Displaced lepton flavour violating signatures of right-handed sneutrinos in U(1)′ supersymmetric models

Bandyopadhyay, Priyotosh

doi:10.1007/jhep09(2017)052

Cited by 12 publications

(6 citation statements)

References 40 publications

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“…A very small decay width of 7.58 × 10 −17 GeV easily gives rise to O(2) meter displaced charged Higgs boson decay. [15,[91][92][93][94][95][96] Next we focus on the production cross-sections of the chosen benchmark points at the LHC with centre of mass energy of 14, 100 TeV [97]. In Table 3 present the cross-sections of various associated Higgs production modes at the LHC with centre of mass energy of 14 and 100 TeV.…”

Section: Lhc Phenomenologymentioning

confidence: 99%

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 Phenomenologymentioning

confidence: 99%

Distinguishing inert Higgs doublet and inert triplet scenarios

Jangid

Bandyopadhyay

2020

Eur. Phys. J. C

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“…Displaced Higgs production in a supersymmetric Type-III seesaw mechanism is already looked into [28]. In general, the seesaw models with lower couplings predict displaced decays of right-handed neutrinos in case of Type-I seesaw [67,68] but we do not expect any flying charged track in those scenarios. In case of Type-III seesaw at the LHC, N ± gives charged track before it decays, whereas N 0 has invisible track before the decay.…”

Section: Discussionmentioning

confidence: 83%

Displaced Higgs production in Type-III Seesaw at the LHC/FCC, MATHUSLA and Muon collider

Sen,

Bandyopadhyay,

Dutta

et al. 2021

Preprint

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In this article, we explore the possibility of displaced Higgs production from the decays of the heavy fermions in the Type-III seesaw extension of the Standard Model at the LHC/FCC and the muon collider. The displaced heavy fermions and the Higgs boson can be traced back by measuring the displaced charged tracks of the charged leptons along with the b-jets. The prospects of the transverse and longitudinal displaced decay lengths are extensively studied in the context of the boost at the LHC/FCC. Due to the parton distribution function, the longitudinal boosts leads to larger displacement compared to the transverse one, which can reach MATHUSLA and beyond. Such measurements are indeed possible by the fully visible finalstate, which captures the complete information about the longitudinal momenta. The comparative studies are made at the LHC/FCC with the centre of mass energies of 14, 27 and 100 TeV, respectively. A futuristic study of the muon collider where the collision happen in the centre of mass frame is analysed for centre of mass energies of 3.5, 14 and 30 TeV. Contrary to LHC/FCC, here the transverse momentum diverges, however, the maximum reach in both the direction are identical due to the constant total momentum in each collision. The reach of the Yukawa couplings and fermion masses are appraised for both the colliders.

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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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Displaced lepton flavour violating signatures of right-handed sneutrinos in U(1)′ supersymmetric models

Cited by 12 publications

References 40 publications

Distinguishing inert Higgs doublet and inert triplet scenarios

Distinguishing inert Higgs doublet and inert triplet scenarios

Displaced Higgs production in Type-III Seesaw at the LHC/FCC, MATHUSLA and Muon collider

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

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