Results on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>ν</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">μ</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mspace /><mml:mo>→</mml:mo><mml:mspace /><mml:mrow><mml:msub><mml:mrow><mml:mi>ν</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">e</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>Neutrino Oscillations from the LSND Experiment

Athanassopoulos, C.; Auerbach, L.; Burman, R. L.; Caldwell, D. O.; Church, E.; Cohen, I.; Donahue, J. B.; Fazely, A. R.; Federspiel, F.J.; Garvey, G. T.; Gunasingha, R. M.; Imlay, R.; Johnston, K.; Kim, H.J.; Louis, W. C.; Majkic, R.; McIlhany, K.; Metcalf, W.; Mills, G. B.; Reeder, R. A.; Sandberg, V.; Smith, D.; Stancu, I.; Strossman, W.; Tayloe, R.; VanDalen, G. J.; Vernon, W.; Wadia, N.; Waltz, James P.; White, D. H.; Works, D.; Xiao, Y. J.; Yellin, S.

doi:10.1103/physrevlett.81.1774

Cited by 696 publications

(645 citation statements)

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“…2(right). We will consider both the "old" and "new" neutrino fluxes to study the potential of the ν µ disappearance channel at this facility to measure the atmospheric parameters θ 23 and ∆m 2 23 . For both fluxes, a UNO-like [45] 1 Mton waterČerenkov detector (with a 440 kton fiducial volume) located inside the Fréjus tunnel with a baseline L = 130 km is considered.…”

Section: The Splmentioning

confidence: 99%

“…It must be reminded, however, that this channel is afflicted by a four-fold degeneracy [20]: the sign of the atmospheric mass difference and the θ 23 -octant are poorly measured through this channel, indeed 2 . It has been proposed to face this problem using atmospheric neutrinos at T2K-II, [21,22], or at a magnetized iron calorimeter, [23,24].…”

Section: Introductionmentioning

confidence: 99%

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disappearance at the SPL, T2K-I, NOνA and the neutrino factory

et al. 2006

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We study the measurement of the atmospheric neutrino oscillation parameters, θ 23 and ∆m 2 23 , at the ν µ disappearance channel at three conventional beam facilities, the SPL, T2K-phase I and NOνA. These two parameters have been shown to be of crucial importance in the measurement of two of the unknowns of the PMNS mixing matrix, θ 13 and the leptonic CP-violating phase δ. In our analyis, the effect of the two discrete ambiguities, sign(∆m 2 23 ) and sign(tan 2θ 23 ), is explicitly taken into account. We analyse also the ν µ disappearance channel at the Neutrino Factory, and combine it with the "golden" ν e → ν µ and "silver" ν e → ν τ appearance channels to study its impact on the measurement of θ 13 and δ. Eventually, we present the sensitivity of the four facilities to different observables: θ 13 , δ, maximal θ 23 , the sign of the atmospheric mass difference, s atm , and the θ 23 -octant, s oct .

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Section: The Splmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

disappearance at the SPL, T2K-I, NOνA and the neutrino factory

et al. 2006

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“…This means we will have an electron neutrino flux suppression of 1/2 for all of the solar neutrinos, and the atmospheric neutrino problem will be due to large ν µ − ν τ mixing. The neutrino masses are too small to make a significant contribution to dark matter, or to the anomaly observed at LSND [23]. Hence we predict that the LSND result will prove to be unfounded.…”

Section: Neutrino Masses and Mixings From An Explicit Modelmentioning

confidence: 93%

“…From the form of texture I we see that this texture would require the imposition of an exact flavour symmetry relating (M ν ) 11 to (M ν ) 23 , for which we have no good reason. Hence we will not use texture I.…”

Section: Neutrino Phenomenologymentioning

confidence: 99%

Neutrino masses and mixings from an anomaly free SMG×U(1)2 model

Froggatt

Gibson

Nielsen³

1999

Physics Letters B

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A natural solution to the fermion mass hierarchy problem suggests the existence of a partially conserved chiral symmetry. We show that this can lead to a reasonably natural solution to the solar and atmospheric neutrino problems without fine-tuning or the addition of new low energy fermions. The atmospheric neutrino atmospheric neutrino anomaly is given by large mixing between ν µ and ν τ , with ∆m 2 atm ∼ 10 −3 eV 2 , and the solar neutrino deficit is due to nearly maximal electron neutrino vacuum oscillations. We present an explicit model for the neutrino masses which is an anomaly free Abelian extension of the standard model that also yields a realistic charged fermion spectrum.

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“…The statistical problem we study occurs in a variety of application areas including: particle and astroparticle physics [1][2][3][4][5][6][7][8][9], isotopic ratio analysis (when the major isotope is large enough so that most of the variability in the ratio is due to the minor isotope) [10,11], detection of low-level radiation [12][13][14][15], and aerosol science and technology [16].…”

Section: Introductionmentioning

confidence: 99%

Frequentist coverage properties of uncertainty intervals for weak Poisson signals in the presence of background

Coakley

Splett

Simons

2010

Meas. Sci. Technol.

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Abstract. We construct uncertainty intervals for weak Poisson signals in the presence of background. We consider the case where a primary experiment yields a realization of the signal plus background, and a second experiment yields a realization of the background. The data acquisitions times, for the background-only experiment, T bg , and the primary experiment, T , are selected so that their ratio, T bg T , varies from 1 to 25. The upper choice of 25 is motivated by an experimental study at the National Institute of Standards and Technology (NIST). The expected number of background counts in the primary experiment varies from 0.2 to 2. We construct 90 and 95 percent confidence intervals based on a propagation-of-errors method as well as two implementations of a Neyman procedure where acceptance regions are constructed based on a likelihood-ratio criterion that automatically determines whether the resulting confidence interval is one-sided or two-sided. In one of the implementations of the Neyman procedure due to Feldman and Cousins, uncertainty in the expected background contribution is neglected. In the other implementation, we account for random uncertainty in the estimated expected background with a parametric bootstrap implementation of a method due to Conrad. We also construct minimum length Bayesian credibility intervals. For each method, we test for the presence of a signal based on the value of the lower endpoint of the uncertainty interval. In general, the propagation-of-errors method performs the worst compared to the other methods according to frequentist coverage and detection probability criteria, and sometimes produces nonsensical intervals where both endpoints are negative. The Neyman procedures generally yield intervals with better frequentist coverage properties compared to the Bayesian method except for some cases where T bg T = 1. In general, the Bayesian method yields intervals with lower detection probabilities compared to Neyman procedures. One of main conclusions is that when T bg T is 5 or more and the expected background is 2 or less, the FC method outperforms the other methods considered. For T bg T = 1, 2 we observe that the Neyman procedure methods yield false detection probabilities for the case of no signal that are higher than expected given the nominal frequentist coverage of the interval. In contrast, for T bg T = 1, 2, the false

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Results onνμ→νeNeutrino Oscillations from the LSND Experiment

Cited by 696 publications

References 10 publications

disappearance at the SPL, T2K-I, NOνA and the neutrino factory

disappearance at the SPL, T2K-I, NOνA and the neutrino factory

Neutrino masses and mixings from an anomaly free SMG×U(1)2 model

Frequentist coverage properties of uncertainty intervals for weak Poisson signals in the presence of background

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