Two-photon decays of scalar and pseudoscalar bosons in supersymmetry

Kalyniak, Pat; Bates, R. L.; Ng, John N.

doi:10.1103/physrevd.33.755

Cited by 27 publications

(27 citation statements)

References 17 publications

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“…What can still deviate, is the strength of the hγ γ interaction. This is attributed to the participation of the charged Higgs in the loop [32,[52][53][54][55]. The corresponding decay width is given by…”

Section: Higgs Signal Strengthsmentioning

confidence: 99%

High-scale validity of a two-Higgs-doublet scenario: metastability included

Chakrabarty

Mukhopadhyaya

2017

Eur. Phys. J. C

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We identify regions in a Type-II two-Higgsdoublet model which correspond to a metastable electroweak vacuum with lifetime larger than the age of the universe. We analyse scenarios which retain perturbative unitarity up to grand unification and Planck scales. Each point in the parameter space is restricted using data from the Large Hadron Collider (LHC) as well as flavour and precision electroweak constraints. We find that substantial regions of the parameter space are thus identified as corresponding to metastability, which complement the allowed regions for absolute stability, for top quark mass at the high as well as low end of its currently allowed range. Thus, a two-Higgs-doublet scenario with the electroweak vacuum, either stable or metastable, can sail through all the way up to the Planck scale without facing any contradiction.

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Section: Higgs Signal Strengthsmentioning

confidence: 99%

High-scale validity of a two-Higgs-doublet scenario: metastability included

Chakrabarty

Mukhopadhyaya

2017

Eur. Phys. J. C

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“…Let us note that in our model the Higgs-top quark coupling is very close to the SM expectation, i.e., a htt 1, since the mixing between the CP even neutral scalar fields ξ η and ξ χ is very suppressed, being the 126 GeV SM like Higgs boson mainly composed of the ξ η field. The dimensionless loop factors F 1/2 (ρ) and F 1 (ρ) for spin-1/2 and spin-1 particles in the loop, respectively are [190][191][192][193][194][195][196][197]:…”

Section: Higgs Diphoton Ratementioning

confidence: 99%

A 3-3-1 model with low scale seesaw mechanisms

2019

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We construct a viable 3-3-1 model with two SU (3)L scalar triplets, extended fermion and scalar spectrum, based on the T family symmetry and other auxiliary cyclic symmetries, whose spontaneous breaking yields the observed pattern of SM fermion mass spectrum and fermionic mixing parameters. In our model the SM quarks lighter than the top quark, get their masses from a low scale Universal seesaw mechanism, the SM charged lepton masses are produced by a Froggatt-Nielsen mechanism and the small light active neutrino masses are generated from an inverse seesaw mechanism. The model is consistent with the low energy SM fermion flavor data and successfully accommodates the current Higgs diphoton decay rate and predicts charged lepton flavor violating decays within the reach of the forthcoming experiments.

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“…yy a n d Z Z decays of Higgs b o s o~i s i n SUSY e v e n t s T h e yy and Z Z decays of tlie MSShl Higgs h o s o~l s lead t o a prornisi~ig riiethod for their ide~itificatiori a t I i a t l r o~~ colliders [16,24]. It is therefore natural t o study whether one can see these decay modes for Higgs bosons produced in SUSY events.…”

Section: B T Multiplicity In Susy Eventsmentioning

confidence: 99%

“…This is not surprising since, as discussed in Ref. (161, the contribution of the t-quark loop t o H , decay is strongly suppressed when t a n P is substantially larger than unity. This is essentially t h e reason why H p -+ yy signals are observable only when t a n p is close t o unity [16,24]. Since t a n @ = 1 maximizes this decay (remember we d o not allow for t a n p < I ) , we have computed this branching fraction for t h e smallest value of mH+ (162 GeV) allowed by Fig.…”

Section: B T Multiplicity In Susy Eventsmentioning

confidence: 99%

Supercollider signals from gluino and squark decays to Higgs bosons

et al. 1992

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If the mass of the charged Higgs boson of the minimal supersymmetric model (MSSM) is smaller than about 150 GeV, the branching fraction for heavy gluinos and left-handed squarks to cascade decay to the heavier Higgs bosons H h , H p , and H* of the MSSM may be as large as 50-60% for values of supersymmetric parameters consistent with experimental data. These decays, which have been assumed to be kinematically inaccessible in earlier analyses, can potentially lead to significant modification of the cross section for missing ET ( B T ) , same-sign dilepton, and multilepton events from squarks and gluinos. We find that the q T , same-sign dilepton, and trilepton production rates are relatively insensitive to low values of m~+ , so that these remain viable signals for the identification of gluinos and squarks at he Supercoliducting Super Collider or the CERN Large Hadron Collider. Finally, our exploratory study shows that substantial production of Hh and H , (H*) in gluino and squark pair events can lead to qT events with anomalously large numbers of b quarks ( r leptons). There also exist small regions of parameter space where the Hl and Hh may be identifiable via the presence of y y in qT events.

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Two-photon decays of scalar and pseudoscalar bosons in supersymmetry

Cited by 27 publications

References 17 publications

High-scale validity of a two-Higgs-doublet scenario: metastability included

High-scale validity of a two-Higgs-doublet scenario: metastability included

A 3-3-1 model with low scale seesaw mechanisms

Supercollider signals from gluino and squark decays to Higgs bosons

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