Higgs boson from an extended symmetry

By R. Barbieri, B. Bellazzini, V. Rychkov, Alvise Varagnolo. 2007

252 citations recorded by the source corpus.

The variety of ideas put forward in the context of a composite picture for the Higgs boson calls for a simple and effective description of the related phenomenology. Such a description is given here by means of a minimal model and is explicitly applied to the example of a Higgs-top sector from an $SO(5)$ symmetry. We discuss the spectrum, the electroweak precision tests, B-physics, and naturalness. We show the difficulty in complying with the different constraints. The extended gauge sector relative to the standard $SU(2)\ifmmode\times\else\texttimes\fi{}U(1)$, if there is any, has little or no impact on these considerations. We also discuss the relation of the minimal model with its ``little Higgs'' or holographic extensions based on the same symmetry.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/a86ae40ae442c9c68d77657d37a218748ad8d119

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In Nuclear and High Energy Physics

Citations in the corpus

Renormalization group scaling of Higgs operators and h → γγ decay (2013, methodology): “ect we want to compute can dominate over the new physics contribution at the matching scale. Similar RGE enhancement is present in the mixing between the operators OWB and – 10 – ∂µ|H|2∂µ|H|2 in Ref. [20] and has been used to derive some bounds on the deviations of the Higgs couplings to massive gau”
Electroweak precision observables, new physics and the nature of a 126 GeV Higgs boson (2013, methodology): “ EW corrections to ˆf Z . When using ref. [16,83], we do not impose constraints from Z, ˙0 h and R 0 ‘ . the non-standard coupling a 6= 1. This generates extra contributions to the S and T parameters [119]: S= 1 12ˇ (1 a2)ln 2 m2 h ; (3.19) T = 3 16ˇc 2 W (1 a2)ln 2 m h ; (3.20) where = 4 ˇv= p ”
Twin Higgs mechanism and a composite Higgs boson (2015, background): “Another indirect constraint – which is rather model independent – comes from the IRlogarithms in the S and T parameters of the electroweak precision tests [38].”
The 4D composite Higgs (2011, unknown): “tation of SO(4), appropriate for the Higgs boson. The breaking can be parametrized by the VEV of a vector of SO(5) so that the gauge lagrangian (5) can be 2A two site description can be also found in [19]. Our gauge sector is similar to the one described in section 6.2 of that work with the scale Fk”
Composite Higgs boson pair production at the LHC (2010, background): “They are hence both logarithmically divergent [ 51 ].”
The Composite Nambu-Goldstone Higgs (2015, background): “One can notice that a strict relation exists between the two quantities: ∆T̂ = 3 δgbL [170, 216, 223].”
Discovering the top partners at the LHC using same-sign dilepton final states (2008, background): “(10)The case where T5/3 is much lighter than B is disfavored by electroweak precision data [24].”
Effective Lagrangian for a light Higgs-like scalar (2013, background): “It is well known that this RG running is associated with the IR contribution to the 3 parameter, and the same coefficient γ (0) W+B,H = −1/6 can indeed be extracted from self-energy diagrams [80].”
Light top partners and precision physics (2013, background): “The leading contribution due to the non-linear Higgs dynamics is given by [47]”