Search for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:msub><mml:mi>ν</mml:mi><mml:mi>μ</mml:mi></mml:msub><mml:msub><mml:mover accent="true"><mml:mi>ν</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mi>μ</mml:mi></mml:msub></mml:math>Decays in the LSND Detector

Auerbach, L. B.; Burman, R. L.; Caldwell, D. O.; Church, E.; Cochran, A.; Donahue, J. B.; Fazely, A. R.; Garvey, G. T.; Gunasingha, R. M.; Imlay, R.; Kahrimanis, G.; Louis, W. C.; Majkic, R.; Malik, A.; McIlhany, K.; Metcalf, W.; Mills, G. B.; Rupnik, D.; Sandberg, V.; Smith, D.; Somodi, R. F.; Stancu, I.; Strossman, W.; Sung, M.; Tayloe, R.; VanDalen, G.; Vernon, W.; Wadia, N.; White, D. H.; Yellin, S.; Hu, Yi

doi:10.1103/physrevlett.92.091801

Cited by 32 publications

(42 citation statements)

References 11 publications

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“…Unfortunately the sensitivity to |µ νe | is not competitive with that of reactor experiments, that constrain |µ νe | at the level of 10 −11 µ B [37,43]. On the other hand, the best current laboratory limit on |µ νµ | is 6.8 × 10 −10 µ B at 90% CL [37,44], that is only about 5 times smaller than our limit.…”

Section: Neutrino Magnetic Momentscontrasting

confidence: 77%

Neutrino, electroweak, and nuclear physics from COHERENT elastic neutrino-nucleus scattering with refined quenching factor

et al. 2020

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We present an updated analysis of the coherent neutrino-nucleus elastic scattering data of the COHERENT experiment taking into account the refined quenching factor published recently in arXiv:1907.04828. Through a fit of the COHERENT time-integrated energy spectrum, we show that the new improved quenching factor leads to a better determination of the average rms radius of the neutron distributions of 133 Cs and 127 I, while in combination with the atomic parity violation (APV) experimental results it allows to determine a data-driven APV measurement of the low-energy electroweak mixing angle in very good agreement with the Standard Model prediction. We also find a 3.7σ evidence of the suppression of coherence due to the nuclear structure. Neutrino properties are better constrained by considering the COHERENT time-dependent spectral data, that allow us to improve the bounds on the neutrino charge radii and magnetic moments. We also present for the first time constraints on the neutrino charges obtained with coherent neutrino-nucleus elastic scattering data. In particular, we obtain the first laboratory constraints on the diagonal charge of νµ and the νµ-ντ transition charge.

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Section: Neutrino Magnetic Momentscontrasting

confidence: 77%

Neutrino, electroweak, and nuclear physics from COHERENT elastic neutrino-nucleus scattering with refined quenching factor

et al. 2020

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“…On the other hand, massive mediators are largely unconstrained. Accelerator experiments (e.g [32][33]…”

mentioning

confidence: 99%

Higgs phenomenology as a probe of sterile neutrinos

et al. 2019

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Physics beyond the Standard Model can manifest itself as both new light states and heavy degrees of freedom. In this paper, we assume that the former comprise only a sterile neutrino, N . Therefore, the most agnostic description of the new physics is given by an effective field theory built upon the Standard Model fields as well as N . We show that Higgs phenomenology provides a sensitive and potentially crucial tool to constrain effective gauge interactions of sterile neutrinos, not yet probed by current experiments. In parallel, this motivates a range of new Higgs decay channels with clean signatures as candidates for the next LHC runs, including h → γ + p miss T and h → γγ + p miss T .

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“…possible at the Spallation Neutron Source (SNS) at Oakridge National Laboratory (ORNL) [8], which provides an more readily available source of neutrinos of similar energies created out of pions decaying at rest, to perform measurements. All of the experiments mentioned, as well as those performed in the past such as LSND and KARMEN [9,10], have the neutrinos scattering off atomic nuclei ( 40 Ar for DUNE). It is therefore paramount that efforts are undertaken to provide an adequate theoretical modeling of the cross sections describing these processes for both NC…”

Section: Introductionmentioning

confidence: 99%

Lepton kinematics in low-energy neutrino-argon interactions

2020

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Background: Neutrinos in the low-energy regime provide a gateway to a wealth of interesting physics. While plenty of literature exists on detailing the calculation and measurement of total reaction strengths, relatively little attention is paid to the measurement and modeling of the final lepton through differential cross sections at low energies, despite the experimental importance.Purpose: We calculate differential cross sections for low-energy neutrino-nucleus scattering. We examine the role played by forbidden transitions in these distributions and how this differs across different energies and nuclear target masses. Attention is also paid to predictions for typical experimental neutrino spectra.Method: The differential cross sections are calculated within a Continuum Random Phase Approximation framework, which allows us to include collective excitations induced by long-range correlations. The Coulomb interaction of the final lepton in charged current events is treated in an effective way.Results: Kinematic distributions are calculated for 16 O, 40 Ar and 208 Pb. 40 Ar model results are compared for CC (νe, e − ) reactions to events generated by the MARLEY event generator [1], with noticeable discrepancies.Conclusion: Forbidden transitions have a marked effect on the kinematic distributions of the final lepton at low-energy kinematics, such as for DAR neutrinos or for a Fermi-Dirac spectrum at low temperature. This could introduce biases in experimental analyses. Backwards scattering is noticeably more prominent than with MARLEY.

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Search forπ0→νμν¯μDecays in the LSND Detector

Cited by 32 publications

References 11 publications

Neutrino, electroweak, and nuclear physics from COHERENT elastic neutrino-nucleus scattering with refined quenching factor

Neutrino, electroweak, and nuclear physics from COHERENT elastic neutrino-nucleus scattering with refined quenching factor

Higgs phenomenology as a probe of sterile neutrinos

Lepton kinematics in low-energy neutrino-argon interactions

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