ATLAS discovery potential for Higgs bosons beyond the standard model

Warsinsky, M.

doi:10.1088/1742-6596/110/7/072046

Cited by 12 publications

(12 citation statements)

References 16 publications

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“…In this analysis [19], both statistical and systematical errors are included. With the use of the analysis, we plot the experimental sensitivity to detect the signal in…”

Section: The Case M Dm < M H /2mentioning

confidence: 99%

Can WIMP dark matter overcome the nightmare scenario?

et al. 2010

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Even if new physics beyond the Standard Model (SM) indeed exists, the energy scale of new physics might be beyond the reach at the Large Hadron Collider (LHC) and the LHC could find only the Higgs boson but nothing else.This is the so-called "nightmare scenario". On the other hand, the existence of the dark matter has been established from various observations. One of the promising candidates for thermal relic dark matter is a stable and electric charge-neutral Weakly Interacting Massive Particle (WIMP) with the mass below the TeV scale. In the nightmare scenario, we introduce a WIMP dark matter singlet under the SM gauge group, which only couples to the Higgs doublet at the lowest order, and investigate a possibility that such WIMP dark matter can be a clue to overcome the nightmare scenario via various phenomenological tests such as the dark matter relic abundance, the direct detection experiments for the dark matter particle, and the production of the dark matter particle at the LHC.

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“…In this analysis [19], both statistical and systematical errors are included. With the use of the analysis, we plot the experimental sensitivity to detect the signal in…”

Section: The Case M Dm < M H /2mentioning

confidence: 99%

Can WIMP dark matter overcome the nightmare scenario?

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Assuming an invisible branching ratio of 1, a Higgs boson with mass up to about 150 GeV can be discovered in Higgs radiation from a Z boson at L = 10 fb −1 and √ s = 14 TeV [39][40][41][42][43][44][45][46][47]. At high luminosity this reach can be extended to ∼ 250 GeV in associated production with a top quark pair [46][47][48][49]. Weak boson fusion allows for the discovery up to 480 GeV with 10 fb −1 integrated luminosity [46,47,[50][51][52].…”

Section: Prospects For Direct Confirmation Of Br Invmentioning

confidence: 99%

“…At high luminosity this reach can be extended to ∼ 250 GeV in associated production with a top quark pair [46][47][48][49]. Weak boson fusion allows for the discovery up to 480 GeV with 10 fb −1 integrated luminosity [46,47,[50][51][52]. Assuming SM production, invisible branching ratios as low as 25% can be probed in weak boson fusion for a 120 GeV Higgs boson at L = 30 fb −1 and √ s = 14 TeV at 95% CL [50][51][52].…”

Section: Prospects For Direct Confirmation Of Br Invmentioning

confidence: 99%

Probing for invisible Higgs decays with global fits

Espinosa

Grojean

Mühlleitner

et al. 2012

J. High Energ. Phys.

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Abstract:We demonstrate by performing a global fit on Higgs signal strength data that large invisible branching ratios (Br inv ) for a Standard Model (SM) Higgs particle are currently consistent with the experimental hints of a scalar resonance with mass m h ∼ 124 GeV. For this mass, we find Br inv < 0.64 (95% CL) from a global fit to individual channel signal strengths supplied by ATLAS, CMS and the Tevatron collaborations. Novel tests that can be used to improve the prospects of experimentally discovering the existence of a Br inv with future data are proposed. These tests are based on the combination of all visible channel Higgs signal strengths, and allow us to examine the required reduction in experimental and theoretical errors in this data that would allow a more significantly bounded invisible branching ratio to be experimentally supported. We examine in some detail how our conclusions and method are affected when a scalar resonance at this mass scale has couplings deviating from the SM ones.

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“…For Set A, we see that Z ′ → ν R ν R and Z ′ → Ψ 2 Ψ 2 followed by Ψ 2 → s 0 2 ν R (s 0 2 ν R ) produce about 1200 pairs of ν R from 7000 of Z ′ . For Set B, the number of ν R pairs increases to about 1700 because of an additional contribution from the decay [40,41] and future linear colliders [42] by "observing" the h 0 invisible decay 4 .…”

Section: A Collider Phenomenologymentioning

confidence: 99%

TeV-scale seesaw model with a loop-induced Dirac mass term and dark matter fromU(1)B−Lgauge symmetry breaking

2012

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We show a TeV-scale seesaw model where Majorana neutrino masses, the dark matter mass, and stability of the dark matter can be all originated from the U (1) B−L gauge symmetry. Dirac mass terms for neutrinos are forbidden at the tree level by U (1) B−L , and they are induced at the one-loop level by spontaneous U (1) B−L breaking. The right-handed neutrinos can be naturally at the TeV-scale or below because of the induced Dirac mass terms with loop suppression. Such righthanded neutrinos would be discovered at the CERN Large Hadron Collider (LHC). On the other hand, stability of the dark matter is guaranteed without introducing an additional Z 2 symmetry by a remaining global U (1) symmetry after the U (1) B−L breaking. A Dirac fermion Ψ 1 or a complex neutral scalar s 0 1 is the dark matter candidate in this model. Since the dark matter (Ψ 1 or s 0 1 ) has its own B−L charge, the invisible decay of the U (1) B−L gauge boson Z ′ is enhanced. Experimental constraints on the model are considered, and the collider phenomenology at the LHC as well as future linear colliders is discussed briefly.

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ATLAS discovery potential for Higgs bosons beyond the standard model

Cited by 12 publications

References 16 publications

Can WIMP dark matter overcome the nightmare scenario?

Can WIMP dark matter overcome the nightmare scenario?

Probing for invisible Higgs decays with global fits

TeV-scale seesaw model with a loop-induced Dirac mass term and dark matter fromU(1)B−Lgauge symmetry breaking

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