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Search for Muon Neutrino Disappearance in a Short-Baseline Accelerator Neutrino Beam  [PDF]
Yasuhiro Nakajima,for the SciBooNE Collaboration
Physics , 2010,
Abstract: We report a search for muon neutrino disappearance in the $\Delta m^{2}$ region of 0.5-40 $eV^2$ using data from both SciBooNE and MiniBooNE experiments. SciBooNE data provides a constraint on the neutrino flux, so that the sensitivity to $\nu_{\mu}$ disappearance with both detectors is better than with just MiniBooNE alone. The preliminary sensitivity for a joint $\nu_\mu$ disappearance search is presented.
An Appraisal of Muon Neutrino Disappearance at Short Baseline  [PDF]
L. Stanco,S. Dusini,A. Longhin,A. Bertolin,M. Laveder
Advances in High Energy Physics , 2013, DOI: 10.1155/2013/948626
Abstract: Neutrino physics is nowadays receiving more and more attention as a possible source of information for the long-standing problem of new physics beyond the Standard Model. The recent measurement of the third mixing angle in the standard mixing oscillation scenario encourages us to pursue the still missing results on leptonic CP violation and absolute neutrino masses. However, several puzzling measurements exist which deserve an exhaustive evaluation. We will illustrate the present status of the muon disappearance measurements at small and the current CERN project to revitalize the neutrino field in Europe with emphasis on the search for sterile neutrinos. We will then illustrate the achievements that a double muon spectrometer can make with regard to discovery of new neutrino states, using a newly developed analysis. 1. Introduction The unfolding of the physics of the neutrino is a long and exciting story spanning the last 80 years. Over this time the interchange of theoretical hypotheses and experimental facts has been one of the most fruitful demonstrations of the progress of knowledge in physics. The work of the last decade and a half finally brought a coherent picture within the Standard Model (SM) (or some small extensions of it), namely, the mixing of three neutrino flavour states with three , , and mass eigenstates. The last unknown mixing angle, , was recently measured [1–4], but still many questions remain unanswered to completely settle the scenario: the absolute masses, the Majorana/Dirac nature, and the existence and magnitude of leptonic CP violation. Answers to these questions will beautifully complete the (standard) three-neutrino model, but they will hardly provide an insight into new physics Beyond the Standard Model (BSM). Many relevant questions will stay open: the reason for neutrinos, the relation between the leptonic and hadronic sectors of the SM, the origin of Dark Matter, and overall where and how to look for BSM physics. Neutrinos may be an excellent source of BSM physics and their story is supporting that at length. There are actually several experimental hints for deviations from the “coherent” picture described above. Many unexpected results, not statistically significant on a single basis, appeared also in the last decade and a half, bringing attention to the hypothesis of sterile neutrinos [5]. A recent White Paper [6] contains a comprehensive review of these issues. In this paper we will focus on one of the most intriguing and long-standing unresolved result: the unexpected oscillation of neutrinos at relatively small
Observation of muon neutrino disappearance with the MINOS detectors and the NuMI neutrino beam  [PDF]
MINOS Collaboration
Physics , 2006, DOI: 10.1103/PhysRevLett.97.191801
Abstract: This letter reports results from the MINOS experiment based on its initial exposure to neutrinos from the Fermilab NuMI beam. The rate and energy spectra of charged current muon neutrino interactions are compared in two detectors located along the beam axis at distances of 1 km and 735 km. With 1.27 x 10^{20} 120 GeV protons incident on the NuMI target, 215 events with energies below 30 GeV are observed at the Far Detector, compared to an expectation of 336 \pm 14.4 events. The data are consistent with muon neutrino disappearance via oscillation with |\Delta m^2_{23}| = 2.74^{+0.44}_{-0.26} x 10^{-3} eV^2/c^4 and sin^2(2\theta_{23}) > 0.87 (at 60% C.L.).
