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Search Results: 1 - 10 of 586250 matches for " G. A. Horton-Smith "
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The detection of back-to-back proton pairs in Charged-Current neutrino interactions with the ArgoNeuT detector in the NuMI low energy beam line
R. Acciarri,C. Adams,J. Asaadi,B. Baller,T. Bolton,C. Bromberg,F. Cavanna,E. Church,D. Edmunds,A. Ereditato,S. Farooq,B. Fleming,H. Greenlee,G. Horton-Smith,C. James,E. Klein,K. Lang,P. Laurens,R. Mehdiyev,B. Page,O. Palamara,K. Partyka,G. Rameika,B. Rebel,M. Soderberg,J. Spitz,A. M. Szelc,M. Weber,T. Yang,G. P. Zeller
Physics , 2014, DOI: 10.1103/PhysRevD.90.012008
Abstract: Short range nucleon-nucleon correlations in nuclei (NN SRC) carry important information on nuclear structure and dynamics. NN SRC have been extensively probed through two-nucleon knock- out reactions in both pion and electron scattering experiments. We report here on the detection of two-nucleon knock-out events from neutrino interactions and discuss their topological features as possibly involving NN SRC content in the target argon nuclei. The ArgoNeuT detector in the Main Injector neutrino beam at Fermilab has recorded a sample of 30 fully reconstructed charged current events where the leading muon is accompanied by a pair of protons at the interaction vertex, 19 of which have both protons above the Fermi momentum of the Ar nucleus. Out of these 19 events, four are found with the two protons in a strictly back-to-back high momenta configuration directly observed in the final state and can be associated to nucleon Resonance pionless mechanisms involving a pre-existing short range correlated np pair in the nucleus. Another fraction (four events) of the remaining 15 events have a reconstructed back-to-back configuration of a np pair in the initial state, a signature compatible with one-body Quasi Elastic interaction on a neutron in a SRC pair. The detection of these two subsamples of the collected (mu- + 2p) events suggests that mechanisms directly involving nucleon-nucleon SRC pairs in the nucleus are active and can be efficiently explored in neutrino-argon interactions with the LAr TPC technology.
Measurement of muon neutrino and anti-muon neutrino Neutral Current $π^{0} -> γγ$ Production in the ArgoNeuT Detector
R. Acciarri,C. Adams,J. Asaadi,B. Baller,T. Bolton,C. Bromberg,F. Cavanna,E. Church,D. Edmunds,A. Ereditato,S. Farooq,B. Fleming,H. Greenlee,A. Hackenburg,R. Hatcher,G. Horton-Smith,C. James,E. Klein,K. Lang,P. Laurens,R. Mehdiyev,B. Page,O. Palamara,K. Partyka,G. Rameika,B. Rebel,A. Schukraft,M. Soderberg,J. Spitz,A. M Szelc,M. Weber,T. Yang,G. P. Zeller
Physics , 2015,
Abstract: The ArgoNeuT collaboration reports the first measurement of neutral current $\pi^{0}$ production in $\nu_{\mu}$-argon and $\bar{\nu}_{\mu}$-argon scattering. This measurement was performed using the ArgoNeuT liquid argon time projection chamber deployed at Fermilab's 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 $\nu_{\mu}$ of 9.6~GeV and for $\bar{\nu}_{\mu}$ of 3.6~GeV. We compare the measured cross section and kinematic distributions to predictions from the GENIE and NuWro neutrino interaction event generators.
