Funnel annihilations of light dark matter and the invisible decay of the Higgs boson

The prediction of additional Higgs bosons is one of the key features of physics beyond the Standard Model (SM) that gives rise to an extended Higgs sector. We assess the sensitivity of the Large Hadron Collider (LHC) in the high luminosity (HL) run alone and in combination with a possible future International Linear Collider (ILC) to probe heavy neutral Higgs bosons. We employ the Minimal Supersymmetric Standard Model (MSSM) as a framework and assume the light $$\mathcal {CP}$$ CP -even MSSM Higgs boson to be the Higgs boson observed at $$125\,\mathrm{GeV}$$ 125 GeV . We discuss the constraints on the MSSM parameter space arising from the precision measurements of the rates of the detected signal at $$125\,\mathrm{GeV}$$ 125 GeV and from direct searches for new heavy Higgs bosons in the $$\tau ^+\tau ^-$$ τ + τ - , $$b\bar{b}$$ b b ¯ and di-Higgs (hh) final states. A new benchmark scenario for heavy Higgs searches in the $$b\bar{b}$$ b b ¯ channel is proposed in this context. For the future Higgs rate measurements at the HL-LHC and ILC two different scenarios are investigated, namely the case where the future rate measurements agree with the SM prediction and the case where the rates agree with the predictions of possible realizations of the MSSM Higgs sector in nature.

show abstract

“…[15] for the HL-LHC prospects, and Refs. [120,[128][129][130][131] for recent studies of SUSY models in the context of dark matter).…”

Section: Sensitivity Of the Hl-lhcmentioning

confidence: 99%

HL-LHC and ILC sensitivities in the hunt for heavy Higgs bosons

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In our proposed solution, DM annihilation takes place via s-channel mediated by light Higgs scalars giving a pair of fermions in the final state [70][71][72],…”

Section: The Nmssm Model and Dark Matter Relic Densitymentioning

confidence: 99%

Light singlino dark matter at the LHC

Guchait

2020

Phys. Rev. D

View full text Add to dashboard Cite

The light singlinolike neutralino is expected to be a promising candidate for dark matter (DM) in the allowed parameter space of the next-to-minimal supersymmetric standard model. The DM annihilation process takes place via the light Higgs bosons which are natural in this model. Identifying the allowed region of parameter space including various constraints, the detection prospect of such light DM candidate and Higgs bosons are explored at the LHC with its high luminosity options. Light Higgs bosons and the DM candidate, the lightest singlinolike neutralino are indirectly produced at the LHC via the SM Higgs production and its subsequent decays. Jet substructure techniques are used to tag boosted Higgs. It is found that the favorable range of masses of Higgs bosons and neutralino, compatible with a low mass DM solution, can be discovered with a reasonable signal significance (∼5σ) at the LHC, with the center of mass energy ffiffi ffi s p ¼ 14 TeV and integrated luminosity options L ¼ 300 fb −1 and 3000 fb −1 .

show abstract

“…• We had performed a work on the annihilating mechanisms of light dark matter in this scenario [93], where we found that all the samples have the LSP in funnel mechanisms. When the LSP is lighter than 20 GeV, it is in h 1 -or a 1 -funnel mechanism, that is 2mχ0…”

Section: Jhep06(2020)078mentioning

confidence: 99%

A novel scenario in the semi-constrained NMSSM

Wang

Zhu

2020

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

In this work, we develop a novel efficient scan method, combining the Heuristically Search (HS) and the Generative Adversarial Network (GAN), where the HS can shift marginal samples to perfect samples, and the GAN can generate a huge amount of recommended samples from noise in a short time. With this efficient method, we find a new scenario in the semi-constrained Next-to Minimal Supersymmetric Standard Model (scNMSSM), or NMSSM with non-universal Higgs masses. In this scenario, (i) Both muon g-2 and right relic density can be satisfied, along with the high mass bound of gluino, etc. As far as we know, that had not been realized in the scNMSSM before this work. (ii) With the right relic density, the lightest neutralinos are singlino-dominated, and can be as light as 0-12 GeV. (iii) The future direct detections XENONnT and LUX-ZEPLIN (LZ-7 2T) can give strong constraints to this scenario. (iv) The current indirect constraints to Higgs invisible decay h 2 →χ 0 1χ 0 1 are weak, but the direct detection of Higgs invisible decay at the future HL-LHC may cover half of the samples, and that of the CEPC may cover most. (v) The branching ratio of Higgs exotic decay h 2 → h 1 h 1 , a 1 a 1 can be over 20 percent, while their contributions (h 2 → 4χ 0 1 ) to the invisible decay are very small.

show abstract

Funnel annihilations of light dark matter and the invisible decay of the Higgs boson

Cited by 22 publications

References 126 publications

HL-LHC and ILC sensitivities in the hunt for heavy Higgs bosons

HL-LHC and ILC sensitivities in the hunt for heavy Higgs bosons

Light singlino dark matter at the LHC

A novel scenario in the semi-constrained NMSSM

Contact Info

Product

Resources

About