Search for invisible decays of the Higgs boson at the ILC

Ishikawa, A.

doi:10.22323/1.367.0147

Cited by 7 publications

(7 citation statements)

References 9 publications

(9 reference statements)

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“…where we have used Γ total h ≈ 4 MeV and Γ total Z ≈ 2.49 GeV [74]. Unfortunately, these numbers are so small that it is not feasible that they will be tested at any current or future facilities [75].…”

Section: Some Phenomenological Implicationsmentioning

confidence: 99%

One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment

Chala

Titov

2020

J. High Energ. Phys.

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We compute the one-loop running of the dimension-six CP-even Higgs operators in the Standard Model effective field theory involving the right-handed component of the would-be Dirac neutrinos. Then, on the basis of naturalness arguments, for some operators we obtain bounds that surpass direct constraints by orders of magnitude. We also discuss the implications of a large Dirac neutrino magnetic dipole moment. In particular, we demonstrate that a neutrino magnetic moment explaining the recent XENON1T excess induces Higgs and Z invisible decays with branching ratios in the range [10−18, 10−12]. These numbers are unfortunately beyond the reach of current and near future facilities.

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Section: Some Phenomenological Implicationsmentioning

confidence: 99%

One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment

Chala

Titov

2020

J. High Energ. Phys.

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“…31 GeV, the branching ratio of Higgs invisible decay increase very little compared with only that h 2 decay to twoχ 0 1 though h 2 →χ 0 1χ 0 1 . The upper limit of Higgs invisible decay branching ratio is about 19% at Run II of the LHC, while the future detections for that can reach to 5.6%, 0.24%, 0.5% and 0.26% according to HL-LHC [89], CEPC [90], FCC [91] and ILC [92] 1 . In the left panel, the black dashed, dash-dotted and dotted lines indicate the Higgs invisible decay upper limit from the current LHC 19% [7], future HL-LHC 5.6% [89], and CEPC 0.24% [90] respectively.…”

Section: Jhep06(2020)078mentioning

confidence: 99%

A novel scenario in the semi-constrained NMSSM

Wang

Zhu

2020

J. High Energ. Phys.

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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.

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“…[47], and it will be updated to Br(h → inv.) ≤ 0.0026 if we still do not observe the signals at future lepton colliders such as the international linear collider (ILC) [48]. On the other hand, as seen in eq.…”

Section: Higgs Productionmentioning

confidence: 90%

A Global Analysis of Resonance-enhanced Light Scalar Dark Matter

Binder¹,

Chakraborti²,

Matsumoto³

et al. 2022

Preprint

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We study a minimal model for a light scalar dark matter, requiring a light scalar mediator to address the core-cusp problem and interact with the standard model particles. We analyze the model comprehensively by focusing on the Breit-Wigner resonance for dark matter annihilation and self-scattering channels, considering the thermal relic abundance condition that includes the early kinetic decoupling effect, as well as the present and future constraints from collider, direct, and indirect dark matter detections. We found that the scalar dark matter with the mass of 0.3-2 GeV remains uncharted, which will be efficiently tested by the near future MeV gamma-ray observations.

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Search for invisible decays of the Higgs boson at the ILC

Cited by 7 publications

References 9 publications

One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment

One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment

A novel scenario in the semi-constrained NMSSM

A Global Analysis of Resonance-enhanced Light Scalar Dark Matter

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