The ArgoNeuT Detector in the NuMI Low-Energy beam line at Fermilab
C. Anderson,M. Antonello,B. Baller,T. Bolton,C. Bromberg,F. Cavanna,E. Church,D. Edmunds,A. Ereditato,S. Farooq,B. Fleming,H. Greenlee,R. Guenette,S. Haug,G. Horton-Smith,C. James,E. Klein,K. Lang,A. Lathrop,P. Laurens,S. Linden,D. McKee,R. Mehdiyev,B. Page,O. Palamara,K. Partyka,S. Pordes,G. Rameika,B. Rebel,B. Rossi,R. Sanders,M. Soderberg,J. Spitz,A. M. Szelc,M. Weber,T. Yang,T. Wongjirad,G. Zeller
Physics , 2012, DOI: 10.1088/1748-0221/7/10/P10019
Abstract: The ArgoNeuT liquid argon time projection chamber has collected thousands of neutrino and antineutrino events during an extended run period in the NuMI beam-line at Fermilab. This paper focuses on the main aspects of the detector layout and related technical features, including the cryogenic equipment, time projection chamber, read-out electronics, and off-line data treatment. The detector commissioning phase, physics run, and first neutrino event displays are also reported. The characterization of the main working parameters of the detector during data-taking, the ionization electron drift velocity and lifetime in liquid argon, as obtained from through-going muon data complete the present report.
First Measurements of Inclusive Muon Neutrino Charged Current Differential Cross Sections on Argon
C. Anderson,M. Antonello,B. Baller,T. Bolton,C. Bromberg,F. Cavanna,E. Church,D. Edmunds,A. Ereditato,S. Farooq,B. Fleming,H. Greenlee,R. Guenette,S. Haug,G. Horton-Smith,C. James,E. Klein,K. Lang,P. Laurens,S. Linden,D. McKee,R. Mehdiyev,B. Page,O. Palamara,K. Partyka,A. Patch,G. Rameika,B. Rebel,B. Rossi,M. Soderberg,J. Spitz,A. M. Szelc,M. Weber,T. Yang,G. Zeller
Physics , 2011, DOI: 10.1103/PhysRevLett.108.161802
Abstract: The ArgoNeuT collaboration presents the first measurements of inclusive muon neutrino charged current differential cross sections on argon. Obtained in the NuMI neutrino beamline at Fermilab, the results are reported in terms of outgoing muon angle and momentum. The data are consistent with the Monte Carlo expectation across the full range of kinematics sampled, $0^\circ$$<\theta_\mu$$<36^\circ$ and 0$
Analysis of a Large Sample of Neutrino-Induced Muons with the ArgoNeuT Detector
C. Anderson,M. Antonello,B. Baller,T. Bolton,C. Bromberg,F. Cavanna,E. Church,D. Edmunds,A. Ereditato,S. Farooq,B. Fleming,H. Greenlee,R. Guenette,S. Haug,G. Horton-Smith,C. James,E. Klein,K. Lang,P. Laurens,S. Linden,D. McKee,R. Mehdiyev,B. Page,O. Palamara,K. Partyka,G. Rameika,B. Rebel,B. Rossi,M. Soderberg,J. Spitz,A. M. Szelc,M. Weber,T. Yang,G. P. Zeller
Physics , 2012, DOI: 10.1088/1748-0221/7/10/P10020
Abstract: ArgoNeuT, or Argon Neutrino Test, is a 170 liter liquid argon time projection chamber designed to collect neutrino interactions from the NuMI beam at Fermi National Accelerator Laboratory. ArgoNeuT operated in the NuMI low-energy beam line directly upstream of the MINOS Near Detector from September 2009 to February 2010, during which thousands of neutrino and antineutrino events were collected. The MINOS Near Detector was used to measure muons downstream of ArgoNeuT. Though ArgoNeuT is primarily an R&D project, the data collected provide a unique opportunity to measure neutrino cross sections in the 0.1-10 GeV energy range. Fully reconstructing the muon from these interactions is imperative for these measurements. This paper focuses on the complete kinematic reconstruction of neutrino-induced through-going muons tracks. Analysis of this high statistics sample of minimum ionizing tracks demonstrates the reliability of the geometric and calorimetric reconstruction in the ArgoNeuT detector.