First muon anti-neutrino disappearance oscillation results from T2K  [PDF]
Blair Jamieson
Physics , 2015,
Abstract: This talk presented the first muon anti-neutrino disappearance analysis using data from the T2K anti-neutrino data taken in 2014 and up to March 12, 2015. The preliminary measured oscillation parameters, using $2.3\times 10^{20}$ protons on target, are $\Delta \bar{\rm{m}}_{32}^{2} = 2.33_{-0.23}^{+0.27} \times 10^{-3}~$eV$^{2}$, and sin$^{2} \bar{\theta}_{23} = 0.515_{-0.095}^{+0.085}$. These oscillation parameters are consistent with the neutrino mode, and with the measurements of the MINOS experiment.
Search for the disappearance of muon antineutrinos in the NuMI neutrino beam  [PDF]
MINOS Collaboration,P. Adamson,D. J. Auty,D. S. Ayres,C. Backhouse,G. Barr,M. Bishai,A. Blake,G. J. Bock,D. J. Boehnlein,D. Bogert,S. V. Cao,S. Cavanaugh,D. Cherdack,S. Childress,B. C. Choudhary,J. A. B. Coelho,S. J. Coleman,L. Corwin,D. Cronin-Hennessy,I. Z. Danko,J. K. de Jong,N. E. Devenish,M. V. Diwan,M. Dorman,C. O. Escobar,J. J. Evans,E. Falk,G. J. Feldman,M. V. Frohne,H. R. Gallagher,R. A. Gomes,M. C. Goodman,P. Gouffon,N. Graf,R. Gran,N. Grant,K. Grzelak,A. Habig,J. Hartnell,R. Hatcher,A. Himmel,A. Holin,C. Howcroft,X. Huang,J. Hylen,G. M. Irwin,Z. Isvan,D. E. Jaffe,C. James,D. Jensen,T. Kafka,S. M. S. Kasahara,G. Koizumi,S. Kopp,M. Kordosky,A. Kreymer,K. Lang,G. Lefeuvre,J. Ling,P. J. Litchfield,L. Loiacono,P. Lucas,W. A. Mann,M. L. Marshak,M. Mathis,N. Mayer,R. Mehdiyev,J. R. Meier,M. D. Messier,D. G. Michael,W. H. Miller,S. R. Mishra,J. Mitchell,C. D. Moore,L. Mualem,S. Mufson,J. Musser,D. Naples,J. K. Nelson,H. B. Newman,R. J. Nichol,J. A. Nowak,J. P. Ochoa-Ricoux,W. P. Oliver,M. Orchanian,R. Pahlka,J. Paley,R. B. Patterson,G. Pawloski,G. F. Pearce,S. Phan-Budd,R. K. Plunkett,X. Qiu,J. Ratchford,B. Rebel,C. Rosenfeld,H. A. Rubin,M. C. Sanchez,J. Schneps,A. Schreckenberger,P. Schreiner,R. Sharma,A. Sousa,M. Strait,N. Tagg,R. L. Talaga,M. A. Tavera,J. Thomas,M. A. Thomson,G. Tinti,R. Toner,D. Torretta,G. Tzanakos,J. Urheim,P. Vahle,B. Viren,J. J. Walding,A. Weber,R. C. Webb,C. White,L. Whitehead,S. G. Wojcicki,T. Yang,R. Zwaska
Statistics , 2011, DOI: 10.1103/PhysRevD.84.071103
Abstract: We report constraints on antineutrino oscillation parameters that were obtained by using the two MINOS detectors to measure the 7% muon antineutrino component of the NuMI neutrino beam. In the Far Detector, we select 130 events in the charged-current muon antineutrino sample, compared to a prediction of 136.4 +/- 11.7(stat) ^{+10.2}_{-8.9}(syst) events under the assumption |dm2bar|=2.32x10^-3 eV^2, snthetabar=1.0. Assuming no oscillations occur at the Near Detector baseline, a fit to the two-flavor oscillation approximation constrains |dm2bar|<3.37x10^-3 eV^2 at the 90% confidence level with snthetabar=1.0.
