Browsing by Author "Bishai, M."

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Improved measurement of muon antineutrino disappearance in MINOS
(American Physical Society, 2012) Adamson, P.; Ayres, D.S.; Backhouse, C.; Barr, G.; Bishai, M.; Blake, A.; Bock, G.J.; Boehnlein, D.J.; Bogert, D.; Cao, S.V.; Childress, S.; Coelho, J.A.B.; Corwin, L.; Cronin-Hennessy, D.; Danko, I.Z.; De Jong, J.K.; Devenish, N.E.; Diwan, M.V.; Escobar, C.O.; Evans, J.J.; Falk, E.; Feldman, G.J.; Frohne, M.V.; Gallagher, H.R.; Gomes, R.A.; Goodman, M.C.; Gouffon, P.; Graf, N.; Gran, R.; Grzelak, K.; Habig, A.; Hartnell, J.; Hatcher, R.; Himmel, A.; Holin, A.; Huang, X.; Hylen, J.; Irwin, G.M.; Isvan, Z.; Jaffe, D.E.; James, C.; Jensen, D.; Kafka, T.; Kasahara, S.M.S.; Koizumi, G.; Kopp, S.; Kordosky, M.; Kreymer, A.; Lang, K.; Ling, J.; Litchfield, P.J.; Loiacono, L.; Lucas, P.; Mann, W.A.; Marshak, M.L.; Mathis, M.; Mayer, N.; Mehdiyev, R.; Meier, J.R.; Messier, M.D.; Michael, D.G.; Miller, W.H.; Mishra, S.R.; Mitchell, J.; Moore, C.D.; Mualem, L.; Mufson, S.; Musser, J.; Naples, D.; Nelson, J.K.; Newman, H.B.; Nichol, R.J.; Nowak, J.A.; Oliver, W.P.; Orchanian, M.; Pahlka, R.B.; Paley, J.; Patterson, R.B.; Pawloski, G.; Phan-Budd, S.; Plunkett, R.K.; Qiu, X.; Radovic, A.; Ratchford, J.; Rebel, B.; Rosenfeld, C.; Rubin, H.A.; Sanchez, M.C.; Schneps, J.; Schreckenberger, A.; Schreiner, P.; Sharma, R.; Sousa, A.; Strait, M.; Tagg, N.; Talaga, R.L.; Thomas, J.; Thomson, M.A.; Tinti, G.; Toner, R.; Torretta, D.; Tzanakos, G.; Urheim, J.; Vahle, P.; Viren, B.; Walding, J.J.; Weber, A.; Webb, R.C.; White, C.; Whitehead, L.; Wojcicki, S.G.; Zwaska, R.
We report an improved measurement of $\overline{\nu}_μ$ disappearance over a distance of 735 km using the MINOS detectors and the Fermilab Main Injector neutrino beam in a $\overline{\nu}_μ$-enhanced configuration. From a total exposure of $2.95×10^{20}$ protons on target, of which 42% have not been previously analyzed, we make the most precise measurement of $Δ\overline{m}^2=[2.62^{+0.31}_{−0.28}(\text{stat})±0.09(/text{syst})]×10^{−3} eV^2$ and constrain the $\overline{\nu}_μ$ mixing angle $sin^2(2\bar θ)>0.75$ (90% C.L.). These values are in agreement with $Δm^2$ and $sin^2(2θ)$ measured for $\nu_μ$, removing the tension reported in [P. Adamson et al. (MINOS), Phys. Rev. Lett. 107, 021801 (2011).].
Measurements of atmospheric neutrinos and antineutrinos in the MINOS far detector
(American Physical Society, 2012) Adamson, P.; Backhouse, C.; Barr, G.; Bishai, M.; Blake, A.S.T.; Bock, G.J.; Boehnlein, D.J.; Bogert, D.; Cao, S.V.; Chapman, J.D.; Childress, S.; Coelho, J.A.B.; Corwin, L.; Cronin-Hennessy, D.; Danko, I.Z.; De Jong, J.K.; Devenish, N.E.; Diwan, M.V.; Escobar, C.O.; Evans, J.J.; Falk, E.; Feldman, G.J.; Frohne, M.V.; Gallagher, H.R.; Gomes, R.A.; Goodman, M.C.; Gouffon, P.; Graf, N.; Gran, R.; Grzelak, K.; Habig, A.; Hartnell, J.; Hatcher, R.; Himmel, A.; Holin, A.; Hylen, J.; Irwin, G.M.; Isvan, Z.; Jaffe, D.E.; James, C.; Jensen, D.; Kafka, T.; Kasahara, S.M.S.; Koizumi, G.; Kopp, S.; Kordosky, M.; Kreymer, A.; Lang, K.; Ling, J.; Litchfield, P.J.; Loiacono, L.; Lucas, P.; Mann, W.A.; Marshak, M.L.; Mathis, M.; Mayer, N.; Medeiros, M.M.; Mehdiyev, R.; Meier, J.R.; Messier, M.D.; Miller, W.H.; Mishra, S.R.; Mitchell, J.; Moore, C.D.; Mualem, L.; Mufson, S.; Musser, J.; Naples, D.; Nelson, J.K.; Newman, H.B.; Nichol, R.J.; Nowak, J.A.; Oliver, W.P.; Orchanian, M.; Pahlka, R.B.; Paley, J.; Patterson, R.B.; Pawloski, G.; Phan-Budd, S.; Plunkett, R.K.; Qiu, X.; Radovic, A.; Ratchford, J.; Rebel, B.; Rosenfeld, C.; Rubin, H.A.; Sanchez, M.C.; Schneps, J.; Schreckenberger, A.; Schreiner, P.; Sharma, R.; Sousa, A.; Speakman, B.; Strait, M.; Tagg, N.; Talaga, R.L.; Thomas, J.; Thomson, M.A.; Toner, R.; Torretta, D.; Tzanakos, G.; Urheim, J.; Vahle, P.; Viren, B.; Walding, J.J.; Weber, A.; Webb, R.C.; White, C.; Whitehead, L.; Wojcicki, S.G.; Zhang, K.; Zwaska, R.