A study of electron recombination using highly ionizing particles in the ArgoNeuT Liquid Argon TPC
R. Acciarri,C. Adams,J. Asaadi,B. Baller,T. Bolton,C. Bromberg,F. Cavanna,E. Church,D. Edmunds,A. Ereditato,S. Farooq,B. Fleming,H. Greenlee,G. Horton-Smith,C. James,E. Klein,K. Lang,P. Laurens,D. McKee,R. Mehdiyev,B. Page,O. Palamara,K. Partyka,G. Rameika,B. Rebel,M. Soderberg,J. Spitz,A. M. Szelc,M. Weber,M. Wojcik,T. Yang,G. P. Zeller
Physics , 2013, DOI: 10.1088/1748-0221/8/08/P08005
Abstract: Electron recombination in highly ionizing stopping protons and deuterons is studied in the ArgoNeuT detector. The data are well modeled by either a Birks model or a modified form of the Box model. The dependence of recombination on the track angle with respect to the electric field direction is much weaker than the predictions of the Jaffe columnar theory and by theoretical-computational simulations.
Measurements of Inclusive Muon Neutrino and Antineutrino Charged Current Differential Cross Sections on Argon in the NuMI Antineutrino Beam
R. Acciarri,C. Adams,J. Asaadi,B. Baller,T. Bolton,C. Bromberg,F. Cavanna,E. Church,D. Edmunds,A. Ereditato,S. Farooq,B. Fleming,H. Greenlee,R. Hatcher,G. Horton-Smith,C. James,E. Klein,K. Lang,P. Laurens,R. Mehdiyev,B. Page,O. Palamara,K. Partyka,G. Rameika,B. Rebel,M. Soderberg,J. Spitz,A. M. Szelc,M. Weber,T. Yang,G. P. Zeller
Physics , 2014, DOI: 10.1103/PhysRevD.89.112003
Abstract: The ArgoNeuT collaboration presents measurements of inclusive muon neutrino and antineutrino charged current differential cross sections on argon in the Fermilab NuMI beam operating in the low energy antineutrino mode. The results are reported in terms of outgoing muon angle and momentum at a mean neutrino energy of 9.6 GeV (neutrinos) and 3.6 GeV (antineutrinos), in the range $0^\circ < \theta_\mu < 36^\circ$ and $0 < p_\mu < 25$ GeV/$c$, for both neutrinos and antineutrinos.
First Measurement of Neutrino and Antineutrino Coherent Charged Pion Production on Argon
R. Acciarri,C. Adams,J. Asaadi,B. Baller,T. Bolton,C. Bromberg,F. Cavanna,E. Church,D. Edmunds,A. Ereditato,S. Farooq,B. Fleming,H. Greenlee,R. Hatcher,G. Horton-Smith,C. James,E. Klein,K. Lang,P. Laurens,R. Mehdiyev,B. Page,O. Palamara,K. Partyka,G. Rameika,B. Rebel,E. Santos,M. Soderberg,J. Spitz,A. M. Szelc,M. Weber,T. Yang,G. P. Zeller
Statistics , 2014, DOI: 10.1103/PhysRevLett.113.261801
Abstract: We report on the first cross section measurements for charged current coherent pion production by neutrinos and antineutrinos on argon. These measurements are performed using the ArgoNeuT detector exposed to the NuMI beam at Fermilab. The cross sections are measured to be $2.6^{+1.2}_{-1.0}(stat)^{+0.3}_{-0.4}(syst) \times 10^{-38} \textrm{cm}^{2}/\textrm{Ar}$ for neutrinos at a mean energy of $9.6$ GeV and $5.5^{+2.6}_{-2.1}(stat)^{+0.6}_{-0.7}(syst) \times 10^{-39} \textrm{cm}^{2}/\textrm{Ar}$ for antineutrinos at a mean energy of $3.6$ GeV.
