Search for invisible decays of the Higgs boson produced at the CEPC *

Tan, Yuhang; Shi, X.; Kiuchi, R.; Ruan, M.; Jing, M. Q.; Yu, Dan; Zhang, Kai; Lou, X.; Mo, X. H.; Li, Gang; Jyotishmati, Susmita

doi:10.1088/1674-1137/abb4d8

Cited by 15 publications

(10 citation statements)

References 14 publications

(16 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

See 1 more Smart Citation

A novel scenario in the semi-constrained NMSSM

Wang

Zhu

2020

J. High Energ. Phys.

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

Section: Jhep06(2020)078mentioning

confidence: 99%

“…Colors indicate the singlino component |N 15 | 2 in the LSPχ 01 . 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. Samples with smaller |N 15 | 2 are projected on top of the larger ones.…”

mentioning

confidence: 99%

A novel scenario in the semi-constrained NMSSM

Wang

Zhu

2020

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…Multiple proposed next generation collider experiments are expected to tighten the bound on the invisible BR by up to two orders of magnitude to BR (h → Inv.) = 0.22% (FCC-ee) [59], 0.24% (CEPC) [60] and 0.26% (ILC) [61]. The corresponding bound on the DM mass would read approximately…”

Section: Jhep09(2022)101mentioning

confidence: 96%

Freeze-In of radiative keV-scale neutrino dark matter from a new U(1)B-L

Berbig

2022

J. High Energ. Phys.

View full text Add to dashboard Cite

We extend the Dirac Scotogenic model with the aim of realizing neutrino masses together with the mass of a keV-scale dark matter (DM) candidate via the same one-loop topology. Two of the Standard Model (SM) neutrinos become massive Dirac fermions while the third one remains massless. Our particle content is motivated by an anomaly free U(1) B-L gauge symmetry with exotic irrational charges and we need to enforce an additional Z 5 symmetry. The dark matter candidate does not mix with the active neutrinos and does not have any decay modes to SM particles. DM is produced together with dark radiation in the form of right handed neutrinos via out of equilibrium annihilations of the SM fermions mediated by the heavy B-L gauge boson. In order to avoid DM over-production from Higgs decays and to comply with Lyman-α bounds we work in a low temperature reheating scenario with 4 MeV T RH 5 GeV. Our setup predicts a contribution to ∆N eff. that decreases for larger DM masses and is below the sensitivity of upcoming precision measurements such as CMB-S4. A future observation of a signal with ∆N eff.0.012 would exclude our scenario. We further sketch how inflation, reheating and Affleck-Dine baryogenesis can also be potentially realized in this unified framework.

show abstract

“…The measurement potential of Higgs decay to an invisible channel on CEPC is investigated [9]. In SM, the Higgs boson can only decay invisibly via H → ZZ * → νννν or dark matter, so any evidence of invisible Higgs decay that exceeds BR (H → inv.)…”

Section: H → Invisible Channelmentioning

confidence: 99%

CEPC Research Report: Higgs Physics Analysis

Ruan,

Fang,

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

In November 2018, the CEPC released the Conceptual Design Report (CDR) with the physics potential investigation and the analysis about different detector concepts. Since then, intensive researches on the Higgs Physics at the CEPC have been progressed. The run at top thresholds are also taken into consideration and the physics potential around the center-of-mass energy of 360GeV is studied. The ttH channel information boost the precision of Higgs width measurement by a factor of 2 with respect to 240 GeV Higgs Runs. Different Higgs decay modes are analyzed in the CEPC Higgs factory at the center-of-mass energy of 240GeV, including Higgs to b/c/g and Higgs to τ τ , which improves the Higgs measurement. Advanced analysis technologies are developed and applied in the analysis, such as jet reconstruction and lepton identification in jets. New interpretations are under developing to improve the performance.

show abstract

Search for invisible decays of the Higgs boson produced at the CEPC *

Cited by 15 publications

References 14 publications

A novel scenario in the semi-constrained NMSSM

A novel scenario in the semi-constrained NMSSM

Freeze-In of radiative keV-scale neutrino dark matter from a new U(1)B-L

CEPC Research Report: Higgs Physics Analysis

Contact Info

Product

Resources

About