Prompt signals and displaced vertices in sparticle searches for next-to-minimal gauge-mediated supersymmetric models

Allanach, B. C.; Badziak, Marcin; Cottin, G.; Desai, Nishita; Hugonie, Cyril; Ziegler, Robert

doi:10.1140/epjc/s10052-016-4330-3

Cited by 29 publications

(33 citation statements)

References 53 publications

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“…This was addressed for example in Ref. [31], when there are two b s coming from the displaced vertex. By allowing a bigger merging distance of 5 mm (instead of 1 mm) when forming a vertex, some efficiency is recovered.…”

Section: Simulations and Selection Of Displaced Eventsmentioning

confidence: 99%

Displaced vertices as probes of sterile neutrino mixing at the LHC

2018

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We investigate the reach at the LHC to probe light sterile neutrinos with displaced vertices. We focus on sterile neutrinos N with masses m N ∼ (5-30) GeV, that are produced in rare decays of the Standard Model gauge bosons and decay inside the inner trackers of the LHC detectors. With a strategy that triggers on the prompt lepton accompanying the N displaced vertex and considers charged tracks associated to it, we show that the 13 TeV LHC with 3000/fb is able to probe active-sterile neutrino mixings down to |V lN | 2 ≈ 10 −9 , with l = e, µ, which is an improvement of up to four orders of magnitude when comparing with current experimental limits from trileptons and proposed lepton-jets searches. In the case when τ mixing is present, mixing angles as low as |V τ N | 2 ≈ 10 −8 can be accessed.

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Section: Simulations and Selection Of Displaced Eventsmentioning

confidence: 99%

Displaced vertices as probes of sterile neutrino mixing at the LHC

2018

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“…As we mentioned, we choose to neglect this possible issue (an interesting discussion of which can be found in Ref. [128]). We argue that this simplification has a limited impact on our estimated exclusions (shown in Figures 11 and 12) for the following reasons: (i) Only one DV is enough to satisfy the analysis' requirements, Figure 14: Efficiencies for the simplified final states with hh+E / T , hZ +E / T , ZZ +E / T .…”

Section: B Recasting Of the Atlas Searchmentioning

confidence: 99%

Singlet-Doublet dark matter freeze-in: LHC displaced signatures versus cosmology

Lopez-Honorez

Lowette

Mariotti

2018

J. High Energ. Phys.

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We study the Singlet-Doublet dark matter model in the regime of feeble couplings, where the dark matter abundance is obtained via the freeze-in mechanism. As a consequence of the small couplings, the heavier particles in the model are long-lived with decay length at typical scales of collider experiments. We analyse the collider signatures of the model, characterised by displaced h and Z bosons plus missing momentum, employing current LHC searches for displaced vertices and missing energy to significantly constrain the parameter space of the model. We also take into account the cosmological bounds relevant for our light dark matter candidate arising from Lyman-α forest constraints. Our analysis emphasises the interplay between displaced signatures at the LHC and cosmology for dark matter candidates whose relic abundance is obtained through the freeze-in mechanism.

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“…This is another example of displaced signatures at the LHC that have recently been receiving attention in the theoretical [92][93][94][95] as well as experimental community [96,97].…”

Section: Jhep04(2017)114mentioning

confidence: 93%

Majorana Higgses at colliders

Nemevšek

Nesti

Vásquez

2017

J. High Energ. Phys.

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Collider signals of heavy Majorana neutrino mass origin are studied in the minimal Left-Right symmetric model, where their mass is generated spontaneously together with the breaking of lepton number. The right-handed triplet Higgs boson ∆, responsible for such breaking, can be copiously produced at the LHC through the Higgs portal in the gluon fusion and less so in gauge mediated channels. At ∆ masses below the opening of the V V decay channel, the two observable modes are pair-production of heavy neutrinos via the triplet gluon fusion gg → ∆ → N N and pair production of triplets from the Higgs h → ∆∆ → 4N decay. The latter features tri-and quad same-sign lepton final states that break lepton number by four units and have no significant background. In both cases up to four displaced vertices may be present and their displacement may serve as a discriminating variable. The backgrounds at the LHC, including the jet fake rate, are estimated and the resulting sensitivity to the Left-Right breaking scale extends well beyond 10 TeV. In addition, sub-dominant radiative modes are surveyed: the γγ, Zγ and lepton flavour violating ones. Finally, prospects for ∆ signals at future e + e − colliders are presented.

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Prompt signals and displaced vertices in sparticle searches for next-to-minimal gauge-mediated supersymmetric models

Cited by 29 publications

References 53 publications

Displaced vertices as probes of sterile neutrino mixing at the LHC

Displaced vertices as probes of sterile neutrino mixing at the LHC

Singlet-Doublet dark matter freeze-in: LHC displaced signatures versus cosmology

Majorana Higgses at colliders

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