Two Higgs doublets to explain the excesses pp → γγ(750 GeV) and h → τ ± μ ∓

Bizot, Nicolas; Davidson, Sacha; Frigerio, Michele; Kneur, Jean-Loïc

doi:10.1007/jhep03(2016)073

Cited by 50 publications

(16 citation statements)

References 80 publications

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“…[9], we show now some phenomenological results on HLFV in the type-III 2HDM. We refer to [31,34,42,46,47,53,56,72,76,78,87,89,124] for additional HLFV phenomenological studies in the 2HDM.…”

Section: Hlfv Phenomenologymentioning

confidence: 99%

Higgs Lepton Flavor Violating Decays in Two Higgs Doublet Models

Vicente

2019

Front. Phys.

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The discovery of a non-zero rate for a lepton flavor violating decay mode of the Higgs boson would definitely be an indication of New Physics. We review the prospects for such signal in Two Higgs Doublet Models, in particular for Higgs boson decays into τ µ final states. We will show that this scenario contains all the necessary ingredients to provide large flavor violating rates and still be compatible with the stringent limits from direct searches and low-energy flavor experiments.1

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Section: Hlfv Phenomenologymentioning

confidence: 99%

Higgs Lepton Flavor Violating Decays in Two Higgs Doublet Models

Vicente

2019

Front. Phys.

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“…If confirmed, this would be a clear signature of physics beyond the Standard Model, at the same level of the diphoton signal. There have been many works trying to explain this ∼ 1% signal, either using an EFT approach [53, 54,55] or focusing on a type III 2HDM [56,57,58,59,60,61] (also at loop level, see for instance an example in ref. [62]).…”

Section: Higgs Flavor Violation From the Georgi-jarlskog Modelmentioning

confidence: 99%

Phenomenology of SU(5) low-energy realizations: The diphoton excess and Higgs flavor violation

2016

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We discuss different SU(5) low-energy realizations and illustrate their use with the diphoton excess and Higgs flavor violation, which require new physics at the TeV scale. In particular, we study two scenarios for a 750 GeV resonance: in the first one the resonance belongs to the adjoint of SU(5), being either an SU(2)L singlet or a triplet, while in the second case the signal is due to the CP-even and CP-odd states of a new SU(2)L Higgs doublet belonging to a 45H or a 70H representations, giving rise to a two-Higgs doublet model at low energies. We study the fine-tuning needed for the desired members of the multiplets to be light enough, while having the rest at the GUT scale. In these scenarios, the production and decay into photons of the new resonance are mediated by the leptoquarks (LQ) present in these large SU(5) representations. We analyze the phenomenology of such scenarios, focusing on the most relevant predictions that can help to disentangle the different models, like decays into gauge bosons, Standard Model (SM) fermions and LQs pair production. In the case of the 45H (the Georgi–Jarlskog model), we also study the possibility to have Higgs flavor violation. We find that Bs mixing limits (in addition to τ→μγ) always imply that Br(h→τμ,bs)≲10−5

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“…Accordingly simple two Higgs doublet (or MSSM) extensions of the Standard Model, which could contain a resonance X near 750 GeV [10][11][12][13][14][15][16][17][18][19][20][21][22][23], require additional scalars or vector-like fermions whose loops generate the coupling of X to gluons and/or γγ (unless R-parity is broken [24,25]). Large Yukawa couplings are required for a sufficiently large cross section, which risk to generate new hierarchy problems/Landau singularities (unless compositeness is invoked).…”

Section: Jhep05(2016)114mentioning

confidence: 99%

A 750 GeV diphoton signal from a very light pseudoscalar in the NMSSM

Ellwanger

Hugonie

2016

J. High Energ. Phys.

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The excess of events in the diphoton final state near 750 GeV observed by ATLAS and CMS can be explained within the NMSSM near the R-symmetry limit. Both scalars beyond the Standard Model Higgs boson have masses near 750 GeV, mix strongly, and share sizeable production cross sections in association with b-quarks as well as branching fractions into a pair of very light pseudoscalars. Pseudoscalars with a mass of ∼ 210 MeV decay into collimated diphotons, whereas pseudoscalars with a mass of ∼ 500-550 MeV can decay either into collimated diphotons or into three π 0 resulting in collimated photon jets. Various such scenarios are discussed; the dominant constraints on the latter scenario originate from bounds on radiative Υ decays, but they allow for a signal cross section up to 6.7 fb times the acceptance for collimated multiphotons to pass as a single photon.

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Two Higgs doublets to explain the excesses pp → γγ(750 GeV) and h → τ ± μ ∓

Cited by 50 publications

References 80 publications

Higgs Lepton Flavor Violating Decays in Two Higgs Doublet Models

Higgs Lepton Flavor Violating Decays in Two Higgs Doublet Models

Phenomenology of SU(5) low-energy realizations: The diphoton excess and Higgs flavor violation

A 750 GeV diphoton signal from a very light pseudoscalar in the NMSSM

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