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Register a new userFirst measurement using a nuclear emulsion detector of the $ u_{mu}$ charged-current cross section on iron around the 1$,$GeV energy region
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We have carried out $ u_{mu}$ charged-current interaction measurement on iron using an emulsion detector exposed to the T2K neutrino beam in the J-PARC neutrino facility. The data samples correspond to 4.0$times$10$^{19}$ protons on target, and the neutrino mean energy is 1.49$,$GeV. The emulsion detector is suitable for precision measurements of charged particles produced in neutrino-iron interactions with a low momentum threshold thanks to thin-layered structure and sub-$mu$m spatial resolution. The charged particles are successfully detected, and their multiplicities are measured using the emulsion detector. The cross section was measured to be $sigma^{mathrm{Fe}}_{mathrm{CC}} = (1.28 pm 0.11({mathrm{stat.}})^{+0.12}_{-0.11}({mathrm{syst.}})) times 10^{-38} , {mathrm{cm}}^{2}/{mathrm{nucleon}}$. The cross section in a limited kinematic phase space of induced muons, $theta_{mu} < 45^{circ}$ and $p_{mu} > 400 , {rm MeV}/c$, on iron was $sigma^{mathrm{Fe}}_{mathrm{CC hspace{1mm} phase hspace{0.5mm} space}} = (0.84 pm 0.07({mathrm{stat.}})^{+0.07}_{-0.06}({mathrm{syst.}})) times 10^{-38} , {mathrm{cm}}^{2}/{mathrm{nucleon}}$. The cross-section results are consistent with previous values obtained via different techniques using the same beamline, and they are well reproduced by current neutrino interaction models. These results demonstrate the capability of the detector towards the detailed measurements of the neutrino-nucleus interactions around the 1$,$GeV energy region.
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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.
This paper reports the first differential measurement of the charged-current interaction cross section of $ u_{mu}$ on water with no pions in the final state. This flux-averaged measurement has been made using the T2K experiments off-axis near detector, and is reported in doubly-differential bins of muon momentum and angle. The flux-averaged total cross section in a restricted region of phase space was found to be $ sigma= (0.95 pm 0.08 (mbox{stat}) pm 0.06 (mbox{det. syst.}) pm 0.04(mbox{model syst.}) pm{} 0.08(mbox{flux}) ) times 10^{-38} mbox{cm}^2$ per n.
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.
The semi-exclusive channel $ u_{mu}+textrm{CH}rightarrowmu^{-}pi^{0}+textrm{nucleon(s)}$ is analyzed using MINERvA exposed to the low-energy NuMI $ u_{mu}$ beam with spectral peak at $E_{ u} simeq 3$ GeV. Differential cross sections for muon momentum and production angle, $pi^{0}$ kinetic energy and production angle, and for squared four-momentum transfer are reported, and the cross section $sigma(E_{ u})$ is obtained over the range 1.5 GeV $leq E_{ u} <$ 20 GeV. Results are compared to GENIE and NuWro predictions and to published MINERvA cross sections for $ u_{mu}textrm{-CC}(pi^{+})$ and $bar{ u}_{mu}textrm{-CC}(pi^{0})$. Disagreements between data and simulation are observed at very low and relatively high values for muon angle and for $Q^2$ that may reflect shortfalls in modeling of interactions on carbon. For $pi^{0}$ kinematic distributions however, the data are consistent with the simulation and provide support for generator treatments of pion intranuclear scattering. Using signal-event subsamples that have reconstructed protons as well as $pi^{0}$ mesons, the $ppi^{0}$ invariant mass distribution is obtained, and the decay polar and azimuthal angle distributions in the rest frame of the $ppi^{0}$ system are measured in the region of $Delta(1232)^+$ production, $W < 1.4$ GeV.
We report a measurement of the $ u_mu$ charged current quasi-elastic cross-sections on carbon in the T2K on-axis neutrino beam. The measured charged current quasi-elastic cross-sections on carbon at mean neutrino energies of 1.94 GeV and 0.93 GeV are $(11.95pm 0.19(stat.)_{-1.47}^{+1.82} (syst.))times 10^{-39}mathrm{cm}^2/mathrm{neutron}$ and $(10.64pm 0.37(stat.)_{-1.65}^{+2.03} (syst.))times 10^{-39}mathrm{cm}^2/mathrm{neutron}$, respectively. These results agree well with the predictions of neutrino interaction models. In addition, we investigated the effects of the nuclear model and the multi-nucleon interaction.
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