A compact ultra-clean system for deploying radioactive sources inside the KamLAND detector
T. I. Banks,S. J. Freedman,J. Wallig,N. Ybarrolaza,A. Gando,Y. Gando,H. Ikeda,K. Inoue,Y. Kishimoto,M. Koga,T. Mitsui,K. Nakamura,I. Shimizu,J. Shirai,A. Suzuki,Y. Takemoto,K. Tamae,K. Ueshima,H. Watanabe,B. D. Xu,H. Yoshida,S. Yoshida,A. Kozlov,C. Grant,G. Keefer,A. Piepke,T. Bloxham,B. K. Fujikawa,K. Han,K. Ichimura,H. Murayama,T. O'Donnell,H. M. Steiner,L. A. Winslow,D. A. Dwyer,R. D. McKeown,C. Zhang,B. E. Berger,C. E. Lane,J. Maricic,T. Miletic,M. Batygov,J. G. Learned,S. Matsuno,M. Sakai,G. A. Horton-Smith,K. E. Downum,G. Gratta,Y. Efremenko,O. Perevozchikov,H. J. Karwowski,D. M. Markoff,W. Tornow,K. M. Heeger,J. A. Detwiler,S. Enomoto,M. P. Decowski
Physics , 2014, DOI: 10.1016/j.nima.2014.09.068
Abstract: We describe a compact, ultra-clean device used to deploy radioactive sources along the vertical axis of the KamLAND liquid-scintillator neutrino detector for purposes of calibration. The device worked by paying out and reeling in precise lengths of a hanging, small-gauge wire rope (cable); an assortment of interchangeable radioactive sources could be attached to a weight at the end of the cable. All components exposed to the radiopure liquid scintillator were made of chemically compatible UHV-cleaned materials, primarily stainless steel, in order to avoid contaminating or degrading the scintillator. To prevent radon intrusion, the apparatus was enclosed in a hermetically sealed housing inside a glove box, and both volumes were regularly flushed with purified nitrogen gas. An infrared camera attached to the side of the housing permitted real-time visual monitoring of the cable's motion, and the system was controlled via a graphical user interface.
7Be Solar Neutrino Measurement with KamLAND
A. Gando,Y. Gando,H. Hanakago,H. Ikeda,K. Inoue,K. Ishidoshiro,H. Ishikawa,Y. Kishimoto,M. Koga,R. Matsuda,S. Matsuda,T. Mitsui,D. Motoki,K. Nakajima,K. Nakamura,A. Obata,A. Oki,Y. Oki,M. Otani,I. Shimizu,J. Shirai,A. Suzuki,K. Tamae,K. Ueshima,H. Watanabe,B. D. Xu,S. Yamada,Y. Yamauchi,H. Yoshida,A. Kozlov,Y. Takemoto,S. Yoshida,C. Grant,G. Keefer,D. W. McKee,A. Piepke,T. I. Banks,T. Bloxham,S. J. Freedman,B. K. Fujikawa,K. Han,L. Hsu,K. Ichimura,H. Murayama,T. O'Donnell,H. M. Steiner,L. A. Winslow,D. Dwyer,C. Mauger,R. D. McKeown,C. Zhang,B. E. Berger,C. E. Lane,J. Maricic,T. Miletic,J. G. Learned,M. Sakai,G. A. Horton-Smith,A. Tang,K. E. Downum,K. Tolich,Y. Efremenko,Y. Kamyshkov,O. Perevozchikov,H. J. Karwowski,D. M. Markoff,W. Tornow,J. A. Detwiler,S. Enomoto,K. Heeger,M. P. Decowski
Physics , 2014, DOI: 10.1103/PhysRevC.92.055808
Abstract: We report a measurement of the neutrino-electron elastic scattering rate of 862 keV 7Be solar neutrinos based on a 165.4 kton-day exposure of KamLAND. The observed rate is 582 +/- 90 (kton-day)^-1, which corresponds to a 862 keV 7Be solar neutrino flux of (3.26 +/- 0.50) x 10^9 cm^-2s^-1, assuming a pure electron flavor flux. Comparing this flux with the standard solar model prediction and further assuming three flavor mixing, a nu_e survival probability of 0.66 +/- 0.14 is determined from the KamLAND data. Utilizing a global three flavor oscillation analysis, we obtain a total 7Be solar neutrino flux of (5.82 +/- 0.98) x 10^9 cm^-2s^-1, which is consistent with the standard solar model predictions.
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