The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2

Allison, W.W.M.; Alner, G. J.; Ayres, D. S.; Barr, G.; Barrett, W. L.; Bode, C.; Border, P.; Brooks, C.B.; Cobb, J.H.; Cotton, R.; Courant, H.; DeMuth, D. M.; Fields, T.; Gallagher, H.; García, C.; Goodman, M. C.; Gran, R.; Joffe–Minor, T.; Kafka, T.; Kasahara, S. M S; Leeson, W.; Litchfield, P. J.; Longley, N. P.; Mann, W. A.; Маршак, М. Л.; Milburn, R. H.; Miller, William H.; Mualem, L.; Napier, A.; Oliver, W. P.; Pearce, G. F.; Peterson, E. A.; Petyt, D.; Price, L. E.; Ruddick, K.; Sanchez, M. C.; Schneps, J.; Schub, M. H.; Seidlein, R.; Stassinakis, A.; Thron, J. L.; Vassiliev, V. V.; Villaume, G.; Wakely, S. P.; Wall, D.; West, N.; Wielgosz, U.M.

doi:10.1016/s0370-2693(99)00056-8

Cited by 300 publications

(89 citation statements)

References 13 publications

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“…However, recently the KamLAND experiment [25] observed indications in favor of distance and energy dependent oscillations in vacuum of reactor antineutrinos due to the same mass-squared difference responsible of solar neutrino oscillations. Distance and energy dependent flavor-changing transitions have been also observed in the Super-Kamiokande [29], Soudan 2 [5] and MACRO [7] atmospheric neutrino experiments and in the long-baseline experiment K2K [4]. These experimental evidences show without any doubt that the arguments presented in Ref.…”

Section: Energy Of Massive Neutrinossupporting

confidence: 68%

Coherence and Wave Packets in Neutrino Oscillations

Giunti

2004

Foundations of Physics Letters

111

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Section: Energy Of Massive Neutrinossupporting

confidence: 68%

Coherence and Wave Packets in Neutrino Oscillations

Giunti

2004

Foundations of Physics Letters

111

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“…From MACRO we use the through-going muon sample divided in 10 angular bins [14]. We did not include in our fit the results of other atmospheric neutrino experiments, such as the recent 5.9 kton-yr data from Soudan-2 [47], since at the moment the statistics is completely dominated by Super-Kamiokande [38]. Furthermore, some of the older experiments have no angular sensitivity, and thus can not be used to discriminate between active and sterile neutrino conversion, our main goal.…”

Section: B Data and Analysismentioning

confidence: 99%

Constraining neutrino oscillation parameters with current solar and atmospheric data

et al. 2003

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We analyze the impact of recent solar and atmospheric data in the determination of the neutrino oscillation parameters, taking into account that both the solar ν e and the atmospheric ν µ may convert to a mixture of active and sterile neutrinos. We use the most recent global solar neutrino data, including the 1496-day Super-K neutrino data sample, and we investigate in detail the impact of the recent SNO neutral current, spectral and day/night data by performing also an analysis using only the charged current rate from SNO. We confirm the clear preference of the pure active LMA solution of the solar neutrino problem and obtain that the LOW, VAC, SMA and Just-So 2 solutions are disfavored with a ∆χ 2 = 9, 9, 23, 31, respectively. Furthermore, we find that the global solar data constrains the admixture of a sterile neutrino to be less than 44% at 99% C.L..A pure sterile solution is ruled out with respect to the active one at 99.997% C.L.. By performing an improved fit of the atmospheric data, we also update the corresponding regions of oscillation parameters. We find that the recent atmospheric Super-K (1489-day) and MACRO data have a strong impact on constraining a sterile component in atmospheric oscillations: if the ν µ is restricted to the atmospheric mass states only a sterile admixture of 16% is allowed at 99% C.L., while a bound of 35% is obtained in the unconstrained case. Pure sterile oscillations are disfavored with a ∆χ 2 = 34.6 compared to the pure active case.In the appendix we discuss the implications of the first 145.1 days of KamLAND data on the determination of the solar neutrino parameters. The inclusion of KamLAND enhances the rejection of non-LMA-MSW solutions by 13 units in ∆χ 2 . The bound on the sterile neutrino fraction is practically unaffected in the boron-fixed case, while it improves from 61% to 51% in the boron-free case.

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“…If one considers the box diagrams for µ → eν lνl , which gives the same result as in Eq. (15), namely…”

Section: The Anomalous Muon Decay and Lsndmentioning

confidence: 99%

“…The experimental evidence of the neutrino masses comes, from three anomalous effects; LSND excess [11,12], atmospheric neutrino anomaly [13,14,15] and the solar neutrino deficit [16,17,18,19].…”

Section: Introductionmentioning

confidence: 99%

Role of lepton flavor violating muon decay in the seesaw model and LSND

Aslam¹,

Riazuddin²

2002

Phys. Rev. D

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The aim of the work is to study LFV in a newly proposed Seesaw model of neutrino mass and to see whether it could explain LSND excess. The motivation of this Seesaw model was that there was no new physics beyond the TeV scale. By studying µ → 3e in this model, it is shown that the upper bound on the branching ratio requires Higgs mass m h of a new scalar doublet with lepton number L = −1 needed in the model has to be about 9 TeV. The predicted branching ratio for µ → eν lνl is too small to explain the LSND.

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The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2

Cited by 300 publications

References 13 publications

Coherence and Wave Packets in Neutrino Oscillations

Coherence and Wave Packets in Neutrino Oscillations

Constraining neutrino oscillation parameters with current solar and atmospheric data

Role of lepton flavor violating muon decay in the seesaw model and LSND

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