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Open AccessHolographic composite Higgs model building: soft breaking, maximal symmetry, and the Higgs mass
We study the emergence and phenomenological consequences of recently proposed new structures, namely soft breaking of the Higgs shift symmetry and ‘maximal symmetry’ of the composite sector, in holographic rea...
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Article
Open AccessSU(6) gauge-Higgs grand unification: minimal viable models and flavor
Gauge-Higgs grand unification theories are models of gauge-Higgs unification that extend the electroweak group into a simple group that includes the color symmetry. The minimal option is a gauge-Higgs grand un...
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Open AccessZ2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects
Simple scalar-singlet extensions of the Standard Model with a (spontaneously broken) Z2 symmetry allow for a strong first order electroweak phase transition, as sought in order to realize electroweak baryogenesis...
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Open AccessFlavour observables and composite dynamics: leptons
We review lepton flavor physics and corresponding observables in the composite Higgs framework with partial compositeness, considering ‘UV complete’ setups as well as effective and holographic approaches. This...
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Open AccessOn the reinterpretation of non-resonant searches for Higgs boson pairs
The detection of production of a pair of Higgs bosons before the end of LHC operation would be a clear evidence of New Physics (NP). As searches for non-resonant production of Higgs pairs are being designed it...
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Open AccessModel-independent constraints with extended dark matter EFT
We systematically explore the phenomenology of the recently proposed extended dark matter effective field theory (eDMeft), which allows for a consistent effective description of DM scenarios across different ener...
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Open AccessExtended dark matter EFT
Conventional approaches to describe dark matter phenomenology at collider and (in)direct detection experiments in the form of dark matter effective field theory or simplified models suffer in general from draw...
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Open AccessDi-jet/\(\mathbf {e}^{+}\mathbf {e}^{-}+\hbox {MET}\) to probe \(Z_2\)-odd mediators to the dark sector
We explore a scenario where dark matter (DM) couples to the Standard Model mainly via a scalar mediator \(\mathcal{S}\)S that is odd under a \(Z_2\)Z2 symmetry, leading to interesting collider signatures. In fact...
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Open AccessIndirect estimation of masses beyond collider reach — in EFT
We demonstrate how masses of new states, beyond direct experimental reach, could nevertheless be estimated in the framework of effective field theory (EFT), given broad assumptions on the underlying UV physics...
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Open AccessRecent \(\varvec{B}\) physics anomalies: a first hint for compositeness?
We scrutinize the recently further strengthened hints for new physics in semileptonic B-meson decays, focusing on the ‘clean’ ratios of branching fractions
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Open AccessPrecision Drell-Yan measurements at the LHC and implications for the diphoton excess
Precision measurements of the Drell-Yan (DY) cross sections at the LHC constrain new physics scenarios that involve new states with electroweak (EW) charges. We analyze these constraints and apply them to mode...
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Open AccessOn the validity of the effective field theory approach to SM precision tests
We discuss the conditions for an effective field theory (EFT) to give an adequate low-energy description of an underlying physics beyond the Standard Model (SM). Starting from the EFT where the SM is extended ...
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Open AccessIndirect constraints on the scalar di-photon resonance at the LHC
Motivated by the tantalizing excesses recently reported in the di-photon invariant mass spectrum at the LHC, we scrutinize some implications of scalar di-photon resonances in high energy proton-proton collisio...
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Open AccessHiggs pair production: choosing benchmarks with cluster analysis
New physics theories often depend on a large number of free parameters. The phenomenology they predict for fundamental physics processes is in some cases drastically affected by the precise value of those free...
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Open AccessA naturally light Higgs without light top partners
We demonstrate that the inclusion of a realistic lepton sector can relax significantly the upper bound on top partner masses in minimal composite Higgs models, induced by the lightness of the Higgs boson. To t...
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Open AccessHiggs boson pair production in the D = 6 extension of the SM
We derive the constraints that can be imposed on the dimension-6 effective theory extension of the Standard Model, using gluon fusion-initiated Higgs boson pair production at the LHC. We use a realistic analys...
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Open AccessAn explicit Z ′-boson explanation of the B → K ∗ μ + μ − anomaly
A global fit to the recent B → K ∗ μ + μ − data shows indications for a large new-physics contribution to the Wilson coefficient of ...
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Article
Higgs boson self-coupling measurements using ratios of cross sections
We consider the ratio of cross sections of double-to-single Higgs boson production at the Large Hadron Collider at 14 TeV. Since both processes possess similar higherorder corrections, leading to a cancellatio...
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Custodial leptons and Higgs decays
We study the effects of extended fermion sectors, respecting custodial symmetry, on Higgs production and decay. The resulting protection for the Z → b L
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Open AccessHiggs production in a warped extra dimension
Measurements of the Higgs-boson production cross section at the LHC are an important tool for studying electroweak symmetry breaking at the quantum level, since the main production mechanism gg → h is loop-suppre...
