Fermionic decay of charged Higgs boson in low mass region in Georgi Machacek Model

Ghosh, Swagata

doi:10.48550/arxiv.2205.03896

Cited by 2 publications

(3 citation statements)

References 42 publications

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“…Various phenomenological works [17][18][19][20][21][22][23][24][25][26][27][28][29] on this model enrich the knowledge of the reader. [30][31][32] explores the decay of the CP-odd singly charged Higgs boson, but the channel probed in this letter, first described in the paper of CMS experiment [33], is still untouched in the literature for the GM model.…”

Section: Introductionmentioning

confidence: 99%

Charged Higgs boson searches in the Georgi-Machacek model at the LHC

Ghosh

Saha

2020

Phys. Rev. D

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The Georgi-Machacek Model allows for a large triplet vacuum expectation value (vev) with a custodial symmetric scalar potential. This manifestly leads to large charged Higgs coupling to SM fermions thus enhancing the detection probability of the model at the hadron collider. We show that the latest bound from LHC searches on charged Higgs scalar decaying to top and bottom quark restricts the triplet vev from above. We demonstrate that the combined limit from theoretical constraints and the latest Higgs data together with this charged Higgs bound can already curb the model parameter space significantly. Further, we propose the charged Higgs decaying to W ± boson and a SM-like Higgs as a prospective channel to probe the yet unbounded model parameter space at the future run of the LHC.

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Section: Introductionmentioning

confidence: 99%

Charged Higgs boson searches in the Georgi-Machacek model at the LHC

Ghosh

Saha

2020

Phys. Rev. D

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“…The remaining parameter space exhibits sizeable deviations in the 125 GeV Higgs couplings, particularly in λ γV ≡ κ γ /κ V , which is suppressed by 15-40% compared to its SM value. It also restricts S to be lighter than about 175 GeV, which could be probed by a future e + e − collider. We show that the addition of the projected HL-LHC measurements of the 125 GeV Higgs couplings will completely exclude the model at more than the 5σ level, assuming that no deviation from the SM is found.…”

Section: Discussionmentioning

confidence: 99%

“…Updated LHC analyses[172][173][174] of charged Higgs production in top quark decays that have not yet been included in HiggsBounds were shown in Ref [175]. to exclude ν χ values as low as 10 GeV for m 3 between 90 and 130 GeV.…”

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confidence: 99%

Exploring New Frontiers in Particle Physics: Extended Higgs Sectors, Dark Matter, and Neutrino Masses

de Lima

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This thesis explores four research projects in particle physics that aims in enhancing our understanding of the universe's fundamental particles and forces.The first part examines the Georgi-Machacek (GM) model, which expands the Standard Model (SM) scalar sector by including two SU (2) L triplets. We conduct a comprehensive analysis of the experimental status of this model. Our findings establish an experimental lower limit on the triplet vacuum expectation value that affects deviations from the SM in the Higgs boson's tree-level couplings.The second part explores breaking CP in a dark sector consisting of SM gauge singlets. We conduct a two-loop calculation in the effective theory, with the dark sector interacting with the SM sector via a vector Z portal and Higgs portal. Our findings demonstrate that collider constraints from B-factories exclude feasible baryogenesis for Z masses under 10 GeV. Additionally, future electron-positron Higgs factories may test the viable baryogenesis parameter space.The third part examines the Sommerfeld enhancement for scattering amplitudes. We create a straightforward method to remove divergences in the narrowwidth approximation, which applies in the near-threshold region and considers only the resonant contribution. Our approach offers a good approximation for the exact outcome and has the potential for exploring dark matter models featuring unstable states.Lastly, we investigate generating neutrino masses from the gravitational θ anomaly.The neutrino condensate's primary renormalizable interactions restrict the possibility of producing hierarchical masses compatible with observation, even when accounting for SM loop corrections. Higher-dimensional operators can alleviate this issue. We examine the potential of new particles to create neutrino mass splittings. Our findi nism was computed by Dr. Yue Zhang.

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Fermionic decay of charged Higgs boson in low mass region in Georgi Machacek Model

Cited by 2 publications

References 42 publications

Charged Higgs boson searches in the Georgi-Machacek model at the LHC

Charged Higgs boson searches in the Georgi-Machacek model at the LHC

Exploring New Frontiers in Particle Physics: Extended Higgs Sectors, Dark Matter, and Neutrino Masses

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