-1 of the LHC using Lilith 1.0
• Measurement of the production cross section for a Higgs boson in association with a vector boson in the $H\to W{W}^{\ast }\to \ell \nu \ell \nu$ channel in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

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• Leptoquarks in Oblique Corrections and Higgs Signal Strength: Status and Prospects
• Dark matter, electroweak phase transition and gravitational wave in the type-II two-Higgs-doublet model with a singlet scalar field
• Top-philic heavy resonances in four-top final states and their EFT interpretation
• Exploring sizable triple Higgs couplings in the 2HDM
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• Phase transition gravitational waves from pseudo-Nambu-Goldstone dark matter and two Higgs doublets
• Triple Higgs Couplings in the 2HDM: The Complete Picture
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• One-loop radiative corrections to $e^{+}{e}^{-}\to Z{h}^0/H^0{A}^0$ in the Inert Higgs Doublet Model
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• To Profile or To Marginalize -- A SMEFT Case Study
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• A Final Word on FCNC-Baryogenesis from Two Higgs Doublets
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• Tests of gluino-driven radiative breaking of the electroweak symmetry at the LHC
• Relations between $b\to c\tau \nu$ Decay Modes in Scalar Models
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• Boosting Beyond: A Novel Approach to Probing Top-Philic Resonances at the LHC
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• From Models to SMEFT and Back?
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