This paper reports measurements of atmospheric neutrino and antineutrino interactions in the MINOS Far Detector, based on 2553 live-days (37.9 kton-years) of data. A total of 2072 candidate events are observed. These are separated into 905 contained-vertex muons and 466 neutrino-induced rock-muons, both produced by charged-current $ν_μ$ and $\overline{ν}_μ$ interactions, and 701 contained-vertex showers, composed mainly of charged-current $ν_e$ and $\overline{ν}_e$ interactions and neutral-current interactions. The curvature of muon tracks in the magnetic field of the MINOS Far Detector is used to select separate samples of $ν_μ$ and $\overline{ν}_μ$ events. The observed ratio of $\overline{ν}_μ$ to $ν_μ$ events is compared with the Monte Carlo (MC) simulation, giving a double ratio of $R^{data}_{\bar ν/ν}/R^{MC}_{\bar ν/ν}=1.03±0.08(\text{stat})±0.08(\text{syst})$. The $ν_μ$ and $\overline{ν}_μ$ data are separated into bins of L/E resolution, based on the reconstructed energy and direction of each event, and a maximum likelihood fit to the observed $L/E$ distributions is used to determine the atmospheric neutrino oscillation parameters. This fit returns 90% confidence limits of $|Δm^2|=(1.9±0.4)×10^{−3} \text{eV}^2$ and $\text{sin}^2 2θ>0.86$. The fit is extended to incorporate separate $ν_μ$ and $\overline{ν}_μ$ oscillation parameters, returning 90% confidence limits of $|Δm^2|−|Δ\overline{m}^2|=0.6^{+2.4}_{−0.8}×10^{−3} \text{eV}^2$ on the difference between the squared-mass splittings for neutrinos and antineutrinos.
Search for Lorentz invariance and CPT violation with muon antineutrinos in the MINOS Near Detector
(American Physical Society, 2012) Adamson, P.; Ayres, D.S.; Barr, G.; Bishai, M.; Blake, A.; Bock, G.J.; Boehnlein, D.J.; Bogert, D.; Cao, S.V.; Cavanaugh, S.; Childress, S.; Coelho, J.A.B.; Corwin, L.; Cronin-Hennessy, D.; Danko, I.Z.; De Jong, J.K.; Devenish, N.E.; Diwan, M.V.; Escobar, C.O.; Evans, J.J.; Falk, E.; Feldman, G.J.; Frohne, M.V.; Gallagher, H.R.; Gomes, R.A.; Goodman, M.C.; Gouffon, P.; Graf, N.; Gran, R.; Grzelak, K.; Habig, A.; Hartnell, J.; Hatcher, R.; Himmel, A.; Holin, A.; Hylen, J.; Irwin, G.M.; Isvan, Z.; James, C.; Jensen, D.; Kafka, T.; Kasahara, S.M.S.; Koizumi, G.; Kopp, S.; Kordosky, M.; Kreymer, A.; Lang, K.; Ling, J.; Litchfield, P.J.; Loiacono, L.; Lucas, P.; Mann, W.A.; Marshak, M.L.; Mathis, M.; Mayer, N.; Mehdiyev, R.; Meier, J.R.; Messier, M.D.; Miller, W.H.; Mishra, S.R.; Mitchell, J.; Moore, C.D.; Mualem, L.; Mufson, S.; Musser, J.; Naples, D.; Nelson, J.K.; Newman, H.B.; Nichol, R.J.; Nowak, J.A.; Oliver, W.P.; Orchanian, M.; Pahlka, R.B.; Paley, J.; Patterson, R.B.; Pawloski, G.; Phan-Budd, S.; Plunkett, R.K.; Qiu, X.; Radovic, A.; Ratchford, J.; Rebel, B.; Rosenfeld, C.; Rubin, H.A.; Sanchez, M.C.; Schneps, J.; Schreckenberger, A.; Schreiner, P.; Sharma, R.; Sousa, A.; Strait, M.; Tagg, N.; Talaga, R.L.; Thomas, J.; Thomson, M.A.; Tinti, G.; Toner, R.; Torretta, D.; Tzanakos, G.; Urheim, J.; Vahle, P.; Viren, B.; Walding, J.J.; Weber, A.; Webb, R.C.; White, C.; Whitehead, L.; Wojcicki, S.G.; Zwaska, R.
We have searched for sidereal variations in the rate of antineutrino interactions in the MINOS Near Detector. Using antineutrinos produced by the NuMI beam, we find no statistically significant sidereal modulation in the rate. When this result is placed in the context of the Standard Model Extension theory we are able to place upper limits on the coefficients defining the theory. These limits are used in combination with the results from an earlier analysis of MINOS neutrino data to further constrain the coefficients.