Probing Leptoquark and Heavy Neutrino at LHeC

Abstract

We explore leptoquark production and decay for the ${\tilde{R}}_2$ class of models at the proposed $e^{-}p$ collider LHeC, planned to operate with 150 GeV electron and 7 TeV proton beams. In addition to the coupling of leptoquark with the lepton and jet, the model also has right handed neutrinos, coupled to the leptoquark. We analyse the collider signatures of a number of final states, that can originate from leptoquark decay into the standard model particles, as well as, the final states that originate from further decay of the heavy neutrinos, produced from leptoquark. We find that the final state ${\ell }^{-}+\text{n-jets}(1\le \text{n}\le 2)$ has the largest discovery prospect, more than $5\sigma$ with only few fb of data to probe a leptoquark of mass 1.1 TeV, even with a generic set of cuts. The significance falls sharply with increasing leptoquark mass. However, with 100\,${\mathrm{fb}}^{-1}$ of data, a 5$\sigma$ discovery for leptoquarks of mass upto 1.4 TeV is still achieveable. Also for the same luminosity, final state $\bar{b}{\ell }^{+}{\tau }^{-}+\text{n-jets}(\text{n}\ge 2)+\text{MET}$, resulting from the cascade decay of the leptoquark to an $\bar{t}$ and right handed neutrino, followed by further decays of $\bar{t}$ and the neutrino, is expected to yield a rather large number of events~($\approx 180$).

29 pages, 32 figures

References in corpus (22)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Low energy effects of neutrino masses
• Light Sterile Neutrinos: Models and Phenomenology
• Search for heavy neutral leptons in events with three charged leptons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Fermion Masses in SO(10) Models
• Simplified models with baryon number violation but no proton decay
• Search for heavy neutrinos and right-handed W bosons in events with two leptons and jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Cornering Scalar Leptoquarks at LHC
• Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at $\sqrt{s}=$ 13 TeV
• Search for heavy Majorana neutrinos in mu+mu+[mu-mu-]+jets and e+e+[e-e-]+jets events in pp collisions at sqrt(s) = 7 TeV
• Extended double seesaw model for neutrino mass spectrum and low scale leptogenesis
• Searching for Leptoquarks at IceCube and the LHC
• Search for a singly produced third-generation scalar leptoquark decaying to a $\tau$ lepton and a bottom quark in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Searching for the minimal Seesaw models at the LHC and beyond
• Search for pair production of second generation scalar leptoquarks
• Neutrino mass and low-scale leptogenesis in a testable SUSY SO(10) model
• Inverse see-saw, leptogenesis, observable proton decay and ${\Delta }_{\mathrm{R}}^{\pm \pm }$ in SUSY SO(10) with heavy W_R
• Search for scalar leptoquarks and T-odd quarks in the acoplanar jet topology using 2.5 fb-1 of ppbar collision data at sqrt(s)=1.96 TeV
• Search for Third Generation Vector Leptoquarks in p anti-p Collisions at sqrt(s) = 1.96 TeV
• Type II see-saw dominance in SO(10)
• Searches for new physics in lepton plus jet final states in ATLAS and CMS

Cited by in corpus (16)

• The Large Hadron-Electron Collider at the HL-LHC
• Probing right handed neutrinos at the LHeC and lepton colliders using fat jet signatures
• Sensitivity of Lepton Number Violating Meson Decays in Different Experiments
• Distinguishing signatures of scalar leptoquarks at hadron and muon colliders
• Testing triplet fermions at the electron-positron and electron-proton colliders using fat jet signatures
• Boosting vector leptoquark searches with boosted tops
• Phenomenology of Scalar Leptoquarks at the LHC in Explaining the Radiative Neutrino Mass, Muon $g-2$ and Lepton Flavour Violating Observables
• Doubly-charged Higgs Boson at Future Electron-Proton Collider
• Distinguishing Leptoquarks at the LHC/FCC
• Right-handed neutrino pair production via second-generation leptoquarks
• Displaced Neutrino Jets at the LHeC
• Investigating the Production of Leptoquarks by Means of Zeros of Amplitude at Photon Electron Collider
• Indian Contributions to LHC Theory
• Testing the $R_{D^{(\ast )}}$ Anomaly at the LHeC
• Constraining Scalar Doublet and Triplet Leptoquarks with Vacuum Stability and Perturbativity
• The LHeC Project: e-Ring Revisited