Search for heavy isosinglet neutrinos in e+e− annihilation at GeV

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doi:10.1016/s0370-2693(99)00852-7

“…Heavy neutrinos with masses of the order of electroweak scale can be directly produced on-shell at colliders. Such a direct search was performed in e e + − annihilation at LEP [221,222], assuming a single heavy neutrino production via its mixing with active neutrinos: e e N L ν → ℓ + − , followed by its decay via NC or CC interaction to the SM W, Z or Higgs (H) boson:…”

Section: Direct Collider Searchesmentioning

confidence: 99%

Neutrinos and collider physics

Deppisch

¹

,

Dev

²

,

Pilaftsis

³

2015

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We review the collider phenomenology of neutrino physics and the synergetic aspects at energy, intensity and cosmic frontiers to test the new physics behind the neutrino mass mechanism. In particular, we focus on seesaw models within the minimal setup as well as with extended gauge and/or Higgs sectors, and on supersymmetric neutrino mass models with seesaw mechanism and with Rparity violation. In the simplest type-I seesaw scenario with sterile neutrinos, we summarize and update the current experimental constraints on the sterile neutrino mass and its mixing with the active neutrinos. We also discuss the future experimental prospects of testing the seesaw mechanism at colliders and in related low-energy searches for rare processes, such as lepton flavor violation and neutrinoless double beta decay. The implications of the discovery of lepton number violation at the Large Hadron Collider for leptogenesis are also studied.

show abstract

“…Such a direct search was performed in e e + − annihilation at LEP [221,222], assuming a single heavy neutrino production via its mixing with active neutrinos: e e N L ν → ℓ + − , followed by its decay via NC or CC interaction to the SM W, Z or Higgs (H) boson:…”

Section: Direct Collider Searchesmentioning

confidence: 99%

Neutrinos and Collider Physics

Deppisch

¹

2017

Particle Physics at the Year of Light

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We review the collider phenomenology of neutrino physics and the synergetic aspects at energy, intensity and cosmic frontiers to test the new physics behind the neutrino mass mechanism. In particular, we focus on seesaw models within the minimal setup as well as with extended gauge and/or Higgs sectors, and on supersymmetric neutrino mass models with seesaw mechanism and with Rparity violation. In the simplest type-I seesaw scenario with sterile neutrinos, we summarize and update the current experimental constraints on the sterile neutrino mass and its mixing with the active neutrinos. We also discuss the future experimental prospects of testing the seesaw mechanism at colliders and in related low-energy searches for rare processes, such as lepton flavor violation and neutrinoless double beta decay. The implications of the discovery of lepton number violation at the Large Hadron Collider for leptogenesis are also studied.

show abstract

“…The most stringent constraint on mixing with muon from LEP2 experiments requires |V µN | 2 10 −4 − 10 −5 for 5 GeV < m N < 80 GeV [54][55][56]. For neutrinos heavier than Z bosons, there are also plenty of researches based on electron colliders [57][58][59][60][61][62][63][64][65]. However, due to the limitation of the center-of-mass (c.m.)…”

Section: Models and Mixing Parametersmentioning

confidence: 99%

A potential scenario for Majorana neutrino detection at future lepton colliders

Zhang

¹

,

Zhang

²

2019

J. High Energ. Phys.

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The existence of Majorana neutrinos must lead to lepton-number violating processes, and the Majorana nature of neutrinos can only be experimentally verified only via lepton-number violating processes. We propose a new approach to search for Majorana neutrinos at future electron-positron colliders by exploiting this feature. We investigate the ∆L = 2 like-sign dilepton production and find that lepton colliders with different centerof-mass (c.m.) energies have comparative advantages in resonant production of a Majorana neutrino in either light neutrino mass range or heavy mass range. At the future Circular Electron-Positron Collider (CEPC), with 250 GeV c.m. energy and 5 ab −1 integrated luminosity, we find that there could be more significant sensitivity for resonant production of a Majorana neutrino in the mass range of 5-80 GeV than previous results at LEP2 or LHC. At the 1 TeV ILC with 1 ab −1 integrated luminosity, it has better sensitivity while the neutrino mass is larger than 250 GeV.

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Search for heavy isosinglet neutrinos in e+e− annihilation at GeV

Cited by 20 publications

References 19 publications

Neutrinos and collider physics

Neutrinos and collider physics

Neutrinos and Collider Physics

A potential scenario for Majorana neutrino detection at future lepton colliders

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