Professor Dr.rer.nat. Dipl.Phys. Alfons Weber FInstP, MA Ox: Publications

Search for muon-Neutrino to electron-Neutrino transitions in MINOS

Physical Review Letters 103:26 (2009)

Authors:

P Adamson, C Andreopoulos, KE Arms, R Armstrong, DJ Auty, DS Ayres, C Backhouse, PD Barnes, G Barr, WL Barrett, BR Becker, A Belias, RH Bernstein, M Betancourt, D Bhattacharya, M Bishai, A Blake, GJ Bock, J Boehm, DJ Boehnlein, D Bogert, C Bower, S Cavanaugh, JD Chapman, D Cherdack, S Childress, BC Choudhary, JH Cobb, JAB Coelho, SJ Coleman, D Cronin-Hennessy, AJ Culling, IZ Danko, JK De Jong, NE Devenish, MV Diwan, M Dorman, AR Erwin, CO Escobar, JJ Evans, E Falk, GJ Feldman, MV Frohne, HR Gallagher, A Godley, MC Goodman, P Gouffon, R Gran, EW Grashorn, K Grzelak, A Habig, D Harris, PG Harris, J Hartnell, R Hatcher, K Heller, A Himmel, A Holin, C Howcroft, X Huang, J Hylen, GM Irwin, Z Isvan, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, DJ Koskinen, Z Krahn, A Kreymer, K Lang, J Ling, PJ Litchfield, RP Litchfield, L Loiacono, P Lucas, J Ma, WA Mann, ML Marshak, JS Marshall, N Mayer, AM McGowan, R Mehdiyev, JR Meier, MD Messier, CJ Metelko, DG Michael, WH Miller, SR Mishra, J Mitchell, CD Moore, J Morfín, L Mualem, S Mufson, J Musser, D Naples

Abstract:

This Letter reports on a search for νμ→νe transitions by the MINOS experiment based on a 3.14×1020 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 νμ→νe oscillations, this 1.5σ excess of events is consistent with sin 2(2θ13) comparable to the CHOOZ limit when |Δm2|=2.43×10-3eV2 and sin 2(2θ23)=1.0 are assumed. © 2009 The American Physical Society.

Recent results from the minos experiment

Frascati Physics Series 47:SPEC. ISS. (2008) 133-140

Abstract:

MINOS is a long baseline neutrino oscillation experiment. Protons from the Fermilab main injector are used to generate an intense muon neutrino beam, which is directed at the Soudan underground laboratory in Northern Minnesota. The result from two years of running with a total exposure of 2.5 × 10 20 protons on target from the NuMI beam is reported. We made a preliminary measurement by comparing the event rate and energy spectra of charge current muon neutrino interactions in the two detectors, which are 1 and 735 km from the neutrino production target. The data is consistent with νμ to ντ oscillation in the so-called atmospheric parameter range with Δm2 = (2.38+0.20-0.16) * 10-3eV2 and sin2 2θ = 1-0.08. Copyright © 2008, by INFN.

Search for active neutrino disappearance using neutral-current interactions in the MINOS long-baseline experiment

Physical Review Letters 101:22 (2008)

Authors:

P Adamson, C Andreopoulos, KE Arms, R Armstrong, DJ Auty, DS Ayres, C Backhouse, B Baller, G Barr, WL Barrett, BR Becker, A Belias, RH Bernstein, D Bhattacharya, M Bishai, A Blake, GJ Bock, J Boehm, DJ Boehnlein, D Bogert, C Bower, E Buckley-Geer, S Cavanaugh, JD Chapman, D Cherdack, S Childress, BC Choudhary, JH Cobb, SJ Coleman, AJ Culling, JK De Jong, M Dierckxsens, MV Diwan, M Dorman, SA Dytman, CO Escobar, JJ Evans, E Falk Harris, GJ Feldman, MV Frohne, HR Gallagher, A Godley, MC Goodman, P Gouffon, R Gran, EW Grashorn, N Grossman, K Grzelak, A Habig, D Harris, PG Harris, J Hartnell, R Hatcher, K Heller, A Himmel, A Holin, L Hsu, J Hylen, GM Irwin, M Ishitsuka, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, JJ Kim, MS Kim, G Koizumi, S Kopp, M Kordosky, DJ Koskinen, SK Kotelnikov, A Kreymer, S Kumaratunga, K Lang, J Ling, PJ Litchfield, RP Litchfield, L Loiacono, P Lucas, J Ma, WA Mann, A Marchionni, ML Marshak, JS Marshall, N Mayer, AM McGowan, JR Meier, MD Messier, CJ Metelko, DG Michael, WH Miller, SR Mishra, CD Moore, J Morfín, L Mualem, S Mufson, S Murgia, J Musser, D Naples

Abstract:

We report the first detailed comparisons of the rates and spectra of neutral-current neutrino interactions at two widely separated locations. A depletion in the rate at the far site would indicate mixing between νμ and a sterile particle. No anomalous depletion in the reconstructed energy spectrum is observed. Assuming oscillations occur at a single mass-squared splitting, a fit to the neutral- and charged-current energy spectra limits the fraction of νμ oscillating to a sterile neutrino to be below 0.68 at 90% confidence level. A less stringent limit due to a possible contribution to the measured neutral-current event rate at the far site from νe appearance at the current experimental limit is also presented. © 2008 The American Physical Society.

