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The Sciboone Experiment

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The Sciboone Experiment The SciBooNE Experiment An Overview Jose Luis Alcaraz Aunion on behalf of the SciBooNE collaboration 1 Outline ● The SciBooNE experiment. ● Physics motivations – neutrino physics – anti-neutrino physics ● Experiment description – Booster Neutrino Beam line. – Detector description. – SciBooNE events. ● SciBooNE status ● The SciBooNE collaboration – spanish contribution 2 The SciBooNE experiment ● SciBooNE: – SciBar Booster Neutrino Experiment. ● kind of experiment: – A neutrino scattering experiment. ● main feature: – Combination of the Booster Neutrino Beam (used by MiniBooNE) at Fermilab and the SciBar detector from K2K experiment. ● main goal: – precise study of the neutrino/anti-neutrino-nucleus cross sections at the energies around 1 GeV. ● design and construction period: – proposal Dec 2005, running Jun. 2007. 3 PHYSICS MOTIVATIONS 4 Neutrino mode ● to report precise s measurements n (~5%) at low energies (~ 1 GeV), mapping the region. – more s data could help to n understand better the nuclear effects at low energy regions. ● to measure the contamination ne (kaon decay) from BNB, cross- MINOS, NuMI checking the MiniBooNE predictions. (K2K, Nova) (SciBooNE, MiniBooNE, T2K) 5 exploring the same energy region Neutrino mode ● to reach precision on the oscillation parameters obtained from n m disappearance measurements: – errors on s 's affects the oscillation parameters values. n measurements nm spectrum oscillation nm CCQE parameters Applying to T2K CCQE background: CC1p uncertainty (same energy (CC non-QE events) s(CC1p) region) +-5% +-20% only statistics errors Shift in the measurement of the atmospheric oscillation parameters for 6 different errors assumed in the non-QE/QE ratio. Anti-neutrino mode ν µ+ ● First anti-neutrino measurements at CC-QE: µ + p + n energies around 1 GeV (together with MiniBooNE). ● Helping to MiniBooNE: High capability to distinguish the signal (right sign) from the background (wrong sign). ν QE: ~80% ν QE: ~80% ν BG: ~7% NO DATA for ` nCCQE ` ν+p→µ++n ν+n→µ-+p around 1 GeV Measurement of the n contamination for MiniBooNE measurements. 7 EXPERIMENT DESCRIPTION 8 SciBooNE Beam Line peak E ~ 0.75 GeV MiniBooNE SciBooNE BOOSTER m 00 ~1 Ep~ 8 GeV n mode: 1x 1020 POT ` n mode : 1 x 1020 POT ●beryllium target ●switchable-polarity horn 9 SciBooNE Detectors MRD SciBar n Muon Electron Range Detector SciBar Catcher (EC) (MRD) SciBar installation in the 10 SciBooNE hall. SciBar Detector ➔ Fully active fine-segmented tracker. ➔ Neutrino target. Total Weight (15t) ➔ Scintillator strips with WLS fiber 3m readout. ➔ 2.5 x 1.3 x 300 cm3 scintillator strip. ➔ 14,336 channels (strips). ➔ 64 layers. Each layer consists of m two planes with 112 strips glued 3 together to give vertical and horizontal position. ➔ Detect short tracks (>8cm) ➔ p/π separation by dE/dx. 1.7m 11 ➔ Originally used in K2K experiment. MRD and EC ➔ New detector built at Fermilab. Total Weight 40 t ➔ 12 iron plates (305 x 274 x 5 cm3) sandwiched between vertical and horizontal scintillator layers. ➔ m A total of 60 cm of iron, to stop muons with energy up to ~1 GeV. 4 ➔ Energy resolution ~ 100 MeV. 3 .5 m ➔ Total 362 channels. 1.5 m ➔ Detector coming from K2K ➔ 2 planes with 32 horizontal and 32 vertical modules of lead-scintillator Fibers cm fibers. 2 6 2 ➔ Thickness equivalent to 11X0. ν m Beam c 8 12 ➔ Expected resolution 14%/√E. 4 cm Readout Cell SciBooNE Events Neutrino Mode: 1 x 1020 POT # of interactions in 10 ton Fiducial Volume νµ ~156,000 ν e~ 1400 20 cf. K2K-SciBar (0.2×10 POT) : ~25,000 νµ Anti-neutrino Mode: 1 x 1020 POT # of interactions in FV ` νµ ~26,000 νµ ~14,000 (35%) 13 SCIBOONE STATUS 14 SciBooNE Status:Data taken •Run I (Jun. 8 - Aug. 3, 2007) ● Anti-neutrino mode Delivered POT during run I (Jun. 8 - Aug. 3, ● Delivered 0.545x1020 POT. 2007) ● Detector live time fraction: ∼95%. ● POT corrected event rate is within ~10% variation ±10% Half of projected for RY INA anti-neutrino mode! ELIM Y PR VER stable within 10% 15 Event Display I SciBar EC MRD n-CCQE reconstructed event (dominant channel) p ` n SciBar EC MRD m 16 SciBar EC MRD Event Display II ` n-CCQE reconstructed event p n ` n SciBar EC MRD m This case, the neutron has enough energy to travel certain distance and to transfer the rest of its energy to a proton. 17 SciBooNE collaboration •Universitat Autonoma de Barcelona •University of Cincinnati •University of Colorado •Columbia University •Fermi National Accelerator Laboratory •High Energy Accelerator Research Organization (KEK) •Imperial College London* •Indiana University •Institute for Cosmic Ray Research •Kyoto University* •Los Alamos National Laboratory •Louisiana State University •Purdue University Calumet •Università degli Studi di Roma and INFN-Roma •Saint Mary’s University of Minnesota •Tokyo Institute of Technology Spokespeople: •Universidad de Valencia T. Nakaya, Kyoto University M.O. Wascko, Imperial College 18 institutions 18 Spanish contribution ● developed of the SciBooNE framework for event reconstruction and data analysis. ● database support. ● analysis on: – charged current quasi-elastic interactions and study of the axial structure of the nucleon. – p0 production on charged and neutral currents. – overall physics analysis coordination (M. Sorel). 19 SciBooNE news ● SciBooNE has just started again to take data: – Run II (October): neutrino mode. ● With the available data, an exciting period starts to reach our goals. 20.
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