Implications of LHC data on 125GeV Higgs-like boson for the Standard Model and its various extensions

Abstract

Recent data on 125 GeV Higgs-like boson at the LHC starts to constrain the electroweak symmetry breaking sector of the SM and its various extensions. If one imposes the local gauge symmetry of the Standard Model (SM) ($SU(3{)}_c\times SU(2{)}_L\times U(1{)}_Y$) to the SM and any possible new physics scenarios, the SM Higgs properties will be modified by intrinsically two different ways: by new physics either coupling directly to the SM Higgs boson $h$, or affecting indirectly the SM Higgs properties through the mixing of $h$ with a SM singlet scalar $s$. The models of two Higgs doublet, extra sequential and mirror fermions belong to the first category, whereas the models with a hidden sector dark matter, extra vector-like fermions and new charged vector bosons, which can enhance the diphoton rate of the SM Higgs-like resonance, belong to the second category. We perform a global fit to data in terms of the effective Lagrangian description of two interaction eigenstates of scalar bosons, a SM Higgs and a singlet scalar, and their mixing. This framework is more suitable to study singlet-extended scenarios discussed above compared to other approaches based on the Lagrangian of mass eigenstates. With fairly model-independent assumptions, the effective Lagrangian contains at most four free parameters still encompassing the majority of models in the literature. Interestingly, the SM gives the best fit if all data from ATLAS and CMS are used, whereas various singlet extensions can fit better to individual ATLAS or CMS data. Without further assumptions, an upper bound on the total width (or, non-standard branching ratio) is generically obtained. Furthermore, global fit based on our parameterization can be used to probe interactions of the singlet scalar if the singlet resides below $2m_W$.

43 pages, 9 figures (v2: typos corrected, references added)

References in corpus (25)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Evidence for the spin-0 nature of the Higgs boson using ATLAS data
• LHC Phenomenology of an Extended Standard Model with a Real Scalar Singlet
• Singlet Higgs Phenomenology and the Electroweak Phase Transition
• Light scalar at LHC: the Higgs or the dilaton?
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology
• Minimal Extension of the Standard Model Scalar Sector
• Global fit to Higgs signal strengths and couplings and implications for extended Higgs sectors
• Scale invariant extension of the standard model with strongly interacting hidden sector
• Singlet fermionic dark matter
• LHC HXSWG interim recommendations to explore the coupling structure of a Higgs-like particle
• A Light Dilaton in Walking Gauge Theories
• Phenomenology of a light scalar: the dilaton
• Constraining extra-fermion(s) from the Higgs boson data
• Coupling spans of the Higgs-like boson
• LHC Higgs Signatures from Extended Electroweak Gauge Symmetry
• Mass-degenerate Higgs bosons at 125 GeV in the Two-Higgs-Doublet Model
• 2HDM at the LHC - the story so far
• Higgs Couplings after the Discovery
• Distinguishing `Higgs' Spin Hypotheses using gamma gamma and WW* Decays
• H to Z gamma in Gauge-Higgs Unification
• Precision Higgs coupling measurements at the LHC through ratios of production cross sections
• Electroweak symmetry breaking and cold dark matter from hidden sector technicolor

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