A Study of Muon Neutrino Disappearance Using the Fermilab Main Injector Neutrino Beam  [PDF]
Michael Kordosky,David Petyt,for the MINOS Collaboration
Physics , 2007, DOI: 10.1103/PhysRevD.77.072002
Abstract: We report the results of a search for muon-neutrino disappearance by the Main Injector Neutrino Oscillation Search. The experiment uses two detectors separated by 734 km to observe a beam of neutrinos created by the Neutrinos at the Main Injector facility at Fermi National Accelerator Laboratory. The data were collected in the first 282 days of beam operations and correspond to an exposure of 1.27e20 protons on target. Based on measurements in the Near Detector, in the absence of neutrino oscillations we expected 336 +/- 14 muon-neutrino charged-current interactions at the Far Detector but observed 215. This deficit of events corresponds to a significance of 5.2 standard deviations. The deficit is energy dependent and is consistent with two-flavor neutrino oscillations according to delta m-squared = 2.74e-3 +0.44/-0.26e-3 eV^2 and sin^2(2 theta) > 0.87 at 68% confidence level.
Evidence for muon neutrino oscillation in an accelerator-based experiment  [PDF]
K2K Collaboration,E. Aliu
Physics , 2004, DOI: 10.1103/PhysRevLett.94.081802
Abstract: We present results for muon neutrino oscillation in the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment. K2K uses an accelerator-produced muon neutrino beam with a mean energy of 1.3 GeV directed at the Super-Kamiokande detector. We observed the energy dependent disappearance of muon neutrino, which we presume have oscillated to tau neutrino. The probability that we would observe these results if there is no neutrino oscillation is 0.0050% (4.0 sigma).
First direct observation of muon antineutrino disappearance  [PDF]
MINOS collaboration,P. Adamson,C. Andreopoulos,D. J. Auty,D. S. Ayres,C. Backhouse,G. Barr,M. Bishai,A. Blake,G. J. Bock,D. J. Boehnlein,D. Bogert,S. Cavanaugh,D. Cherdack,S. Childress,B. C. Choudhary,J. A. B. Coelho,S. J. Coleman,L. Corwin,D. Cronin-Hennessy,I. Z. Danko,J. K. de Jong,N. E. Devenish,M. V. Diwan,M. Dorman,C. O. Escobar,J. J. Evans,E. Falk,G. J. Feldman,M. V. Frohne,H. R. Gallagher,R. A. Gomes,M. C. Goodman,P. Gouffon,N. Graf,R. Gran,N. Grant,K. Grzelak,A. Habig,D. Harris,J. Hartnell,R. Hatcher,A. Himmel,A. Holin,C. Howcroft,X. Huang,J. Hylen,J. Ilic,G. M. Irwin,Z. Isvan,D. E. Jaffe,C. James,D. Jensen,T. Kafka,S. M. S. Kasahara,G. Koizumi,S. Kopp,M. Kordosky,A. Kreymer,K. Lang,G. Lefeuvre,J. Ling,P. J. Litchfield,L. Loiacono,P. Lucas,W. A. Mann,M. L. Marshak,N. Mayer,A. M. McGowan,R. Mehdiyev,J. R. Meier,M. D. Messier,W. H. Miller,S. R. Mishra,J. Mitchell,C. D. Moore,J. Morfín,L. Mualem,S. Mufson,J. Musser,D. Naples,J. K. Nelson,H. B. Newman,R. J. Nichol,T. C. Nicholls,J. A. Nowak,J. P. Ochoa-Ricoux,W. P. Oliver,M. Orchanian,R. Ospanov,J. Paley,R. B. Patterson,G. Pawloski,G. F. Pearce,D. A. Petyt,S. Phan-Budd,R. K. Plunkett,X. Qiu,J. Ratchford,T. M. Raufer,B. Rebel,P. A. Rodrigues,C. Rosenfeld,H. A. Rubin,M. C. Sanchez,J. Schneps,P. Schreiner,P. Shanahan,A. Sousa,P. Stamoulis,M. Strait,N. Tagg,R. L. Talaga,E. Tetteh-Lartey,J. Thomas,M. A. Thomson,G. Tinti,R. Toner,G. Tzanakos,J. Urheim,P. Vahle,B. Viren,A. Weber,R. C. Webb,C. White,L. Whitehead,S. G. Wojcicki
Statistics , 2011, DOI: 10.1103/PhysRevLett.107.021801
Abstract: This letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for muon antineutrino production, accumulating an exposure of $1.71\times 10^{20}$ protons on target. In the Far Detector, 97 charged current muon antineutrino events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at $6.3\sigma$. The best fit to oscillation yields $\Delta \bar{m}^{2}=(3.36^{+0.46}_{-0.40}\textrm{(stat.)}\pm0.06\textrm{(syst.)})\times 10^{-3}\,\eV^{2}$, $\sin^{2}(2\bar{\theta})=0.86^{+0.11}_{-0.12}\textrm{(stat.)}\pm0.01\textrm{(syst.)}$. The MINOS muon neutrino and muon antineutrino measurements are consistent at the 2.0% confidence level, assuming identical underlying oscillation parameters.
