New Higgs signals induced by mirror fermion mixing effects

Cotti, U.; Díaz-Cruz, J. Lorenzo; Gaitán, Ricardo Torres; Gonzales, H.; Hernandez-Galeana, Albino

doi:10.1103/physrevd.66.015004

Cited by 20 publications

(9 citation statements)

References 28 publications

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“…[25], while the evaluation of the corresponding LFV Higgs decays was presented in [26]. Mixing of the SM fermions with other exotic fermions was also shown to be a possible source of LFV in the Higgs sector [27], resulting in BRs of the order 0.01-0.001 again, which could clearly be detectable too. Bounds on LFV Higgs decays at the Tevatron were reported by the CDF collaboration in [28].…”

Section: Slepton Mixing and Lfv In The Higgs Sectormentioning

confidence: 99%

Lepton Flavour Violating Heavy Higgs Decays Within the nuMSSM and Their Detection at the LHC

Diaz-Cruz,

Ghosh,

Moretti

2008

Preprint

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Within the νMSSM, a Minimal Supersymmetric neutrino See-saw Model, Lepton Flavour Violating Higgs couplings are strongly enhanced at large tan β ( > ∼ 30), which can lead to BR(H 0 /A 0 → τ µ) ≃ O(10 −4 ), for M H 0 /A 0 > ∼ 160 GeV. Enhancements on the production of Higgs bosons, through the gluon fusion mechanism, gg → H 0 /A 0 , and the associated production channel gg, qq → bbH 0 /A 0 , whose rates grow with tan β, as well as the mass degeneracy that occurs between the H 0 and A 0 states in this regime, also contribute to further the possibilities to detect a heavy Higgs signal into τ µ pairs. We show that the separation of τ µ Higgs events from the background at the upcoming CERN Large Hadron Collider could be done for Higgs masses up to about 600 GeV for 300 fb −1 of luminosity, for large tan β values. However, even with as little as 10 fb −1 one can probe H 0 /A 0 masses up to 400 GeV or so, if tan β = 60. Altogether, these processes then provide a new Higgs discovery mode as well as an independent test of flavour physics.

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Section: Slepton Mixing and Lfv In The Higgs Sectormentioning

confidence: 99%

Lepton Flavour Violating Heavy Higgs Decays Within the nuMSSM and Their Detection at the LHC

Diaz-Cruz,

Ghosh,

Moretti

2008

Preprint

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“…In the left-right model with mirror fermions (LRMM) [28,29], the right-handed (left-handed) components of mirror fermions transform as doublets (singlets) under the new SU(2) R . The SM fermions are singlets under the SU(2) R , whereas the right-handed mirrors fields are also singlets under SU(2) L .…”

Section: Left-right Mirror Modelmentioning

confidence: 99%

“…Within the LRMM the possibility to search for LFV Higgs interactions at LHC was studied in ref. [29].…”

Section: Yukawa Lagrangian and Fermion Mixingmentioning

confidence: 99%

Single top production via FCNC couplings at an $e^{-}e^{+}$ collider with center-of-mass energy $\sqrt{s}=240$ GeV

Arroyo-Ureña¹,

Díaz-Cruz²,

Gaitán³

et al. 2022

Preprint

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Aspects of top quark physics can be studied at a future Circular Electron-Positron Collider (CEPC). In particular, Flavor-Changing Neutral Current interactions (FCNC) of the top quark can be studied even with a center-ofmass energy from √ s m t to √ s = 240 GeV, through the production a single top quark in association with a charm quark, which can arise in several scenarios of new physics. We explore here this signal within the Left-Right Mirror Model, which is a Left-Right model that includes mirror fermions; this model is motivated as a possible solution to the strong CP problem and by its rich phenomenology. We find that for particular scenarios of the model parameters, which are in agreement with the most up-to-date experimental constraints, the signal coming from the process e + e − → V → tc (V = Z, Z ) provide a detectable signal and thus it can give evidence for FCNC interactions; in these scenarios the mass of a new neutral gauge boson can be as high as m Z = 7 TeV.

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“…This motivated a plethora of calculations in the framework of several SM extensions, such as theories with massive neutrinos, supersymmetric theories, etc. [54,[109][110][111][112][113]. (For more on LFV Higgs decays see also [114][115][116][117][118]).…”

Section: Lfv Higgs Decaysmentioning

confidence: 99%

The Higgs profile in the standard model and beyond

Díaz-Cruz¹

2019

Rev. Mex. Fís.

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We present a review of Higgs physics in the SM and beyond, including the tests of the Higgs boson properties that have been performed at LHC and have permitted to delineate its profile. After presenting the essential features of the BEH mechanism, and its implementation in the SM, we discuss how the Higgs mass limits developed over the years. These constraints in turn helped to classify the Higgs phenomenology (decays and production mechanisms), which provided the right direction to search for the Higgs particle, an enterprise that culminated with its discovery at LHC. So far, the constraints on the couplings of the Higgs particle, point towards a SM interpretation. However, the SM has open ends that suggest the need to look for extensions of the model. We discuss in general the connection of the Higgs sector with some new physics (e.g. supersymmetry, flavor and Dark matter), with special focus on a more flavored Higgs sector. Thus is realized in the most general 2HDM, and its textured version, which we study in general, and for its various limits, which contain distinctive flavor-violating signals that could be searched at current and future colliders.

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New Higgs signals induced by mirror fermion mixing effects

Cited by 20 publications

References 28 publications

Lepton Flavour Violating Heavy Higgs Decays Within the nuMSSM and Their Detection at the LHC

Lepton Flavour Violating Heavy Higgs Decays Within the nuMSSM and Their Detection at the LHC

Single top production via FCNC couplings at an $e^{-}e^{+}$ collider with center-of-mass energy $\sqrt{s}=240$ GeV

The Higgs profile in the standard model and beyond

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