New resonance scale and fingerprint identification in minimal composite Higgs models

Kanemura, Shinya; Kaneta, Kunio; Machida, Naoki; Shindou, Tetsuo

doi:10.48550/arxiv.1410.8413

Cited by 4 publications

(4 citation statements)

References 35 publications

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“…Since the top quark is responsible for the mass of the Higgs, this results in a relationship between the Higgs mass and the mass of the lightest top partner. In general, a significant amount of tuning is required to lift the top partner mass much higher than a TeV [9] (for further developments in CH model-building see [10][11][12][13][14][15][16][17][18][19][20][21]; for a discussion of CH phenomenology [22][23][24][25][26][27][28][29][30][31][32][33] and searches for top-partners [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]). In this paper we present a model that provides an entirely different means for the Higgs to acquire a negative mass-squared.…”

Section: Intoductionmentioning

confidence: 99%

Composite Higgses with seesaw EWSB

Sanz

Setford

2015

J. High Energ. Phys.

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We introduce a new class of Composite Higgs models in which electroweak symmetry is broken by a seesaw-like mechanism. If a global symmetry is broken sequentially at different scales, two sets of pseudo-Goldstone bosons will arise, one set being typically heavier than the other. If two Composite Higgs doublets mix, then the mass-squared of the lighter state can be driven negative, and induce EWSB. We illustrate with the example $SO(6) \rightarrow SO(5) \rightarrow SO(4)$, and derive an estimate of the light Higgs potential. We find that the introduction of an extra scale can ease many of the tensions present in conventional Composite Higgs models, especially those related to fine-tuning. In particular we find that we can significantly raise the upper bound on the mass of the elusive top partners.Comment: 19 pages, 2 figures. v2: JHEP version, mistake corrected, discussion on tuning and top-partners extende

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Section: Intoductionmentioning

confidence: 99%

Composite Higgses with seesaw EWSB

Sanz

Setford

2015

J. High Energ. Phys.

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“…With the future precision data, one can fingerprint the various Higgs boson couplings by comparing the future data with precise theoretical predictions calculated by using H-COUP 1.0, and identify the Higgs sector as discussed in Refs. [25,[44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

H-COUP: A program for one-loop corrected Higgs boson couplings in non-minimal Higgs sectors

Kanemura

Kikuchi

Sakurai

et al. 2018

Computer Physics Communications

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We present the concept of H-COUP 2.0, a a fortran program for numerical evaluation of decay rates of the Higgs boson with a mass of 125 GeV and the decay width with higher order corrections (next to leading order (NLO) for electroweak and scalar loop corrections, and next to NLO for QCD corrections) in the Higgs singlet model, four types of two Higgs doublet models with a softly-broken Z 2 symmetry and the inert doublet model. In the previous version (H-COUP 1.0), only a full set of the Higgs boson vertices are evaluated at one-loop level in a gauge invariant manner in these models. H-COUP 2.0 contains all the functions of H-COUP 1.0. After shortly introducing these extended Higgs models and discussing their theoretical and experimental constraints, we summarize formulae for the renormalized vertices and the decay rates. We then explain how to install and run H-COUP 2.0 with some numerical examples.

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“…Typically top partners below about 700 GeV are required, and this is already in tension with bounds on vector-like quarks at the LHC [49,50] which, for single channel final states, already reach 900 GeV. For specific information on top partner phenomenology we refer the reader to [51][52][53][54][55][56][57][58][59][60][61][62][63] and for general LHC phenomenology of the MCHM to [64][65][66][67][68][69][70][71][72][73][74][75].…”

Section: Introductionmentioning

confidence: 99%

Exploring holographic Composite Higgs models

Croon

Huber

Sanz

2016

J. High Energ. Phys.

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Simple Composite Higgs models predict new vector-like fermions not too far from the electroweak scale, yet LHC limits are now sensitive to the TeV scale. Motivated by this tension, we explore the holographic dual of the minimal model, MCHM 5 , to try and alleviate this tension without increasing the fine-tuning in the Higgs potential. Interestingly, we find that lowering the UV cutoff in the 5D picture allows for heavier top partners and less fine-tuning. In the 4D dual this corresponds to increasing the number of "colours" N , thus increasing the decay constant of the Goldstone Higgs. This is essentially a 'Little Randall-Sundrum Model', which are known to reduce some flavour and electroweak constraints. Furthermore, in anticipation of the ongoing efforts at the LHC to put bounds on the top Yukawa, we demonstrate that deviations from the SM can be suppressed or enhanced with respect to what is expected from mere symmetry arguments in 4D. We conclude that the 5D holographic realisation of the MCHM 5 with a small UV cutoff is not in tension with the current experimental data.

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New resonance scale and fingerprint identification in minimal composite Higgs models

Cited by 4 publications

References 35 publications

Composite Higgses with seesaw EWSB

Composite Higgses with seesaw EWSB

H-COUP: A program for one-loop corrected Higgs boson couplings in non-minimal Higgs sectors

Exploring holographic Composite Higgs models

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