KPipe: a decisive test for muon neutrino disappearance  [PDF]
Spencer N. Axani,Gabriel Collin,Janet M. Conrad,Mike H. Shaevitz,Josh Spitz,Taritree Wongjirad
Physics , 2015,
Abstract: The short baseline neutrino oscillation experiment, KPipe, is designed to perform a sensitive search for muon neutrino disappearance in the current global fit allowed regions for sterile neutrinos. KPipe is to be located at the Material Life Science Experimental Facility at J-PARC: the world's most intense source of 236~MeV, monoenergetic muon neutrinos. By measuring the $\nu_\mu$ charged current interaction rate along a 120~m long, 3~m diameter detector, KPipe can map out short baseline oscillations over an L/E of 0.14 to 0.64~m/MeV. Using a long, single detector to measure the $\nu_\mu$ interaction rate as a function of distance largely eliminates the systematic uncertainties associated with cross sections and fluxes. In this paper, we show that KPipe can cover the current global best fit to 5$\sigma$ after 3 years of running.
Search for Sterile Neutrinos in the Muon Neutrino Disappearance Mode at FNAL  [PDF]
A. Anokhina,A. Bagulya,M. Benettoni,P. Bernardini,R. Brugnera,M. Calabrese,A. Cecchetti,S. Cecchini,M. Chernyavskiy,F. Dal Corso,O. Dalkarov,A. Del Prete,G. De Robertis,M. De Serio,D. Di Ferdinando,S. Dusini,T. Dzhatdoev,R. A. Fini,G. Fiore,A. Garfagnini,M. Guerzoni,B. Klicek,U. Kose,K. Jakovcic,G. Laurenti,I. Lippi,F. Loddo,A. Longhin,M. Malenica,G. Mancarella,G. Mandrioli,A. Margiotta,G. Marsell,N. Mauri,E. Medinaceli,R. Mingazheva,O. Morgunova,M. T. Muciaccia,M. Nessi,D. Orecchini,A. Paoloni,G. Papadia,L. Paparella,L. Pasqualini,A. Pastore,L. Patrizii,N. Polukhina,M. Pozzato,M. Roda,T. Roganova,G. Rosa,Z. Sahnoun,T. Shchedrina,S. Simone,C. Sirignano,G. Sirri,M. Spurio,L. Stanco,N. Starkov,M. Stipcevic,A. Surdo,M. Tenti,V. Togo,M. Vladymyrov
Physics , 2015,
Abstract: The NESSiE Collaboration has been setup to undertake a conclusive experiment to clarify the {\em muon--neutrino disappearance} measurements at short baselines in order to put severe constraints to models with more than the three--standard neutrinos, or even to robustly establish the presence of a new kind of neutrino oscillation for the first time. To this aim the current FNAL--Booster neutrino beam for a Short--Baseline experiment was carefully evaluated by considering the use of magnetic spectrometers at two sites, near and far ones. The detector locations were studied, together with the achievable performances of two OPERA--like spectrometers. The study was constrained by the availability of existing hardware and a time--schedule compatible with the undergoing project of multi--site Liquid--Argon detectors at FNAL. The settled physics case and the kind of proposed experiment on the Booster neutrino beam would definitively clarify the existing tension between the $\numu$ disappearance and the $\nue$ appearance/disappearance at the eV mass scale. In the context of neutrino oscillations the measurement of $\numu$ disappearance is a robust and fast approach to either reject or discover new neutrino states at the eV mass scale. We discuss an experimental program able to extend by more than one order of magnitude (for neutrino disappearance) and by almost one order of magnitude (for antineutrino disappearance) the present range of sensitivity for the mixing angle between standard and sterile neutrinos. These extensions are larger than those achieved in any other proposal presented so far.
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