Displaced vertex searches for sterile neutrinos at future lepton colliders

Antusch, Stefan; Cazzato, Eros; Fischer, Oliver

doi:10.1007/jhep12(2016)007

Cited by 112 publications

(106 citation statements)

References 75 publications

(97 reference statements)

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“…The NP case for the next generation collider facilities is usually built around the SM electroweak hierarchy problem, particle dark matter and heavy neutrinos (see e.g. [25][26][27][28][29][30][31][32][33]). However, the high involved costs and risks motivate an exhaustive set of applications.…”

Section: R D ( * ) = B(b → D ( * ) τ −ν )/B(b → D ( * )mentioning

confidence: 99%

Lepton polarization asymmetries in rare semi-tauonic $$ b \rightarrow s $$ b → s exclusive decays at FCC-ee

et al. 2017

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We consider measurements of exclusive rare semi-tauonic b-hadron decays, mediated by the b → sτ + τ − transition, at a future high-energy circular electron-positron collider (FCC-ee). We argue that the high boosts of b-hadrons originating from on-shell Z boson decays allow for a full reconstruction of the decay kinematics in hadronic τ decay modes (up to discrete ambiguities). This, together with the potentially large statistics of Z → bb, opens the door for the experimental determination of τ polarizations in these rare b-hadron decays. In the light of the current experimental situation on lepton flavor universality in rare semileptonic B decays, we discuss the complementary short-distance physics information carried by the τ polarizations and suggest suitable theoretically clean observables in the form of single-and double-τ polarization asymmetries.

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Section: R D ( * ) = B(b → D ( * ) τ −ν )/B(b → D ( * )mentioning

confidence: 99%

Lepton polarization asymmetries in rare semi-tauonic $$ b \rightarrow s $$ b → s exclusive decays at FCC-ee

et al. 2017

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“…This gives us a new means for probing the effective new physics at this lower mass scale, taking advantage of displaced vertices techniques. Recent works use displaced vertices for studying heavy sterile neutrinos in the LHC [14,38,[43][44][45][46][47] and future colliders [48,49].…”

Section: Introductionmentioning

confidence: 99%

Not-that-heavy Majorana neutrino signals at the LHC

Duarte

Peressutti

Sampayo

2017

J. Phys. G: Nucl. Part. Phys.

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We revisit the possibility of Majorana neutrinos production at the Large Hadron Collider (LHC) by studying the pp → l the angle between the final leptons, using a forward-backward like asymmetry to study the effects of the different gauge invariant operators. We also study the pp → l + i νγ process, which is dominant for low m N masses if tensorial one-loop generated new physics leading to a magnetic moment for the heavy neutrinos is present. This channel provides a powerful signal that could be observed at the LHC with the aid of non-pointing photons observables and cuts on the displacement between the prompt lepton and the photon in the final state.

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“…ν h → ν l Z * (off-shell) decays [22,23], an alternative to the case of SM-like Higgs decays instead into one light and one heavy neutrino [24][25][26][27][28][29][30][31][32][33].…”

Section: Jhep02(2018)109mentioning

confidence: 99%

Extra Higgs boson and Z′ as portals to signatures of heavy neutrinos at the LHC

Accomando

Rose

Moretti

et al. 2018

J. High Energ. Phys.

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In this paper, we discuss the potential of observing heavy neutrino (ν h ) signatures of a U(1) B−L enlarged Standard Model (SM) encompassing three heavy Majorana neutrinos alongside the known light neutrino states at the Large Hadron Collider (LHC). We exploit the theoretical decay via a heavy (non-SM-like) Higgs boson and Z ′ production followed by ν h → l ± W ∓( * ) and ν h → ν l Z ( * ) decays, ultimately yielding a 3l + 2j + E miss T signature and, depending upon how boosted the final state objects are, we define different possible selections aimed at improving the signal to background ratio in LHC Run 2 data for a wide range of heavy neutrino masses.

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Displaced vertex searches for sterile neutrinos at future lepton colliders

Cited by 112 publications

References 75 publications

Lepton polarization asymmetries in rare semi-tauonic $$ b \rightarrow s $$ b → s exclusive decays at FCC-ee

Lepton polarization asymmetries in rare semi-tauonic $$ b \rightarrow s $$ b → s exclusive decays at FCC-ee

Not-that-heavy Majorana neutrino signals at the LHC

Extra Higgs boson and Z′ as portals to signatures of heavy neutrinos at the LHC

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