Constraints on a sub-eV scale sterile neutrino from nonoscillation measurements

Kim, C. S.; Castro, G. López; Sahoo, Dibyakrupa

doi:10.1103/physrevd.98.115021

Cited by 9 publications

(7 citation statements)

References 39 publications

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“…Experiments such as DANSS, NEOS, STEREO, and PROSPECT have effectively ruled out significant portions of the Reactor Antineutrino Anomaly (RAA) mid-low Δ𝑚 2 region and its best-fit parameters [5][6][7][8]. Investigations into high Δ𝑚 2 values, although posing tensions with cosmological constraints, are being explored through experiments like KATRIN and utilizing solar neutrino data [9] (Figure 2 left). Interestingly, despite the stringent exclusions, individual spectra from experiments such as the DANSS/RENO ratio or the somewhat criticized Neutrino-4 result (2.8𝜎, Δ𝑚 2 ≃ 7.3 eV 2 ) can still accommodate oscillatory behavior [10].…”

Section: Sterile Neutrino Searches At Reactorsmentioning

confidence: 99%

Search for the eV-scale sterile neutrino at a very short baseline

Minotti

2024

Proceedings of XVIII International Conference on Topics in Astroparticle and Underground Physics — PoS(TAUP2023)

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From the discovery of the neutrino to the measurement of 𝜃 13 , the last unknown neutrino mixing angle, nuclear reactors have proved to be a fundamental tool to study these particles, of which much remains to be unveiled. Measurements involving reactor antineutrinos rely on the prediction of their energy spectrum, a non-trivial exercise involving ad-hoc methods and carefully selected assumptions. A discrepancy between predicted and measured antineutrino fluxes at a few meters distance from reactors arose in 2011, prompting a series of experimental efforts aimed at studying neutrino oscillation at a baseline that was never tested before. This so-called reactor antineutrino anomaly can, in fact, be accounted for by invoking the existence of new sterile neutrinos at the eV mass scale that participate in the neutrino mixing, an appealing hypothesis tying to other anomalies already observed in the neutrino sector, that opens a door for physics beyond the Standard Model. With this article, the author intends to give an overview of the most recent results of the projects involved in the search for reactor antineutrino oscillation at a very short baseline, as well as their implication in our current understanding of the reactor antineutrino anomaly and the eV-scale sterile neutrino hypothesis.

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Section: Sterile Neutrino Searches At Reactorsmentioning

confidence: 99%

Search for the eV-scale sterile neutrino at a very short baseline

Minotti

2024

Proceedings of XVIII International Conference on Topics in Astroparticle and Underground Physics — PoS(TAUP2023)

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“…Finally, we would like to stress that our review is limited to the oscillation phenomenology, although light sterile neutrinos may have an impact also on non-oscillation searches. We mention the studies focused on the leptonic decays of charged leptons and mesons [62], the beta decay [63], and the neutrinoless double-beta decay [64,65].…”

Section: Introductionmentioning

confidence: 99%

Exploring Light Sterile Neutrinos at Long Baseline Experiments: A Review

Palazzo

2020

Universe

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Several anomalies observed in short-baseline neutrino experiments suggest the existence of new light sterile neutrino species. In this review, we describe the potential role of long-baseline experiments in the searches of sterile neutrino properties and, in particular, the new CP-violation phases that appear in the enlarged 3 + 1 scheme. We also assess the impact of light sterile states on the discovery potential of long-baseline experiments of important targets such as the standard 3-flavor CP violation, the neutrino mass hierarchy, and the octant of θ 23 .We also mention the work [26], where the combination of MINOS, Daya-Bay, and Bugey-3 was considered.

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“…This simple strategy has, however, remained unexplored in the currently existing literature. Instead of considering two-body leptonic decays B + → + N , similar to existing studies on π + or K + → + N which look for mono-energetic + to constrain |U N | 2 [88][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104][105][106][107], we have considered the threebody semileptonic decays B → D N which have bigger branching ratios in a larger mass range. 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.…”

Section: Introductionmentioning

confidence: 99%

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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Constraints on a sub-eV scale sterile neutrino from nonoscillation measurements

Cited by 9 publications

References 39 publications

Search for the eV-scale sterile neutrino at a very short baseline

Search for the eV-scale sterile neutrino at a very short baseline

Exploring Light Sterile Neutrinos at Long Baseline Experiments: A Review

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

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