Short baseline neutrino oscillations and a new light gauge boson

Nelson, Ann E.; Walsh, Jonathan R.

doi:10.1103/physrevd.77.033001

Cited by 64 publications

(52 citation statements)

References 111 publications

(121 reference statements)

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“…In particular, from a modelbuilder's point of view, new particles at or above the electroweak scale are rather unlikely to have a sizable effect on the neutrino sector [28,29]. On the other hand, new physics at JHEP03(2011)013 a low scale may still lead to large NSI [26,27], and since neutrino physics has taught us in the past that theorists' prejudices may be wrong, one cannot discard such possibilities.…”

Section: Jhep03(2011)013mentioning

confidence: 99%

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Two experiments for the price of one? The role of the second oscillation maximum in long baseline neutrino experiments

Huber,

Kopp

2011

J. High Energ. Phys.

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Abstract:We investigate the quantitative impact that data from the second oscillation maximum has on the performance of wide band beam neutrino oscillation experiments. We present results for the physics sensitivities to standard three flavor oscillation, as well as results for the sensitivity to non-standard interactions. The quantitative study is performed using an experimental setup similar to the Fermilab to DUSEL Long Baseline Neutrino Experiment (LBNE). We find that, with the single exception of sensitivity to the mass hierarchy, the second maximum plays only a marginal role due to the experimental difficulties to obtain a statistically significant and sufficiently background-free event sample at low energies. This conclusion is valid for both waterČerenkov and liquid argon detectors. Moreover, we confirm that non-standard neutrino interactions are very hard to distinguish experimentally from standard three-flavor effects and can lead to a considerable loss of sensitivity to θ 13 , the mass hierarchy and CP violation.

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Section: Jhep03(2011)013mentioning

confidence: 99%

“…Some types of low-scale new physics can also be parametrized that way [26,27]. A well known example for the use of effective theory is the Fermi theory of nuclear beta decay.…”

Section: Non-standard Interactionsmentioning

confidence: 99%

Two experiments for the price of one? The role of the second oscillation maximum in long baseline neutrino experiments

Huber,

Kopp

2011

J. High Energ. Phys.

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“…The matter effects due to light mediators have been studied before [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The mediators, mostly considered in the literature, are new gauge bosons of the lepton numbers L e −L µ , L µ −L τ or L τ −L e .…”

Section: Introductionmentioning

confidence: 99%

Wolfenstein potentials for neutrinos induced by ultra-light mediators

Smirnov

2019

J. High Energ. Phys.

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New physics can emerge at low energy scales, involving very light and very weakly interacting new particles. These particles can mediate interactions between neutrinos and usual matter and contribute to the Wolfenstein potential relevant for neutrino oscillations. We compute the Wolfenstein potential in the presence of ultra-light scalar and vector mediators and study the dependence of the potential on the mediator mass m A , taking the finite size of matter distribution (Earth, Sun, supernovae) into consideration. For ultra-light mediators with m −1 A comparable to the size of the medium (R), the usual m −2 A dependence of the potential is modified. In particular, when m −1 A R, the potential does not depend on m A . Taking into account existing bounds on light mediators, we find that for the scalar case significant effects on neutrino propagation are not possible, while for the vector case large matter effects are allowed for m A ∈ [2 × 10 −17 , 4 × 10 −14 ] eV and the gauge coupling g ∼ 10 −25 . arXiv:1909.07505v2 [hep-ph]

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“…Triggered by these problems many ideas and scenarios have been proposed in order to explain LSND, some of them involving very exotic physics. This includes sterile neutrino decay [18,19], violation of the CPT [20] and/or Lorentz [21] symmetries, mass-varying neutrinos [22], short-cuts of sterile neutrinos in extra dimensions [23], a non-standard energy dependence of the sterile neutrino parameters [24], or sterile neutrinos interacting with a new gauge boson [25].…”

Section: Introductionmentioning

confidence: 99%

Reconciling results of LSND, MiniBooNE and other experiments with soft decoherence

Farzan

Schwetz

Smirnov

2008

J. High Energy Phys.

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Abstract:We propose an explanation of the LSND signal via quantum-decoherence of the mass states, which leads to damping of the interference terms in the oscillation probabilities. It is assumed that decoherence mainly affects the state ν 3 (oscillations with the atmospheric ∆m 2 ) and damping effects rapidly decrease with the neutrino energy (the decoherence parameter γ ∝ E −4 ν ). This allows us to reconcile the positive LSND signal with MiniBooNE and other null-result experiments. The standard explanations of solar, atmospheric, KamLAND and MINOS data are not affected. No new particles, and in particular, no sterile neutrinos are needed. The model does not explain the low-energy MiniBooNE anomaly and does not resolve the LSND-KARMEN tension. The LSND signal is controlled by the 1-3 mixing angle θ 13 and, depending on the degree of damping, yields 0.0014 < sin 2 θ 13 < 0.034 at 3σ. The scenario can be tested at upcoming θ 13 searches: while the comparison of near and far detector measurements at reactors should lead to a nullresult a positive signal for θ 13 is expected in long-baseline accelerator experiments. The proposed decoherence may partially explain the results of Gallium detector calibrations and it can strongly affect supernova neutrino signals.

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Short baseline neutrino oscillations and a new light gauge boson

Cited by 64 publications

References 111 publications

Two experiments for the price of one? The role of the second oscillation maximum in long baseline neutrino experiments

Two experiments for the price of one? The role of the second oscillation maximum in long baseline neutrino experiments

Wolfenstein potentials for neutrinos induced by ultra-light mediators

Reconciling results of LSND, MiniBooNE and other experiments with soft decoherence

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