Study the effect of beam energy spread and detector resolution on the search for Higgs boson decays to invisible particles at a future e $$^+$$ + e $$^-$$ - circular collider

Cerri, O.; Gruttola, M. De; Pierini, M.; Podo, Alessandro; Rolandi, G.

doi:10.1140/epjc/s10052-017-4680-5

Cited by 9 publications

(8 citation statements)

References 26 publications

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“…• The electroweak vacuum should be a global minimum [36] which can be satisfied for [27], FCC-ee [28], ILC [29], CEPC [30] and FCC-hh [31] and correspond to upper bounds on BR(H → invisible) ranging from 2.8% to 0.01%.…”

Section: Jhep04(2021)012 3 Theoretical and Experimental Constraintsmentioning

confidence: 99%

“…In the right panel of figure 1, we illustrate the predicted values of the BR(H → invisible) projected on the (m H ± , m N ) plane for λ 3 = 1 and y N = 2. In the same panel, we show the corresponding contours of the expected bounds from HL-LHC [27], FCC-ee [28], ILC [29], CEPC [30] and FCC-hh [31]. We can see that the JHEP04(2021)012 current LHC bounds do not play a significant role in restricting the 2D parameter space.…”

Section: Jhep04(2021)012 3 Theoretical and Experimental Constraintsmentioning

confidence: 99%

“…Right: the Higgs boson invisible decay branching projected in the plane of the mass of the charged Higgs m H ± and the mass of the Majorana DM m N . The contours in solid black lines show the expected limits from HL-LHC[27], FCC-ee[28], ILC[29], CEPC[30] and FCC-hh[31] and correspond to upper bounds on BR(H → invisible) ranging from 2.8% to 0.01%.…”

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confidence: 99%

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Searching for GeV-scale Majorana Dark Matter: inter spem et metum

Jueid

Nasri

Soualah

2021

J. High Energ. Phys.

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We suggest a minimal model for GeV-scale Majorana Dark Matter (DM) coupled to the standard model lepton sector via a charged scalar singlet. We show that there is an anti-correlation between the spin-independent DM-Nucleus scattering cross section (σSI) and the DM relic density for parameters values allowed by various theoretical and experimental constraints. Moreover, we find that even when DM couplings are of order unity, σSI is below the current experimental bound but above the neutrino floor. Furthermore, we show that the considered model can be probed at high energy lepton colliders using e.g. the mono-Higgs production and same-sign charged Higgs pair production.

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Section: Jhep04(2021)012 3 Theoretical and Experimental Constraintsmentioning

confidence: 99%

Section: Jhep04(2021)012 3 Theoretical and Experimental Constraintsmentioning

confidence: 99%

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Searching for GeV-scale Majorana Dark Matter: inter spem et metum

Jueid

Nasri

Soualah

2021

J. High Energ. Phys.

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“…< 0.06 at HL-LHC (Table 2). At the FCC-ee, the H Z( + − ) final state can be used to directly measure Γ inv (a 5σ observation is possible down to BR = 1.7±0.1%) [28], in events where its decay products escape undetected. If unobserved, a 0.5% upper limit (95% CL) [5] can be set on this branching ratio (Fig.…”

Section: Searches For Higgs-portal Dark Matter (Dm)mentioning

confidence: 99%

“…If unobserved, a 0.5% upper limit (95% CL) [5] can be set on this branching ratio (Fig. 3, right), placing DM bounds a factor of 50 (10) better than those at LHC (HL-LHC), and being also competitive with the reach of planned direct detection experiments for m φ < 10 GeV [28]. , encoded in four dim-6 operator c i coefficients, of precision Higgs (and triple gauge boson couplings) measurements at FCC-ee and ILC [16].…”

Section: Searches For Higgs-portal Dark Matter (Dm)mentioning

confidence: 99%

Higgs physics at the Future Circular Collider

d’Enterria¹

2017

Proceedings of 38th International Conference on High Energy Physics — PoS(ICHEP2016)

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(ii) Measurement of the Higgs potential (triple λ 3 , and quartic λ 4 self-couplings), via double and triple Higgs boson production in pp collisions at 100 TeV.(iii) Searches for new physics coupled to the scalar SM sector at scales Λ NP 6 TeV, thanks to measurements of the Higgs boson couplings with subpercent uncertainties in e + e − → H Z.(iv) Searches for dark matter in Higgs-portal interactions, via high-precision measurements of on-shell and off-shell Higgs boson invisible decays.All these measurements are beyond the reach of pp collisions at the Large Hadron Collider. New higher-energy e + e − and pp colliders such as FCC are thus required to complete our understanding of the full set of SM Higgs parameters, as well as to search for new scalar-coupled physics in the multi-TeV regime.

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Search for a heavy dark photon at future e+e− colliders

Huang

et al. 2018

J. High Energ. Phys.

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A coupling of a dark photon A from a U(1) A with the standard model (SM) particles can be generated through kinetic mixing represented by a parameter . A non-zero also induces a mixing between A and Z if dark photon mass m A is not zero. This mixing can be large when m A is close to m Z even if the parameter is small. Many efforts have been made to constrain the parameter for a low dark photon mass m A compared with the Z boson mass m Z . We study the search for dark photon in e + e − → γA → γµ + µ − for a dark photon mass m A as large as kinematically allowed at future e + e − colliders. For large m A , care should be taken to properly treat possible large mixing between A and Z. We obtain sensitivities to the parameter for a wide range of dark photon mass at planed e + e − colliders, such as Circular Electron Positron Collider (CEPC), International Linear Collider (ILC) and Future Circular Collider (FCC-ee). For the dark photon mass 20 GeV m A 330 GeV, the 2σ exclusion limits on the mixing parameter are 10 −3 -10 −2 . The CEPC with √ s = 240 GeV and FCC-ee with √ s = 160 GeV are more sensitive than the constraint from current LHCb measurement once the dark photon mass m A 50 GeV. For m A 220 GeV, the sensitivity at the FCC-ee with √ s = 350 GeV and 1.5 ab −1 is better than that at the 13 TeV LHC with 300 fb −1 , while the sensitivity at the CEPC with √ s = 240 GeV and 5 ab −1 can be even better than that at 13 TeV LHC with 3 ab −1 for m A 180 GeV. We also comment on sensitivities of e + e − → γA with dark photon decay into several other channels at future e + e − colliders.

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Study the effect of beam energy spread and detector resolution on the search for Higgs boson decays to invisible particles at a future e $$^+$$ + e $$^-$$ - circular collider

Cited by 9 publications

References 26 publications

Searching for GeV-scale Majorana Dark Matter: inter spem et metum

Searching for GeV-scale Majorana Dark Matter: inter spem et metum

Higgs physics at the Future Circular Collider

Search for a heavy dark photon at future e+e− colliders

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