Atmospheric Neutrino Oscillations at Super-Kamiokande

Wendell, R.

doi:10.22323/1.236.1062

Cited by 4 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Extrapolating from the atmospheric neutrino data of Super-K [10], we derive the expected number of background events at other experiments. Since the signal is analyzed within an angle θ C of the GC, we only look at the fraction of background events that fall into the same solid angle…”

Section: Detection Prospects For Current and Future Experimentsmentioning

confidence: 99%

(In)direct detection of boosted dark matter

Agashe

Cui

Necib

et al. 2014

J. Cosmol. Astropart. Phys.

190

283

View full text Add to dashboard Cite

We present a new multi-component dark matter model with a novel experimental signature that mimics neutral current interactions at neutrino detectors. In our model, the dark matter is composed of two particles, a heavier dominant component that annihilates to produce a boosted lighter component that we refer to as boosted dark matter. The lighter component is relativistic and scatters off electrons in neutrino experiments to produce Cherenkov light. This model combines the indirect detection of the dominant component with the direct detection of the boosted dark matter. Directionality can be used to distinguish the dark matter signal from the atmospheric neutrino background. We discuss the viable region of parameter space in current and future experiments.

show abstract

Section: Detection Prospects For Current and Future Experimentsmentioning

confidence: 99%

(In)direct detection of boosted dark matter

Agashe

Cui

Necib

et al. 2014

J. Cosmol. Astropart. Phys.

190

283

View full text Add to dashboard Cite

show abstract

“…Conclusions.-T2K has performed the first search for CP violation in neutrino oscillations using ν μ → ν e appearance and ν μ → ν μ disappearance channels in neutrino and 32 j plane assuming normal ordering, alongside NOνA [43], MINOS+ [44], SK [45], and IceCube [46] confidence regions. and inverted (yellow) mass ordering.…”

mentioning

confidence: 99%

Combined Analysis of Neutrino and Antineutrino Oscillations at T2K

Abe¹,

Amey²,

et al. 2017

View full text Add to dashboard Cite

and comprise 7.482 × 10 20 protons on target in neutrino mode, which yielded in the far detector 32 e-like and 135 μ-like events, and 7.471 × 10 20 protons on target in antineutrino mode, which yielded 4 e-like and 66 μ-like events. Reactor measurements of sin 2 2θ 13 have been used as an additional constraint. The one-dimensional confidence interval at 90% for the phase δ CP spans the range (−3.13, −0.39) for normal mass ordering. The CP conservation hypothesis (δ CP ¼ 0, π) is excluded at 90% C.L.

show abstract

“…The reactor constraint on θ 13 is applied. The T2K contour is compared to the other experiment results (SK [18], MINOS+, NOνA [19] and IceCube DeepCore [20]). In the right plot of Fig.…”

Section: F C F V 1 -R In G E -L Ik E E V Is D E C a Y -Ementioning

confidence: 99%

New results from T2K

Longhin

2017

EPJ Web Conf.

View full text Add to dashboard Cite

Abstract. The T2K experiment is a 295-km long-baseline neutrino experiment in Japan employing an off-axis muon neutrino beam with a ∼ 0.6 GeV peak energy. The beam, produced from 30-GeV protons at the J-PARC complex on the Pacific coast, is directed to the Super-Kamiokande detector. T2K released the first long-baseline measurement of a nonzero value for the θ 13 mixing parameter through the observation of electron neutrino appearance (ν µ → ν e ) and produced the most precise measurement of θ 23 through the observation of muon neutrino disappearance (ν µ → ν µ ). T2K data, in combination with reactor experiments, also excludes at 90% C.L. a significant region of the Dirac CP phase: δ CP < −3.02(−1.87) and δ CP > −0.49(−0.98) for the normal (inverted) hierarchy. A full joint appearance and disappearance fit including both neutrino (7×10 20 protons on target, PoT) and anti-neutrino (4 × 10 20 PoT) data and, for the first time, a constraint from water target data in the near detector, is presented yielding improved sensitivity on δ CP and improved precision on sin 2 2θ 23 and the atmospheric mass splitting. The T2K experimentT2K is a long-baseline neutrino oscillation experiment located in Japan, exploiting 30 GeV protons from the Japan Proton Accelerator Research Center (J-PARC, in Tōkai, Ibaraki Prefecture) to create a muon neutrino beam. The proton beam is directed onto a graphite target and the resulting pions and kaons focussed by a system of three magnetic horns into a 96 m-long decay tunnel filled with helium gas. Depending on the direction of the 250 kA pulsed current, horns can select either positively charged particles, for a beam composed mainly of ν µ (ν-mode), or negatively charged particles, for a beam composed mainly ofν µ (ν-mode).The neutrino beam is measured by two near detectors (INGRID, ND280) located 280 m from the target and a far detector, Super-Kamiokande (SK). The far detector and one of the near detectors (ND280) are placed 2.5 • off-axis with respect to the protons' direction, which results in a narrow neutrino energy spectrum with a peak at about 0.6 GeV. The baseline between neutrino production and the far detector, 295 km, is chosen to correspond to the first minimum in the ν µ survival probability at the peak energy.T2K can measure neutrino oscillation in two channels: ν µ disappearance (ν µ → ν µ ), which is dominated by the oscillation parameters sin 2 2θ 23 and ∆m 2 32 and ν e appearance (ν µ → ν e ), which is sensitive to sin 2 2θ 13 , the octant of θ 23 and through subleading terms to δ CP and the mass hierarchy 1 a e-mail: longhin@pd.infn.it 1 "Normal" mass hierarchy (NH) indicates the ∆m 2 32 , ∆m 2 31 > 0 case (state m 3 having the largest mass) while the other case is denoted as "inverted" mass hierarchy (IH).

show abstract

Atmospheric Neutrino Oscillations at Super-Kamiokande

Cited by 4 publications

References 34 publications

(In)direct detection of boosted dark matter

(In)direct detection of boosted dark matter

Combined Analysis of Neutrino and Antineutrino Oscillations at T2K

New results from T2K

Contact Info

Product

Resources

About