Long-lived triplinos and displaced lepton signals at the LHC

Keçeli, Aslı Sabancı; Bandyopadhyay, Priyotosh; Huitu, Katri

doi:10.1140/epjc/s10052-019-6818-0

Cited by 8 publications

(4 citation statements)

References 66 publications

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“…One common feature that the both scenarios posses is that due to very compressed spectrum the missing energy cancels between the two DM particles, one coming from the charged Higgs decay and the other produced in association. The similar behaviour is also observed in charged Higgs pair production and generic to compressed spectrum scenarios found in supersymmetry [102] and Universal Extra Dimensions [103]. Nevertheless, for the IDM scenario due to a mass gap around 5-10 GeV among the charged Higgs and other other Z 2 -odd neutral Higgs bosons, p T of the the leptons coming from the charged Higgs boson can be around 20 GeV considering the boost effect at 100 TeV centre of mass energy.…”

Section: Lhc Phenomenologysupporting

confidence: 76%

Distinguishing inert Higgs doublet and inert triplet scenarios

Jangid

Bandyopadhyay

2020

Eur. Phys. J. C

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In this article we consider a comparative study between Type-I 2HDM and $$Y=0$$Y=0, SU(2) triplet extensions having one $$Z_2$$Z2-odd doublet and triplet that render the desired dark matter(DM). For the inert doublet model (IDM) either a neutral scalar or pseudoscalar can be the DM, whereas for inert triplet model (ITM) it is a CP-even scalar. The bounds from perturbativity and vacuum stability are studied for both the scenarios by calculating the two-loop beta functions. While the quartic couplings are restricted to $$0.1-0.2$$0.1-0.2 for a Planck scale perturbativity for IDM, these are much relaxed (0.8 ) for ITM. The RG-improved potentials by Coleman-Weinberg show the regions of stability, meta-stability and instability of the electroweak vacuum. The constraints coming from DM relic, the direct and indirect experiments like XENON1T, LUX and H.E.S.S., Fermi-LAT allow the DM mass $$\gtrsim 700, \,1176$$≳700,1176 GeV for IDM, ITM respectively. Though mass-splitting among $$Z_2$$Z2-odd particles in IDM is a possibility for ITM we have to rely on loop-corrections. The phenomenological signatures at the LHC show that the mono-lepton plus missing energy with prompt and displaced decays in the case of IDM and ITM can distinguish such scenarios at the LHC along with other complementary modes.

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Section: Lhc Phenomenologysupporting

confidence: 76%

Distinguishing inert Higgs doublet and inert triplet scenarios

Jangid

Bandyopadhyay

2020

Eur. Phys. J. C

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“…Finalstates of 4 , 3 + ≥ 1j, 2 + ≥ 2j are also studied as we found that MATHUSLA regions are preferred by BP2, BP3 for Y N = 5 × 10 −8 , 5 × 10 −9 , respectively. To complete the study we drew the regions plots in M N − M Z B−L (in Figure 12), M Z B−L − Y N (in Figure 13) and M N − Y N (in Figure 14) planes, where in Figure 13 The study performed in this article can be easily attributed to other U (1) models with righthanded neutrino [67][68][69][70] and other displaced neutral decays [71,72]. The segregation of transverse and longitudinal displaced decays manifests the longitudinal boost effect at higher centre of mass energies.…”

Section: Discussionmentioning

confidence: 99%

Boosted displaced decay of right-handed neutrinos at CMS, ATLAS and MATHUSLA

Bandyopadhyay¹,

Chun²,

Sen³

2022

Preprint

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We investigate boosted displaced signatures in the Type-I seesaw mechanism associated with the B − L gauge symmetry. Such events arise from decays of right-handed neutrinos depending on their Yukawa couplings and masses. Considering two scenarios: (a) three degenerate right-handed neutrinos whose Yukawa couplings are reconstructed from the observed neutrino masses and mixing; (b) only one right-handed neutrino which decouples from the observed neutrino mass generation and thus its coupling can be arbitrarily small, a detailed PYTHIA based simulation is performed to determine the parameter regions of the B − L gauge boson mass, the neutrino Yukawa couplings, and the right-handed neutrino mass sensitive to CMS, ATLAS and MATHUSLA detectors at the centre of mass energies of 14, 27 and 100 TeV via displaced signatures. We also show in detail how the boost effect enhances the displaced decay lengths, especially for the longitudinal ones, and hinders the probe of Majorana nature of neutrinos.

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“…Interesting scenarios appear when one considers the charged Higgs boson super-partner, i.e. the chargino, which can give rise to displaced decays [55]. The displaced Higgs boson decays can also appear in various SUSY scenarios [56,57].…”

Section: Long-lived Charged Statesmentioning

confidence: 99%

Obscure Higgs boson at Colliders

Bandyopadhyay,

Costantini

2020

Preprint

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In this study we consider an extension of the Standard Model with a complex hypercharge zero triplet scalar. In this scenario one of the charged Higgs bosons remains purely triplet and does not couple to the fermions, making it elusive at colliders. Also the physical pseudoscalar is a pure triplet and this purity makes it a suitable dark matter candidate without the need of discrete symmetries, unlike other extensions. The bounds from relic density and direct dark matter search experiments select its mass to be ∼ 1.35 − 1.60 TeV. The pure triplet charged Higgs gives rise to displaced signatures and their sensitivity at LHC and MATHUSLA have been studied. The prospects at present and future hadron/muon colliders of such exotic scalars are pointed out by calculating their productions cross-section and dominant decay modes. We present also the expected reach for the triplet states at a multi-TeV muon collider.

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Long-lived triplinos and displaced lepton signals at the LHC

Cited by 8 publications

References 66 publications

Distinguishing inert Higgs doublet and inert triplet scenarios

Distinguishing inert Higgs doublet and inert triplet scenarios

Boosted displaced decay of right-handed neutrinos at CMS, ATLAS and MATHUSLA

Obscure Higgs boson at Colliders

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