| MINOS |
| A Study of Muon Neutrino Disappearance Using the Fermilab Main Injector Neutrino Beam |
|
| (5 November 2007) |
| MINOS |
| Observation of muon neutrino disappearance with the MINOS detectors and the NuMI neutrino beam |
| (29 July 2006) |
| Super-Kamiokande |
| A Measurement of Atmospheric Neutrino Flux Consistent with Tau Neutrino Appearance |
| (25 July 2006) |
| Updated MINOS Oscillation Results |
| (17 June 2006) |
| First MINOS Oscillation Results |
| (30 March 2006) |
First Observations of Separated Atmospheric
and
Events in the MINOS Detector
|
| (15 December 2005) |
| Evidence for muon neutrino oscillation in an accelerator-based experiment |
| (11 November 2004) |
107 observed
events
|
expected events without oscillations
|
probability of a statistical fluctuation (no oscillations)
|
probability of a statistical fluctuation (no oscillations) of rate
|
probability of a statistical fluctuation (no oscillations) of spectrum
|
best-fit:
|
| Recent Results From K2K |
| (11 June 2004) |
| see also: T. Nakaya, K2K results, Neutrino 2004 |
108 observed
events
|
expected events without oscillations
|
probability of a statistical fluctuation about
|
| the observed spectrum reveals the type of distortion expected from oscillations |
| Evidence for an oscillatory signature in atmospheric neutrino oscillation |
| Super-Kamiokande Collaboration |
| (28 April 2004) |
| T. Kajita, WIN2003 |
| (October 2003) |
|
|
oscillation channel is favored [M.
Shiozawa,
Neutrino 2002].
Atmospheric Neutrino Experiments.
Review of Particle Physics:
Cosmic Rays
The FLUKA 3-D Atmospheric Neutrino Flux,
tables of calculated fluxes (see
hep-ph/9907408)
Evidence for Neutrino Mass from Observations of Atmospheric Neutrinos with Super-Kamiokande
Ph.D.
Thesis by Mark D.
Messier
Atmospheric neutrino oscillation analysis using FLUKA 3D flux and Super-Kamiokande data,
Atsuko Kibayashi,
PhD Thesis,
University of Hawaii,
August 2002
APS Neutrino Study: Solar and Atmospheric Neutrino Experiments Working Group
Nuance Neutrino Generator
L/E analysis of the atmospheric neutrino data from Super-Kamiokande,
Masaki Ishitsuka,
PhD Thesis,
University of Tokyo,
Feb.
2004
Atmosphere
Physics of Atmospheres and Oceans
1 - Books
2 - Reviews - Experiment
3 - Reviews - Experiment - Conference Proceedings
4 - Reviews - Phenomenology
5 - Reviews - Phenomenology - Conference Proceedings
6 - PhD Theses
7 - Experiment
8 - Experiment - Conference Proceedings
9 - Experiment - Neutrino Oscillations
10 - Experiment - Neutrino Oscillations - Conference Proceedings
11 - Experiment - Neutrino Oscillations - Slides
12 - Experiment - Muons
13 - Experiment - Muons - Conference Proceedings
14 - Experiment - Gamma Rays
15 - Neutrino Flux
16 - Neutrino Flux - Conference Proceedings
17 - Production Cross Sections
18 - Production Cross Sections - Conference Proceedings
19 - Detection Cross Sections
20 - Detection Cross Sections - Conference Proceedings
21 - Detector
22 - Phenomenology
23 - Phenomenology - Conference Proceedings
24 - Phenomenology - Muons
25 - Phenomenology - Muons - Conference Proceedings
26 - Phenomenology - Models
27 - Phenomenology - Critics
28 - Phenomenology - Critics - Conference Proceedings
29 - Theory - Neutrino Oscillations
30 - Theory - Models
31 - Future Projects
32 - Future Projects - Conference Proceedings
oscillations obtained by different atmospheric neutrino experiments.
[M.L.].
C.L.
allowed contours for
oscillations obtained by different atmospheric neutrino experiments.
The
figure
in slide n.24 shows the
C.L.
allowed contour for
oscillations obtained by Super-Kamiokande.
[M.L.].
sensitivity on
of different projects.
