Sensitivity bounds on heavy neutrino mixing 
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Cvetič, Gorazd; Kim, C. S.

doi:10.1103/physrevd.100.015014

Cited by 26 publications

(14 citation statements)

References 126 publications

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“…The reach of our study to constrain |U μN | 2 and |U τ N | 2 is better by an order of magnitude from existing experimental constraints in certain mass ranges of interest. Interestingly, our constraint on |U μN | 2 obtained by considering only ∼ 4.8 × 10 8 events of fully reconstructed B → DμN decays at Belle II [108] is comparable with the constraint achievable from 4.8 × 10 12 events of B → Dμμπ decays at upgraded LHCb [36]. Although the missing sterile neutrino search gives the stringent constraint on |U N | 2 , it can not distinguish Dirac and Majorana neutrinos.…”

Section: Introductionsupporting

confidence: 60%

“…The mixing parameters, U N , which describe the a e-mail: cskim@yonsei.ac.kr b e-mail: yjkwon63@yonsei.ac.kr c e-mail: donghun.lee@yonsei.ac.kr d e-mail: scohph@yonsei.ac.kr e e-mail: sahoodibya@yonsei.ac.kr (corresponding author) strength of mixing between a sterile (heavy) neutrino N with the SM flavor (light) neutrinos ν are constrained by various experimental data depending on the mass of N (see Refs. [35,36] for further details and references).…”

Section: Introductionmentioning

confidence: 99%

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Probing sterile neutrinos in B (D) meson decays at Belle II (BESIII)

et al. 2020

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We present, how a systematic study of $$B \rightarrow D\ell N$$B→DℓN ($$D \rightarrow K \ell N$$D→KℓN) decays with $$\ell =\mu ,\tau $$ℓ=μ,τ, at Belle II (BESIII) can provide unambiguous signature of a heavy neutrino N and/or constrain its mixing with active neutrinos $$\nu _\ell $$νℓ, which is parameterized by $$| U_{\ell N} |^2$$|UℓN|2. Our constraint on $$\vert U_{\mu N} \vert ^2$$|UμN|2 that can be achieved from the full Belle II data is comparable with what can be obtained from the much larger data set of the upgraded LHCb. Additionally, our method offers better constraint on $$\vert U_{\mu N} \vert ^2$$|UμN|2 for mass of sterile neutrino $$m_N < 2$$mN<2 GeV. We can also probe the Dirac and Majorana nature of N by observing the sequential decay of N, including suppression from observation of a displaced vertex as well as helicity flip, for Majorana N.

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Section: Introductionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Probing sterile neutrinos in B (D) meson decays at Belle II (BESIII)

et al. 2020

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“…Although the mixing between ν τ and HNL is more challenging to be probed compared with those of ν e and ν μ , there already exist some studies for M N ∼ Oð1-5Þ GeV in Refs. [30,31], M N ∼ Oð1-20Þ GeV in Refs. [32][33][34][35], and M N > 150 GeV in Refs.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity reach on heavy neutral leptons and τ -neutrino mixing |UτN|2 at the HL-LHC

et al. 2020

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The model of heavy neutral leptons (HNLs) is one of the well-motivated models beyond the standard model from both theoretical and phenomenological point of views. It is an indispensable ingredient to explain the puzzle of tiny neutrino masses and the origin of the matter-antimatter asymmetry in our Universe, based on the models in which the simplest type-I seesaw mechanism can be embedded. The HNL with a mass up to the electroweak scale is an attractive scenario which can be readily tested in present or near-future experiments including the LHC. In this work, we study the decay rates of HNLs and find the sensitive parameter space of the mixing angles between the active neutrinos and HNLs. Since there are fewer collider studies of the mixing between ν τ and HNL in literature compared with those of ν e and ν μ for the HNL of mass in the electroweak scale, we focus on the channel pp → W AEðÃÞ þ X → τ AE N þ X to search for HNLs at the LHC 14 TeV. The targeted signature consists of three prompt charged leptons, which include at least two tau leptons. After the signal-background analysis, we further set sensitivity bounds on the mixing jU τN j 2 with M N at high-luminosity LHC (HL-LHC). We predict the testable bounds from HL-LHC can be stronger than the previous LEP constraints and electroweak precision data (EWPD), especially for M N ≲ 50 GeV can reach down to jU τN j 2 ≈ 5 × 10 −6 .

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“…Since the heavy neutrinos are the SM-singlet candidates, they obtain the couplings with the weak gauge bosons only through the mixing via Y D , making it possible to study the production of such heavy neutrinos at the collider experiments. Historically there are a variety of search strategies of the heavy neutrinos at different existing and future facilities like the LHC, Linear Collider (LC), Large Hadron Electron Collider (LHeC) [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37], tau and meson factories where the bounds on the heavy neutrino mass and the mixing with the light species have been shown [38][39][40][41][42][43][44][45][46][47][48][49]. Due to the Majorana nature of the heavy neutrinos we can obtain a pair of like sign leptons in the final state where the one lepton is produced in association with the heavy neutrino and the other one comes from the leading decay mode of the heavy neutrino into a lepton and a W boson.…”

Section: Introductionmentioning

confidence: 99%

Measuring the heavy neutrino oscillations in rare W boson decays at the Large Hadron Collider

Cvetič¹,

Das²,

Araya³

et al. 2019

J. Phys. G: Nucl. Part. Phys.

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Majorana neutrinos in the seesaw model can have sizable mixings through which they can be produced at the Large Hadron Collider (LHC) and show a remarkable Lepton Number Violating (LNV) signature. In this article we study the LNV decay of the W boson via two almost degenerate heavy on-shell Majorana neutrinos N j , into three charged leptons and a light neutrino. We consider the scenario where the heavy neutrino masses are within 1 GeV ≤ M N ≤ 10 GeV. We evaluated the possibility to measure a LNV oscillation process in such a scenario, namely, the modulation of the quantity dΓ/dL for the process at the LHC where W ± → µ ± N → µ ± τ ± W ∓ * → µ ± τ ± e ∓ ν e . L is the distance within the detector between the two vertices of the process. We found out some realistic conditions under which such a modulation could be probed at the LHC.

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Sensitivity bounds on heavy neutrino mixing |UμN|2 and |Uτ

Cited by 26 publications

References 126 publications

Probing sterile neutrinos in B (D) meson decays at Belle II (BESIII)

Probing sterile neutrinos in B (D) meson decays at Belle II (BESIII)

Sensitivity reach on heavy neutral leptons and τ -neutrino mixing |UτN|2 at the HL-LHC

Measuring the heavy neutrino oscillations in rare W boson decays at the Large Hadron Collider

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