Long baseline neutrino oscillation experiment at the AGS. Physics design report

Beavis, D.; Carroll, Adam J.; Chiang, I. H.

doi:10.2172/52878

Cited by 58 publications

(65 citation statements)

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“…The peak neutrino energy can be tuned easily by changing the current of the dipole magnet. The OAB is another option to produce a narrow neutrino energy spectrum [14]. The optics is almost same as the WBB, but the axis of the beam optics is displaced by a few degree from the far detector direction (off-axis).…”

Section: Neutrino Beam At Jhfmentioning

confidence: 99%

The JHF-Kamioka Neutrino Project

Kajita¹

2002

Neutrino Oscillations and Their Origin

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The JHF-Kamioka neutrino project is a second generation long base line neutrino oscillation experiment that probes physics beyond the Standard Model by high precision measurements of the neutrino masses and mixing. A high intensity narrow band neutrino beam is produced by secondary pions created by a high intensity proton synchrotron at JHF (JAERI). The neutrino energy is tuned to the oscillation maximum at ∼1 GeV for a baseline length of 295 km towards the world largest waterČerenkov detector, Super-Kamiokande. Its excellent energy resolution and particle identification enable the reconstruction of the initial neutrino energy, which is compared with the narrow band neutrino energy, through the quasi-elastic interaction. The physics goal of the first phase is an order of magnitude better precision in the ν µ → ν τ oscillation measurement (δ(∆m 2 23 ) = 10 −4 eV 2 and δ(sin 2 2θ 23 ) = 0.01), a factor of 20 more sensitive search in the ν µ → ν e appearance (sin 2 2θ µe ≃ 0.5 sin 2 2θ 13 > 0.003), and a confirmation of the ν µ → ν τ oscillation or discovery of sterile neutrinos by detecting the neutral current events. In the second phase, an upgrade of the accelerator from 0.75 MW to 4 MW in beam power and the construction of 1 Mt Hyper-Kamiokande detector at Kamioka site are envisaged. Another order of magnitude improvement in the ν µ → ν e oscillation sensitivity, a sensitive search of the CP violation in the lepton sector (CP phase δ down to 10 • − 20 • ), and an order of magnitude improvement in the proton decay sensitivity is also expected.

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Section: Neutrino Beam At Jhfmentioning

confidence: 99%

The JHF-Kamioka Neutrino Project

Kajita¹

2002

Neutrino Oscillations and Their Origin

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“…Many studies focus on resolving such degeneracies, e.g. by combining more than one experiment [63][64][65][66][67]75], using more than one detector [53,[57][58][59][60][61], or using information from atmospheric neutrino data [68].…”

Section: Discussionmentioning

confidence: 99%

“…However, statistical errors and realistic efficiencies and backgrounds limit considerably the capabilities of this method. Another detector [53,[57][58][59][60][61][62] or the combination with another experiment [63][64][65][66][67][68][69] would, thus, be necessary. 3 The use of only a neutrino beam could help in resolving the type of hierarchy when two different long-baselines are considered [61][62][63][64].…”

Section: Introductionmentioning

confidence: 99%

Determining the neutrino mass hierarchy andCP-violation inNOνAwith a second off-axis detector

2006

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We consider a Super-NO A-like experimental configuration based on the use of two detectors in a long-baseline experiment as NO A. We take the far detector as in the present NO A proposal and add a second detector at a shorter baseline. The location of the second off-axis detector is chosen such that the ratio L=E is the same for both detectors, being L the baseline and E the neutrino energy. We consider liquid argon and water-Č erenkov techniques for the second off-axis detector and study, for different experimental setups, the detector mass required for the determination of the neutrino mass hierarchy, for different values of 13 . We also study the capabilities of such an experimental setup for determining CP-violation in the neutrino sector. Our results show that by adding a second off-axis detector a remarkable enhancement on the capabilities of the current NO A experiment could be achieved.

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“…This corresponds to the oscillation maximum for the 295 km baseline. T2K is the first experiment designed to use this configuration, called the off-axis technique [12]. This configuration also has the advantage of reducing the beam ν e component in the oscillation region and the high energy neutrino flux which contributes to backgrounds in the oscillation analyses.…”

Section: Experimental Overviewmentioning

confidence: 99%

Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector

Abe¹,

Adam²,

Aihara³

et al. 2014

Phys. Rev. D

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The T2K experiment has reported the first observation of the appearance of electron neutrinos in a muon neutrino beam. The main and irreducible background to the appearance signal comes from the presence in the neutrino beam of a small intrinsic component of electron neutrinos originating from muon and kaon decays. In T2K, this component is expected to represent 1.2% of the total neutrino flux. A measurement of this component using the near detector (ND280), located 280 m from the target, is presented. The charged current interactions of electron neutrinos are selected by combining the particle identification capabilities of both the time projection chambers and electromagnetic calorimeters of ND280. The measured ratio between the observed electron neutrino beam component and the prediction is 1.01 AE 0.10 providing a direct confirmation of the neutrino fluxes and neutrino cross section modeling used for T2K neutrino oscillation analyses. Electron neutrinos coming from muons and kaons decay are also separately measured, resulting in a ratio with respect to the prediction of 0.68 AE 0.30 and 1.10 AE 0.14, respectively.

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Long baseline neutrino oscillation experiment at the AGS. Physics design report

Cited by 58 publications

References 0 publications

The JHF-Kamioka Neutrino Project

The JHF-Kamioka Neutrino Project

Determining the neutrino mass hierarchy andCP-violation inNOνAwith a second off-axis detector

Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector

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