[M.L.].
and
but not
;
namely,
there is a deficit of
,
whereas the measured flux of electron neutrinos is consistent with the calculation.
,
disfavor the hypothesis of no tau neutrino appearance by 2.4 sigma.
...
The ratio of
to
events in the data is compared to the Monte Carlo expectation assuming neutrinos and anti-neutrinos oscillate in same manner giving:
...
Although the statistics are limited,
this is the first direct observation of atmospheric neutrino interactions separately for
and
.
over neutrino energy
was studied.
distribution was observed in the data,
as predicted from the sinusoidal flavor transition probability of neutrino oscillation.
distribution constrained
neutrino oscillation parameters;
and
at 90% confidence level.
ratio in Kamiokande,
Hirata, K. S. et al.
(Kamiokande),
Phys. Lett. B280 (1992) 146-152.
and K2K,
Itow, Y., 2003.
2nd International conference on Flavor Physics,
ICFP 2003,
6-11 October 2003,
Korea Institute for Advanced Study (KIAS).
http://newton.kias.re.kr/~hepph/public_html/03icfp/talk/itow1.pdf.
channel as compared with the CHOOZ limit and the Super-Kamiokande allowed region.
[M.L.].
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....
Based on measurements in the Near Detector,
in the absence of neutrino oscillations we expected
charged-current interactions at the Far Detector but observed 215.
This deficit of events corresponds to a significanc e of 5.2 standard deviations.
The deficit is energy dependent and is consistent with two-flavor neutrino oscillations according to
and
at 68% confidence level.
and
(68% C.L.).
oscillation in a long-baseline accelerator experiment,
S. Yamamoto et al.
(K2K),
Phys. Rev. Lett. 96 (2006) 181801,
arXiv:hep-ex/0603004.
,
the best fit value of the K2K
disappearance analysis,
we set an upper limit of
at 90% confidence level.
flux together with a distortion of the energy spectrum.
Fifty-six beam neutrino events are observed in Super-Kamiokande (SK),
250 km from the neutrino production point,
with an expectation of
.
,
....
The measured oscillation parameters are consistent with the ones suggested by atmospheric neutrinos.
At the time of this letter the K2K experiment has collected approximately one-half of its planned
protons on target.
oscillations,
Fei-Fan Lee, Guey-Lin Lin,
Astropart. Phys. 25 (2006) 64,
arXiv:hep-ph/0412383.
below 10 GeV....
The uncertainty of the absolute normalization of the atmospheric neutrino is still large above 10 GeV due to the uncertainty of the primary cosmic ray flux above 100 GeV.
However,
the zenith angle variation is not affected by these uncertainties.
solid angle.
Results are given for Kamioka,
which is at low geomagnetic latitude,
and for SNO and Soudan at high latitude.
~GeV,
with approximately a 3% excess in the 3D calculation for sub-GeV neutrinos.
The differences are much more noticeable in the zenith angle distributions for
~GeV,
which show a significant excess in the 3D calculation for
and a smaller deficit for
.
The differences largely cancel in the angular integral,
leaving the small (3%) overall difference mentioned above.
The zenith-angle differences decrease with energy and become completely negligible for
~GeV.
~MeV by 15% relative to the 1D calculation.
The corresponding reduction decreases to 4% for
~GeV.
) measured by AMS.
The results of our Monte Carlo study of propagation in space and interaction with the atmosphere of cosmic particle show that the primary proton flux in the vicinity of the Earth is essentially anisotropic at the directions approaching the horizontal plane.
The horizontal region is the most important for determination of the up/down asymmetry of the atmospheric neutrino fluxes and consequently the result of the present study may affect the eventual experimental measurement of the neutrino oscillation parameter
.
The atmospheric neutrinos produced in our simulation have the energy spectra,
relative fluxes and angular distributions different from those obtained in the previous atmospheric flux calculations.
,
Raj Gandhi, Pomita Ghoshal, Srubabati Goswami, S Uma Sankar,
arXiv:0905.2382, 2009.
and
,
Roa, J. E., Latimer, D. C., Ernst, D. J.,
Phys. Rev. C81 (2010) 015501,
arXiv:0904.3930.
,
Gandhi, Raj, Ghoshal, Pomita, Goswami, Srubabati, Sankar, S. Uma,
arXiv:0805.3474, 2008.
