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Register a new userMeasurement of $bar{ u}_{mu}$ and $ u_{mu}$ charged current inclusive cross sections and their ratio with the T2K off-axis near detector
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We report a measurement of cross section $sigma( u_{mu}+{rm nucleus}rightarrowmu^{-}+X)$ and the first measurements of the cross section $sigma(bar{ u}_{mu}+{rm nucleus}rightarrowmu^{+}+X)$ and their ratio $R(frac{sigma(bar u)}{sigma( u)})$ at (anti-)neutrino energies below 1.5 GeV. We determine the single momentum bin cross section measurements, averaged over the T2K $bar{ u}/ u$-flux, for the detector target material (mainly Carbon, Oxygen, Hydrogen and Copper) with phase space restricted laboratory frame kinematics of $theta_{mu}<32^circ$ and $p_{mu}>$500 MeV/c. The results are $sigma(bar{ u})=left( 0.900pm0.029{rm (stat.)}pm0.088{rm (syst.)}right)times10^{-39}$ and $sigma( u)=left( 2.41 pm0.022{rm{(stat.)}}pm0.231{rm (syst.)} right)times10^{-39}$ in units of cm$^{2}$/nucleon and $Rleft(frac{sigma(bar{ u})}{sigma( u)}right)= 0.373pm0.012{rm (stat.)}pm0.015{rm (syst.)}$.
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We report a measurement of the flux-integrated $ u_{mu}$ charged-current cross sections on water, hydrocarbon, and iron in the T2K on-axis neutrino beam with a mean neutrino energy of 1.5 GeV. The measured cross sections on water, hydrocarbon, and iron are $sigma^{rm{H_{2}O}}_{rm{CC}}$ = (0.840$pm 0.010$(stat.)$^{+0.10}_{-0.08}$(syst.))$times$10$^{-38}$cm$^2$/nucleon, $sigma^{rm{CH}}_{rm{CC}}$ = (0.817$pm 0.007$(stat.)$^{+0.11}_{-0.08}$(syst.))$times$10$^{-38}$cm$^2$/nucleon, and $sigma^{rm{Fe}}_{rm{CC}}$ = (0.859$pm 0.003$(stat.) $^{+0.12}_{-0.10}$(syst.))$times$10$^{-38}$cm$^2$/nucleon respectively, for a restricted phase space of induced muons: $theta_{mu}<45^{circ}$ and $p_{mu}>$0.4 GeV/$c$ in the laboratory frame. The measured cross section ratios are ${sigma^{rm{H_{2}O}}_{rm{CC}}}/{sigma^{rm{CH}}_{rm{CC}}}$ = 1.028$pm 0.016$(stat.)$pm 0.053$(syst.), ${sigma^{rm{Fe}}_{rm{CC}}}/{sigma^{rm{H_{2}O}}_{rm{CC}}}$ = 1.023$pm 0.012$(stat.)$pm 0.058$(syst.), and ${sigma^{rm{Fe}}_{rm{CC}}}/{sigma^{rm{CH}}_{rm{CC}}}$ = 1.049$pm 0.010$(stat.)$pm 0.043$(syst.). These results, with an unprecedented precision for the measurements of neutrino cross sections on water in the studied energy region, show good agreement with the current neutrino interaction models used in the T2K oscillation analyses.
The electron (anti-)neutrino component of the T2K neutrino beam constitutes the largest background in the measurement of electron (anti-)neutrino appearance at the far detector. The electron neutrino scattering is measured directly with the T2K off-axis near detector, ND280. The selection of the electron (anti-)neutrino events in the plastic scintillator target from both neutrino and anti-neutrino mode beams is discussed in this paper. The flux integrated single differential charged-current inclusive electron (anti-)neutrino cross-sections, $dsigma/dp$ and $dsigma/dcos(theta)$, and the total cross-sections in a limited phase-space in momentum and scattering angle ($p > 300$ MeV/c and $theta leq 45^{circ}$) are measured using a binned maximum likelihood fit and compared to the neutrino Monte Carlo generator predictions, resulting in good agreement.
This paper reports the track multiplicity and kinematics of muons, charged pions, and protons from charged-current inclusive $bar{ u}_{mu}$ and $ u_{mu}$ interactions on a water target, measured using a nuclear emulsion detector in the NINJA experiment. A 3-kg water target was exposed to the T2K antineutrino-enhanced beam with a mean energy of 1.3 GeV. Owing to the high-granularity of the nuclear emulsion, protons with momenta down to 200 MeV/$c$ from the neutrino-water interactions were detected. We find good agreement between the observed data and model predictions for all kinematic distributions other than the number of charged pions. These results demonstrate the capability of measurements with nuclear emulsion to improve neutrino interaction models.
We report a measurement of the $ u_mu$ inclusive charged current cross sections on iron and hydrocarbon in the T2K on-axis neutrino beam. The measured inclusive charged current cross sections on iron and hydrocarbon averaged over the T2K on-axis flux with a mean neutrino energy of 1.51 GeV are $(1.444pm0.002(stat.)_{-0.157}^{+0.189}(syst.))times 10^{-38}mathrm{cm}^2/mathrm{nucleon}$, and $(1.379pm0.009(stat.)_{-0.147}^{+0.178}(syst.))times 10^{-38}mathrm{cm}^2/mathrm{nucleon}$, respectively, and their cross section ratio is $1.047pm0.007(stat.)pm0.035(syst.)$. These results agree well with the predictions of the neutrino interaction model, and thus we checked the correct treatment of the nuclear effect for iron and hydrocarbon targets in the model within the measurement precisions.
We report a measurement of the flux-integrated cross section for inclusive muon neutrino charged-current interactions on carbon. The double differential measurements are given as function of the muon momentum and angle. Relative to our previous publication on this topic, these results have an increased angular acceptance and higher statistics. The data sample presented here corresponds to $5.7 times 10^{20}$ protons-on-target. The total flux-integrated cross section is measured to be $(6.950 pm 0.662) times 10^{-39}$ cm$^2$nucleon$^{-1}$ and is consistent with our simulation.
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