Can the 125 GeV Higgs be the Little Higgs?

Abstract

After the discovery of the Higgs-like boson by the LHC 2012 it is the most important task to check whether this new particle is the Standard Model Higgs boson or something else. In this paper, we study whether the 125 GeV boson could be the pseudo-Goldstone boson of Little Higgs models. We derive limits on the parameter space of several Little Higgs models (simple group and product group models, with and without T-parity), both from the experimental data from ATLAS and CMS about the different Higgs discovery channel and the electroweak precision observables. We perform a fit of several Little Higgs models to all electroweak parameters from measurements of SLC, LEP, Tevatron, and LHC. For the Higgs searches, we include all available data from the summer conferences in 2012 as well as the updates from December 2012. We show that there always exists a region in the parameter space of the models under consideration where the measured chi^2 is equal or lower than the SM chi^2: a closer look at the minimum chi^2 will however reveal that the agreement with the collected data is not significantly better as within the SM. While for the models without T-parity the Little Higgs scale f is forced to be of the order 2-4 TeV in order to be compatible with the collected data, in the models with T-parity the scale f is constrained to be only above O(500) GeV, reducing the amount of fine-tuning. We also show that these results are still driven by the electroweak precision measurements due to the bigger LHC data

arXiv comment40 pages, 6 figures

References in corpus (21)

• Electroweak symmetry breaking from dimensional deconstruction
• The Littlest Higgs
• Little Higgs Review
• TeV Symmetry and the Little Hierarchy Problem
• Little Hierarchy, Little Higgses, and a Little Symmetry
• Little Higgs Models and Their Phenomenology
• Model-Independent Bounds on a Light Higgs
• Electroweak Precision Constraints on the Littlest Higgs Model with T Parity
• The Little Higgs from a Simple Group
• Fingerprinting Higgs Suspects at the LHC
• The Simplest Little Higgs
• First Glimpses at Higgs' face
• Higgs Low-Energy Theorem (and its corrections) in Composite Models
• Higgs Boson Production and Decay in Little Higgs Models with T-parity
• Smoking-gun signatures of little Higgs models
• A Fermionic Top Partner: Naturalness and the LHC
• Electroweak Symmetry Breaking and the Higgs Boson: Confronting Theories at Colliders
• Gluon-fusion Higgs production at NNLO for a non-standard Higgs sector
• Lepton flavor violation in the Simplest Little Higgs model
• Exploring the heavy quark sector of the Bestest Little Higgs model at the LHC
• T-Quarks at the Large Hadron Collider: 2010-12

Cited by in corpus (42)

• Composite Higgses
• Higgs Precision (Higgcision) Era begins
• Pair Production of a 125 GeV Higgs Boson in MSSM and NMSSM at the LHC
• Alternatives to an Elementary Higgs
• Littlest Higgs with T-parity: Status and Prospects
• Little Higgs theory confronted with the LHC Higgs data
• The Z+photon and diphoton decays of the Higgs boson as a joint probe of low energy SUSY models at LHC
• Status of the aligned two-Higgs-doublet model confronted with the Higgs data
• Top Partner Discovery in the $T\to tZ$ channel at the LHC
• Resonances at the LHC beyond the Higgs: The Scalar/Tensor Case
• Precision Higgs Measurements: Constraints from New Oblique Corrections
• Lepton flavor violating Higgs decay $h\to \mu \tau$ in the littlest Higgs Model with T-parity
• Top Quark FCNC Decay to 125GeV Higgs boson in the Littlest Higgs Model with T-parity
• $H\to \ell {\ell }^{\prime }$ in the Simplest Little Higgs Model
• Dark matter in little Higgs model under current experimental constraints from LHC, Planck and Xenon
• Higgs couplings and Naturalness in the littlest Higgs model with T-parity at the LHC and TLEP
• Anomalous magnetic and weak magnetic dipole moments of the $\tau$ lepton in the simplest little Higgs model
• Constraining the Little Higgs model of Schmaltz, Stolarski, and Thaler with recent results from the LHC
• LHC diphoton and Z+photon Higgs signals in the Higgs triplet model with Y=0
• Status and Prospects of the Two-Higgs-Doublet SU(6)/Sp(6) little-Higgs Model and the Alignment Limit
• Implications of the Little Higgs Dark Matter and T-odd Fermions
• Lepton Flavour Violation in Hadron Decays of the Tau Lepton in the Simplest Little Higgs Model
• The fate of the Littlest Higgs Model with T-parity under 13 TeV LHC Data
• Higgs-Precision Constraints on Colored Naturalness
• Left-right twin Higgs model confronted with the latest LHC Higgs data
• Single Higgs boson production at $e^{+}{e}^{-}$ colliders in the Littlest Higgs Model with T-parity
• Spontaneous CP-violation in the Simplest Little Higgs Model and its Future Collider Tests: the Scalar Sector
• The $Z_H\to \gamma H$ decay in the Littlest Higgs Model
• Production and decays of a light ${\varphi }^0$ in the LRTH model under the LHC Higgs data
• Darkening the Little Higgs
• Charged Higgs Production in Association With W^{\pm} at Large Hadron Colliders
• Phenomenology of A Little Higgs Pseudo-Axion
• Simplest Little Higgs Revisited: Hidden Mass Relation, Unitarity and Naturalness
• Little Higgs Dark Matter after PandaX-II/LUX 2016 and LHC Run-1
• Probing the littlest Higgs model with $T$ parity using di-Higgs events through $Z_H$-pair production at the LHC in NLO QCD
• Heavy neutral pseudoscalar decays into gauge bosons in the Littlest Higgs Model
• One-loop QCD correction to top pair production in the littlest Higgs model with T-parity at the LHC
• Heavy neutral scalar decays into electroweak gauge bosons in the Littlest Higgs Model
• $Z_H\to H^0\gamma$ decay within the littlest Higgs model at $\mathcal{O}({\alpha }_{\mathrm{ew}}^3{\alpha }_s)$ accuracy
• Using the Higgs boson to probe the littlest Higgs model with T-parity through $Z_H{W}_H$ production at the LHC
• $HZ$ associated production at the LHC within the littlest Higgs model at NLO+NLL accuracy
• Rare Higgs three body decay induced by top-Higgs FCNC coupling in the littlest Higgs Model with T-parity