Albert R. Erwin

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This Letter reports results from the MINOS experiment based on its initial exposure to neutrinos from the Fermilab NuMI beam. The rates and energy spectra of charged current nu(mu) interactions are compared in two detectors located along the beam axis at distances of 1 and 735 km. With 1.27 x 10(20) 120 GeV protons incident on the NuMI target, 215 events(More)
We present a series of measurements based on K L,S →␲ ϩ ␲ Ϫ and K L,S →␲ 0 ␲ 0 decays collected in 1996 – 1997 by the KTeV experiment ͑E832͒ at Fermilab. We compare these four K→␲␲ decay rates to measure the direct CP violation parameter Re(⑀Ј/⑀)ϭ(20.7Ϯ2.8)ϫ10 Ϫ4. We also test CPT symmetry by measuring the relative phase between the CP violating and CP(More)
This Letter reports on a search for nu(mu) --> nu(e) transitions by the MINOS experiment based on a 3.14x10(20) protons-on-target exposure in the Fermilab NuMI beam. We observe 35 events in the Far Detector with a background of 27+/-5(stat)+/-2(syst) events predicted by the measurements in the Near Detector. If interpreted in terms of nu(mu) --> nu(e)(More)
The velocity of a 3 GeV neutrino beam is measured by comparing detection times at the near and far detectors of the MINOS experiment, separated by 734 km. A total of 473 far detector neutrino events was used to measure …v ÿ c†=c ˆ 5:1 2:9 10 ÿ5 (at 68% C.L.). By correlating the measured energies of 258 charged-current neutrino events to their arrival times(More)
We found 140 neutrino-induced muons in 854.24 live days in the MINOS far detector, which has an acceptance for neutrino-induced muons of 6:91 10 6 cm 2 sr. We looked for evidence of neutrino disappearance in this data set by computing the ratio of the number of low momentum muons to the sum of the number of high momentum and unknown momentum muons for both(More)
The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the first MINOS observations of and charged-current atmospheric neutrino interactions based on an exposure of 418 days. The ratio of upward-to downward-going events in(More)
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Measurements of differential cross sections for quasielastic electron-deuteron scattering e + d-e + p + n have been made in which recoil protons were detected in coincidence with the scattered electrons. The ratios of the elastic electron-neutron to the electron-proton scattering cross sections are derived from the proton coincidence data. For comparison,(More)