The magnetized steel and scintillator calorimeters of the MINOS experiment

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 596:2 (2008) 190-228

Authors:

DG Michael, P Adamson, T Alexopoulos, WWM Allison, GJ Alner, K Anderson, C Andreopoulos, M Andrews, R Andrews, C Arroyo, S Avvakumov, DS Ayres, B Baller, B Barish, MA Barker, PD Barnes, G Barr, WL Barrett, E Beall, K Bechtol, BR Becker, A Belias, T Bergfeld, RH Bernstein, D Bhattacharya, M Bishai, A Blake, V Bocean, B Bock, GJ Bock, J Boehm, DJ Boehnlein, D Bogert, PM Border, C Bower, S Boyd, E Buckley-Geer, A Byon-Wagner, A Cabrera, JD Chapman, TR Chase, SK Chernichenko, S Childress, BC Choudhary, JH Cobb, SJ Coleman, JD Cossairt, H Courant, DA Crane, AJ Culling, D Damiani, JW Dawson, JK de Jong, DM DeMuth, A De Santo, M Dierckxsens, MV Diwan, M Dorman, G Drake, R Ducar, T Durkin, AR Erwin, CO Escobar, JJ Evans, OD Fackler, E Falk Harris, GJ Feldman, N Felt, TH Fields, R Ford, MV Frohne, HR Gallagher, M Gebhard, A Godley, J Gogos, MC Goodman, Y Gornushkin, P Gouffon, EW Grashorn, N Grossman, JJ Grudzinski, K Grzelak, V Guarino, A Habig, R Halsall, J Hanson, D Harris, PG Harris, J Hartnell, EP Hartouni, R Hatcher, K Heller, N Hill, Y Ho, C Howcroft, J Hylen, M Ignatenko, D Indurthy, GM Irwin, C James

Abstract:

The Main Injector Neutrino Oscillation Search (MINOS) experiment uses an accelerator-produced neutrino beam to perform precision measurements of the neutrino oscillation parameters in the "atmospheric neutrino" sector associated with muon neutrino disappearance. This long-baseline experiment measures neutrino interactions in Fermilab's NuMI neutrino beam with a near detector at Fermilab and again 735 km downstream with a far detector in the Soudan Underground Laboratory in northern Minnesota. The two detectors are magnetized steel-scintillator tracking calorimeters. They are designed to be as similar as possible in order to ensure that differences in detector response have minimal impact on the comparisons of event rates, energy spectra and topologies that are essential to MINOS measurements of oscillation parameters. The design, construction, calibration and performance of the far and near detectors are described in this paper. © 2008 Elsevier B.V.

Testing Lorentz invariance and CPT conservation with NuMI neutrinos in the MINOS near detector.

Phys Rev Lett 101:15 (2008) 151601

Authors:

P Adamson, C Andreopoulos, KE Arms, R Armstrong, DJ Auty, DS Ayres, B Baller, G Barr, WL Barrett, BR Becker, A Belias, RH Bernstein, D Bhattacharya, M Bishai, A Blake, GJ Bock, J Boehm, DJ Boehnlein, D Bogert, C Bower, E Buckley-Geer, S Cavanaugh, JD Chapman, D Cherdack, S Childress, BC Choudhary, SJ Coleman, AJ Culling, JK de Jong, MV Diwan, M Dorman, SA Dytman, CO Escobar, JJ Evans, E Falk Harris, GJ Feldman, MV Frohne, HR Gallagher, MC Goodman, P Gouffon, R Gran, EW Grashorn, N Grossman, K Grzelak, A Habig, D Harris, PG Harris, J Hartnell, R Hatcher, K Heller, A Himmel, A Holin, J Hylen, GM Irwin, M Ishitsuka, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, JJ Kim, G Koizumi, S Kopp, M Kordosky, DJ Koskinen, A Kreymer, S Kumaratunga, K Lang, J Ling, PJ Litchfield, RP Litchfield, L Loiacono, P Lucas, J Ma, WA Mann, ML Marshak, JS Marshall, N Mayer, AM McGowan, JR Meier, MD Messier, CJ Metelko, DG Michael, JL Miller, WH Miller, SR Mishra, CD Moore, J Morfín, L Mualem, S Mufson, S Murgia, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, TC Nicholls, JP Ochoa-Ricoux, WP Oliver, R Ospanov, J Paley, V Paolone, A Para, T Patzak, Z Pavlović, G Pawloski, GF Pearce, CW Peck, DA Petyt, R Pittam, RK Plunkett, A Rahaman, RA Rameika, TM Raufer, B Rebel, J Reichenbacher, PA Rodrigues, C Rosenfeld, HA Rubin, MC Sanchez, N Saoulidou, J Schneps, P Schreiner, P Shanahan, W Smart, A Sousa, B Speakman, P Stamoulis, M Strait, N Tagg, RL Talaga, MA Tavera, J Thomas, J Thompson, MA Thomson, JL Thron, G Tinti, G Tzanakos, J Urheim, P Vahle, B Viren, M Watabe, A Weber, RC Webb, A Wehmann, N West, C White, SG Wojcicki, T Yang, M Zois, K Zhang, R Zwaska, MINOS Collaboration

Abstract:

A search for a sidereal modulation in the MINOS near detector neutrino data was performed. If present, this signature could be a consequence of Lorentz and CPT violation as predicted by the effective field theory called the standard-model extension. No evidence for a sidereal signal in the data set was found, implying that there is no significant change in neutrino propagation that depends on the direction of the neutrino beam in a sun-centered inertial frame. Upper limits on the magnitudes of the Lorentz and CPT violating terms in the standard-model extension lie between 10(-4) and 10(-2) of the maximum expected, assuming a suppression of these signatures by a factor of 10(-17).

51��