,
Escamilla, J., Latimer, D. C., Ernst, D. J.,
Phys. Rev. Lett. 103 (2009) 061804,
arXiv:0805.2924.
Survival Rates in Megaton Water Cerenkov Detectors,
Raj Gandhi et al.,
arXiv:hep-ph/0506145, 2005.
Oscillations,
Raj Gandhi et al.,
Phys. Rev. Lett. 94 (2005) 051801,
arXiv:hep-ph/0408361.
,
Neutrino Mass Hierarchy and Iron Magnetized Detectors,
Sergio Palomares-Ruiz, S.T. Petcov,
Nucl. Phys. B712 (2005) 392,
arXiv:hep-ph/0406096.
are either
or
.
give
in LSND.
Therefore,
this case is equivalent to neglect LSND.
obviously cannot fit the energy spectra of atmospheric neutrinos,
which have been omitted in the analysis.
oscillations and decoherence after the first K2K spectral data,
G.L. Fogli, E. Lisi, A. Marrone, D. Montanino,
Phys. Rev. D67 (2003) 093006,
arXiv:hep-ph/0303064.
and the sign of
with a massive magnetized detector for atmospheric neutrinos,
Tabarelli de Fatis, T.,
Eur. Phys. J. C24 (2002) 43-50,
arXiv:hep-ph/0202232.
->
oscillation solution to the atmospheric neutrino anomaly excluded by the Super-Kamiokande data?,
Foot, R.,
Phys. Lett. B496 (2000) 169-174,
arXiv:hep-ph/0007065.
interpretation of the atmospheric neutrino data and cosmological constraints,
Di Bari, Pasquale, Lipari, Paolo, Lusignoli, Maurizio,
Int. J. Mod. Phys. A15 (2000) 2289-2328,
arXiv:hep-ph/9907548.
<->
oscillations in the Super-Kamiokande atmospheric neutrino experiment,
Fogli, Gian Luigi, Lisi, E., Marrone, A., Scioscia, G.,
Phys. Rev. D60 (1999) 053006,
arXiv:hep-ph/9904248.
->
solution to the atmospheric neutrino anomaly for early universe cosmology,
Foot, R.,
Astropart. Phys. 10 (1999) 253-273,
arXiv:hep-ph/9809315.
deficit from decoherence,
Grossman, Y., Worah, M. P.,
arXiv:hep-ph/9807511, 1998.
to
ratio in a high statistics atmospheric neutrino experiment,
LoSecco, J. M.,
Phys. Rev. D59 (1999) 117302,
arXiv:hep-ph/9806318.
<->
and
<->
oscillations as solutions of the atmospheric neutrino problem,
Lipari, Paolo, Lusignoli, Maurizio,
Phys. Rev. D58 (1998) 073005,
arXiv:hep-ph/9803440.
->
oscillations with Super-Kamiokande and CHOOZ,
Foot, R., Volkas, R. R., Yasuda, O.,
Phys. Lett. B433 (1998) 82-87,
arXiv:hep-ph/9802287.
->
and
->
solutions to the atmospheric neutrino problem with Super-Kamiokande data,
Foot, R., Volkas, R. R., Yasuda, O.,
Phys. Rev. D58 (1998) 013006,
arXiv:hep-ph/9801431.
->
oscillations of atmospheric neutrinos,
Liu, Q. Y., Smirnov, A. Yu.,
Nucl. Phys. B524 (1998) 505-523,
arXiv:hep-ph/9712493.
e+ neutrino neutrino,
Mann, W. A., Kafka, T., Leeson, W.,
Phys. Lett. B291 (1992) 200-205.
,
Michele Maltoni, Thomas Schwetz,
PoS IDM2008 (2008) 072,
arXiv:0812.3161.
IDM2008,
Aug.
18-22,
2008,
Stockholm,
Sweden.
GeV,
Lagutin, A. A., Tyumentsev, A. G., Yushkov, A. V.,
Int. J. Mod. Phys. A20 (2005) 6959,
arXiv:astro-ph/0503092.
in a water Cherenkov detector,
A. Asratyan et al.,
Eur. Phys. J. C31 (2003) 31,
arXiv:hep-ex/0302013.
Authors: