Looking for minimal inverse seesaw scenarios at the LHC with jet substructure techniques

Bhardwaj, Akanksha; Das, Arindam; Konar, Partha; Thalapillil, Arun M.

doi:10.1088/1361-6471/ab7769

Cited by 31 publications

(27 citation statements)

References 113 publications

(174 reference statements)

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“…Further we use PYTHIA6 [100] for LHeC as used in [87] and PYTHIA8 [101] for the linear colliders, where subsequent decay, initial state radiation, final state radiation and hadronisation have been carried out. We have indicated in [14,15] that if the RHNs are sufficiently heavy, the daughter particles can be boosted. We prefer the hadronic decay mode of the W where the jets can be collimated so that we can call it a fat-jet (J).…”

Section: Collider Analysismentioning

confidence: 99%

“…These RHNs can have masses from eV scale to 10 14 GeV scale depending upon the models. For instance, the sterile neutrinos [8] with masses in the eV range could lead to effects in short distance neutrino oscillation experiments by introducing an additional mass squared difference, keV mass sterile neutrinos are potential candidates for "warm" dark matter, MeV scale sterile neutrinos can be possible explanation for MiniBoone [9] and there can be very heavy sterile neutrinos with masses M GU T ∼ 10 14 GeV, close to M GU T ∼ 10 16 GeV in model of grand unified theories (GUTs). These RHNs, originally Standard Model (SM) gauge singlet, being mixed with the SM light neutrinos to interact with the SM gauge bosons.…”

Section: Introductionmentioning

confidence: 99%

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Probing right handed neutrinos at the LHeC and lepton colliders using fat jet signatures

Das¹,

Jana

Mandal

et al. 2019

Phys. Rev. D

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The inclusion of heavy neutral leptons (right-handed neutrinos) to the Standard Model (SM) particle content is one of the best motivated ways to account for the observed neutrino masses and flavor mixing.The modification of the charged and neutral currents from active-sterile mixing of the neutral leptons can provide novel signatures which can be tested at the future collider experiments. In this article, we explore the discovery prospect of a very heavy right handed neutrino to probe such extensions at the future collider experiments like Large Hadron electron Collider (LHeC) and linear collider. We consider the production of the heavy neutrino via the t and s-channel processes and its subsequent decays into the semi-leptonic final states. We specifically focus on the scenario where the gauge boson produced from heavy neutrino decay is highly boosted, leading to a fat-jet. We study the bounds on the sterile neutrino properties from several past experiments and compare with our results.

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Section: Collider Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Probing right handed neutrinos at the LHeC and lepton colliders using fat jet signatures

Das¹,

Jana

Mandal

et al. 2019

Phys. Rev. D

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“…As can be seen, the leptonic collider is much more effective than the hadronic collider to constraint the mixing angle for higher masses. In [38], the authors analysed the discovery prospect of heavy neutrino at HL-LHC, using using sub-structure analysis. For higher masses, the sensitivity reach is |V lN | 2 ∼ 10 −1 −10 −2 .…”

Section: Signal and Background Efficiency For √ S = 3 Tevmentioning

confidence: 99%

“…Most of the UV completed seesaw models contain Standard Model (SM) gauge singlet heavy neutrino N . Depending on the mass of the gauge singlet neutrinos and their mixings with the active neutrino states, seesaw can be tested at colliders [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47], as well as, in other non-collider experiments, such as, neutrinoless double beta decay [48][49][50][51][52][53][54], lepton flavor violating processes i → j γ, µ → 3e, µ → e conversion in nuclei [55,56], rare-meson decays [57][58][59] etc. Among the collider studies, LHC searches mostly focus on the chargedcurrent production mode, i.e., heavy neutrino production in pp → ± N , followed by the subsequent decays of N .…”

Section: Introductionmentioning

confidence: 99%

Fat jet signature of a heavy neutrino at a lepton collider

2019

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We explore the discovery prospect of a very heavy neutrino at the proposed e + e − collider for two different c.m.energies √ s = 1.4 TeV and 3 TeV. We consider production of heavy neutrino via s and t-channel processes, and its subsequent prompt decays leading to semi-leptonic final states, along with significant missing energy. For our choice of masses, the gauge boson produced from heavy neutrino decay is highly boosted, leading to a fat-jet. We carry out a detail signal and background analysis for e ± + j fat + E T final state using both cut based and multivariate techniques. We show that a heavy neutrino of mass 600 − 2700 GeV and active-sterile mixing |V eN | 2 ∼ 10 −5 can be probed with 5σ significance at e + e − collider after collecting L = 500 fb −1 of data. We find the sensitivity reach at e + e − collider is order of magnitude enhanced as compared to LHC.

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“…For other future colliders, such as, e + e − , FCC-hh, and discussions on a future e − p collider, such as, LHeC, see [30][31][32][33][34][35][36][37]. For heavy RH neutrino of mass M N ∼ TeV, the final decay products will be collimated and will produce fat-jets [23,33,35,38]. For the discussion on sub weak scale RH neutrino state, that can produce lepton-jet, see [39].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of lepton number violating meson decays in different experiments

et al. 2019

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We study the discovery prospect of different three body lepton number violating (LNV) meson decays M − 1 → − 1 − 2 M + 2 in the framework of right handed (RH) neutrino extended Standard Model (SM). We consider a number of ongoing experiments, such as, NA62 and LHCb at CERN, Belle II at SuperKEK, as well as at the proposed future experiments, SHiP, MATHUSLA and FCCee. The RH Majorana neutrino N mediating these meson decays provides a resonant enhancement of the rates, if the mass of N lies in the range (100 MeV − 6 GeV). We consider the effect of parent mesons velocity, as well as, the effect of finite detector size. Using the expected upper limits on the number of events for the LNV decay modes, M − 1 → − 1 − 2 π + (M 1 = B, B c , D, D s and K), we analyze the sensitivity reach of the mixing angles |V eN | 2 , |V µN | 2 , |V τ N | 2 , |V eN V µN |, |V eN V τ N | and |V µN V τ N | as a function of heavy neutrino mass M N . We show that, inclusion of parent meson velocity can account to a large difference for active-sterile mixing, specially for D, D s meson decay at SHiP and K meson decay at NA62. Taking into account the velocity of the D s meson, the future beam dump experiment SHiP can probe |V eN | 2 ∼ 10 −9 . For RH neutrino mass in between 2 -5 GeV, MATHUSLA can provide best sensitivity reach of active-sterile mixings. 1 − 2 π + [ [49][50][51][52][53][54][55][56][57][58][59][60][61][62][63]. For RH neutrino search, this process has an advantage as compared to the LNV 0νββ-decay due to the lesser uncertainties in the meson decay constant.In the later process, the nuclear matrix elements (NME) uncertainty can make difference in the prediction of active-sterile mixing. We consider a number of three body ∆L = 2 mesonD, D s and K) and derive sensitivity reach of the activesterile mixing parameter in a number of ongoing and future experiments, such as, NA62, LHCb at CERN, Belle II, SHiP, MATHUSLA and FCC-ee. Note that, the light neutrino contribution to these meson decays are extremely suppressed. However, for RH neutrinos in the mass range of 0.140 GeV < M N < 6 GeV, the intermediate Majorana neutrinos can be produced on-shell. This results in resonant enhancement of these decay rates. In addition, large number of decaying mesons in these experiments, in-particular at SHiP will facilitateto improve the sensitivity reach significantly. In deriving these results, we consider parent meson velocity, that affects the probability of RH neutrino decay inside the detector. We show, that inclusion of parent meson velocity can give one or two orders of magnitude shift O(10 1 − 10 2 ) in the results obtained.The paper is organized as follows. In sec. 2, we very briefly review the basic features of the three RH neutrino framework, following which in sec. 3, we discuss in detail the contributions of the RH neutrino in meson decays. In sec. 4, we then compute the total decay width of RH neutrino N in the mass range 0.140 GeV ≤ M N ≤ 6 GeV. In sec. 5, we study the effects of parent meson velocity in the RH neutrino decay probabi...

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Looking for minimal inverse seesaw scenarios at the LHC with jet substructure techniques

Cited by 31 publications

References 113 publications

Probing right handed neutrinos at the LHeC and lepton colliders using fat jet signatures

Probing right handed neutrinos at the LHeC and lepton colliders using fat jet signatures

Fat jet signature of a heavy neutrino at a lepton collider

Sensitivity of lepton number violating meson decays in different experiments

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