Measurement of the inclusive ν μ charged current cross section on iron and hydrocarbon in the T2K on-axis neutrino beam

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We report a measurement of the ν μ -nucleus inclusive charged-current cross section (¼ σ cc ) on iron using data from the INGRID detector exposed to the J-PARC neutrino beam. The detector consists of 14 modules in total, which are spread over a range of off-axis angles from 0°to 1.1°. The variation in the neutrino energy spectrum as a function of the off-axis angle, combined with event topology information, is used to calculate this cross section as a function of neutrino energy. The cross section is measured to be σ cc ð1.1 GeVÞ ¼ 1.10 AE 0.15 ð10 −38 cm 2 =nucleonÞ, σ cc ð2.0 GeVÞ ¼ 2.07 AE 0.27 ð10 −38 cm 2 =nucleonÞ, and σ cc ð3.3 GeVÞ ¼ 2.29 AE 0.45 ð10 −38 cm 2 =nucleonÞ, at energies of 1.1, 2.0, and 3.3 GeV, respectively. These results are consistent with the cross section calculated by the neutrino interaction generators currently used by T2K. More importantly, the method described here opens up a new way to determine the energy dependence of neutrino-nucleus cross sections.

Section: Discussionmentioning

confidence: 97%

“…So far, the MINOS and T2K experiments have measured the CC inclusive ν μ cross section on iron [1,2] using neutrino beams which cover the few-GeV region. The former experiment measured the CC inclusive cross section for neutrinos with energies above 3.5 GeV using the MINOS near detector.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the muon neutrino inclusive charged-current cross section in the energy range of 1–3 GeV with the T2K INGRID detector

Abe¹,

Andreopoulos²,

Antonova³

et al. 2016

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“…This analysis [83] significantly improves upon the original method established in 2010 [82]. The new track reconstruction algorithm has a higher track reconstruction efficiency and is less susceptible to MPPC dark noise.…”

Section: Event Selectionmentioning

confidence: 99%

“…The correction factor for the event pileup is estimated as a linear function of the beam intensity, since the event-pileup effect is proportional to the beam intensity. The slope of the linear function is estimated from the beam data by combining events to simulate event pileup [83]. The inefficiency due to pileup is less than 1% for all running periods.…”

Section: Correctionsmentioning

confidence: 99%

Measurements of neutrino oscillation in appearance and disappearance channels by the T2K experiment with6.6×1020protons on target

Abe¹,

Adam²,

Aihara³

et al. 2015

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280

376

We report on measurements of neutrino oscillation using data from the T2K long-baseline neutrino experiment collected between 2010 and 2013. In an analysis of muon neutrino disappearance alone, we find the following estimates and 68% confidence intervals for the two possible mass hierarchies: normal hierarchy∶ sin 2 θ 23 ¼ 0.514 þ0.055 −0.056 and Δm 2 32 ¼ ð2.51 AE 0.10Þ × 10 −3 eV 2 =c 4 and inverted hierarchy∶ sin 2 θ 23 ¼ 0.511 AE 0.055 and Δm 2 13 ¼ ð2.48 AE 0.10Þ × 10 −3 eV 2 =c 4 . The analysis accounts for multinucleon mechanisms in neutrino interactions which were found to introduce negligible bias. We describe our first analyses that combine measurements of muon neutrino disappearance and electron neutrino appearance to estimate four oscillation parameters, jΔm 2 j, sin 2 θ 23 , sin 2 θ 13 , δ CP , and the mass hierarchy. Frequentist and Bayesian intervals are presented for combinations of these parameters, with and without including recent reactor measurements. At 90% confidence level and including reactor measurements, we exclude the region δ CP ¼ ½0.15; 0.83 π for normal hierarchy and δ CP ¼ ½−0.08; 1.09 π for inverted hierarchy. The T2K and reactor data weakly favor the normal hierarchy with a Bayes factor of 2.2. The most probable values and 68% one-dimensional credible intervals for the other oscillation parameters, when reactor data are included, are sin 2 θ 23 ¼ 0.528 þ0.055 −0.038 and jΔm 2 32 j ¼ ð2.51 AE 0.11Þ × 10 −3 eV 2 =c 4 .

“…The resulting cross sections are consistent to better than 1% in every bin, which verifies that the extracted cross sections are insensitive to the initially assumed simulated fluxes. Figure 6 compares the measured isoscalar-corrected charged-current inclusive ν μ cross section to the MINOS [17], T2K [52][53][54], CCFR [15], Argoneut [55,56] IHEP-JINR [57], NOMAD [10], NuTeV [16], CDHS [58], and IHEP-ITEP [59] measurements. Not shown are the Gargamelle [60] and SciBooNE [6] results, which reported less precise neutrino cross sections within the plotted energy range.…”

mentioning

confidence: 99%

Measurements of the inclusive neutrino and antineutrino charged current cross sections in MINERvA using the low- ν flux method

Devan

2016

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The total cross sections are important ingredients for the current and future neutrino oscillation experiments. We present measurements of the total charged-current neutrino and antineutrino cross sections on scintillator (CH) in the NuMI low-energy beamline using an in situ prediction of the shape of the flux as a function of neutrino energy from 2-50 GeV. This flux prediction takes advantage of the fact that neutrino and antineutrino interactions with low nuclear recoil energy (ν) have a nearly constant cross section as a function of incident neutrino energy. This measurement is the lowest energy application of the low-ν flux technique, the first time it has been used in the NuMI antineutrino beam configuration, and demonstrates that the technique is applicable to future neutrino beams operating at multi-GeV energies. The cross section measurements presented are the most precise measurements to date below 5 GeV.