The SciBooNE Collaboration has performed a search for charged current coherent pion production from muon neutrinos scattering on carbon, νµ 12 C → µ −12 Cπ + , with two distinct data samples. No evidence for coherent pion production is observed. We set 90% confidence level upper limits on the cross section ratio of charged current coherent pion production to the total charged current cross section at 0.67 × 10 −2 at mean neutrino energy 1.1 GeV and 1.36 × 10 −2 at mean neutrino energy 2.2 GeV.

The SciBooNE Collaboration reports a measurement of inclusive charged current interactions of muon neutrinos on carbon with an average energy of 0.8 GeV using the Fermilab Booster Neutrino Beam. We compare our measurement with two neutrino interaction simulations: NEUT and NUANCE. The charged current interaction rates (product of flux and cross section) are extracted by fitting the muon kinematics, with a precision of 6-15% for the energy dependent and 3% for the energy integrated analyses. We also extract CC inclusive interaction cross sections from the observed rates, with a precision of 10-30% for the energy dependent and 8% for the energy integrated analyses. This is the first measurement of the CC inclusive cross section on carbon around 1 GeV. These results can be used to convert previous SciBooNE cross section ratio measurements to absolute cross section values.

The MiniBooNE and SciBooNE collaborations report the results of a joint search for short base-43 line disappearance ofνµ at Fermilab's Booster Neutrino Beamline. The MiniBooNE Cherenkov 44 detector and the SciBooNE tracking detector observe antineutrinos from the same beam, therefore 45 the combined analysis of their datasets serves to partially constrain some of the flux and cross sec-46 tion uncertainties. Uncertainties in the νµ background were constrained by neutrino flux and cross 47 section measurements performed in both detectors. A likelihood ratio method was used to set a 48 90% confidence level upper limit onνµ disappearance that dramatically improves upon prior limits 49 in the ∆m 2 =0.1-100 eV 2 region.Recently there has been increasing evidence in sup-2 port of neutrino oscillations in the ∆m 2 ≈ 1 eV 2 re-3 gion. The LSND [1] experiment observed an excess of 4ν e -like events in aν µ beam. MiniBooNE [2-4] has ob-5 served an excess of ν e -like andν e -like events, in a ν µ 6 beam andν µ beam, respectively. Additional evidence for 7 short-baseline anomalies with L/E ≈ 1, where L is the 8 neutrino path length in km and E the neutrino energy 9 in GeV, includes the deficit of events observed in reac-10 tor antineutrino experiments [5] and radioactive source 11 neutrino measurements [6]. If these anomalies are due 12 to neutrino oscillations in the ∆m 2 ≈ 1 eV 2 range, then 13 they could imply the existence of one or more new ster-14 ile neutrino species that do not participate in standard 15 weak interactions but mix with the known neutrino fla-16 vors through additional mass eigenstates. Observation 17 of ν µ (ν µ ) disappearance in conjunction with ν e (ν e ) ap-18 pearance in this ∆m 2 range would be a smoking-gun for 19 the presence of these sterile neutrinos. Alternatively, con-20 straining ν µ (ν µ ) disappearance can, along with global ν e 21 (ν e ) disappearance data, constrain the oscillation inter-22 pretation of the ν e (ν e ) appearance signals in LSND and 23 MiniBooNE [7]. 24 Searches for ν µ andν µ disappearance in MiniBooNE 25 were performed in 2009 [8]. No evidence for disappear-26 ance was found. The search for ν µ disappearance was 27 recently repeated in MiniBooNE with the inclusion of 28 data from the SciBooNE detector in a joint analysis [9]. 29 Once again, the results were consistent with no ν µ dis-30 appearance. The analysis presented here is an improved 31 search forν µ disappearance using data from MiniBooNE 32 12 mented scintillator tracker (SciBar), an electromagnetic 13 calorimeter (EC), and a muon range detector (MRD).14 The SciBar subdetector [13] consists of 14336 extruded 15 polystyrene (C 8 H 8 ) strips arranged vertically and hor-16 izontally to construct a 3 × 3 × 1.7m 3 volume. Each 17 scintillator strip is read out by a wavelength shifting 18 fiber attached to a 64-channel multianode PMT (MA-19 PMT). The 15 ton SciBar subdetector (10.6 ton fiducial 20 FIG. 3. Schematic view of the MiniBooNE detector. volume) provides the primary interaction target. The 1 EC subde...

The SciBooNE Collaboration reports a measurement of neutral current coherent π 0 production on carbon by a muon neutrino beam with average energy 0.8 GeV. The separation of coherent from inclusive π 0 production has been improved by detecting recoil protons from resonant π 0 production. We measure the ratio of the neutral current coherent π 0 production to total charged current cross sections to be (1.16 ± 0.24) × 10 −2 . The ratio of charged current coherent π + to neutral current coherent π 0 production is calculated to be 0.14 +0.30 −0.28 , using our published charged current coherent pion measurement.PACS numbers: 13.15.+g, 13.60. Le, 25.30.Pt, 95.55.Vj * Present address: DSM/Irfu/SPP,

No abstract