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Register a new userFirst measurement of $bar{ u}_{mu}$ and $ u_{mu}$ charged-current inclusive interactions on water using a nuclear emulsion detector
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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.
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Production of K^{+} mesons in charged-current u_{mu} interactions on plastic scintillator (CH) is measured using MINERvA exposed to the low-energy NuMI beam at Fermilab. Timing information is used to isolate a sample of 885 charged-current events containing a stopping K^{+} which decays at rest. The differential cross section in K^{+} kinetic energy, dsigma/dT_{K}, is observed to be relatively flat between 0 and 500 MeV. Its shape is in good agreement with the prediction by the textsc{genie} neutrino event generator when final-state interactions are included, however the data rate is lower than the prediction by 15%.
The ArgoNeuT collaboration reports the first measurement of neutral current $pi^{0}$ production in $ u_{mu}$-argon and $bar{ u}_{mu}$-argon scattering. This measurement was performed using the ArgoNeuT liquid argon time projection chamber deployed at Fermilabs NuMI neutrino beam with an exposure corresponding to 1.2$times 10^{20}$ protons-on-target from the Fermilab Main Injector and a mean energy for $ u_{mu}$ of 9.6~GeV and for $bar{ u}_{mu}$ of 3.6~GeV. We compare the measured cross section and kinematic distributions to predictions from the GENIE and NuWro neutrino interaction event generators.
We report the first measurement of the flux-integrated cross section of $ u_{mu}$ charged-current single $pi^{0}$ production on argon. This measurement is performed with the MicroBooNE detector, an 85 ton active mass liquid argon time projection chamber exposed to the Booster Neutrino Beam at Fermilab. This result on argon is compared to past measurements on lighter nuclei to investigate the scaling assumptions used in models of the production and transport of pions in neutrino-nucleus scattering. The techniques used are an important demonstration of the successful reconstruction and analysis of neutrino interactions producing electromagnetic final states using a liquid argon time projection chamber operating at the earths surface.
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 $Rleft(frac{sigma(bar{ u})}{sigma( u)}right)= 0.373pm0.012{rm (stat.)}pm0.015{rm (syst.)}$.
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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