Mary Bishai
(Brookhaven National Laboratory)
27/07/2009, 14:00
Neutrino Physics
Man-made sources of neutrinos from nuclear reactors and particle
accelerators provide a well understood source of neutrinos. Reactors
are a powerful source of anti-electron neutrinos with energies in the
0.1 - 10 MeV range and a flux of order 10^20 neutrinos/GWth. High
intensity proton accelerators produce high purity muon neutrino and
anti-muon neutrino beams with energies in the range...
Roger Wendell
(Duke University)
27/07/2009, 14:30
Neutrino Physics
In contrast to the predictions of the Standard Model of particle physics, experimental data now indicate that neutrinos are massive and undergo flavor oscillations. Indeed, the oscillations of $\nu_{e}$ to $\nu_{x}$ within the sun are now the favored explanation for the discrepancy between the Standard Solar Model's electron neutrino flux prediction and the flux measurements of the solar...
Byeongsu Yang
(Seoul National University)
27/07/2009, 15:00
Neutrino Physics
The full Super-Kamiokande-III data-taking period, which ran from August of 2006 through August of 2008, yielded 298 live days worth of solar neutrino data with a lower total energy threshold of 4.5 MeV. During this period we made many improvements to the experiment's hardware and software, with particular emphasis on its water purification system and Monte Carlo simulations. As a result of...
Jennifer Raaf
(Boston University)
27/07/2009, 15:20
Neutrino Physics
We present recent results from analyses of atmospheric neutrino data using the Super-Kamiokande water Cherenkov detector, which has a fiducial volume of 22,500 tons of ultra-pure water. Data from three major running periods of SK are used in the analyses.
Ryan Patterson
(California Institute of Technology)
27/07/2009, 15:40
Neutrino Physics
MINOS is a long baseline neutrino oscillation experiment situated along Fermilab's high-intensity NuMI neutrino beam. The beam traverses two large iron-scintillator tracking calorimeters: the 0.98 kton near detector located 1 km from the production target and the 5.4 kton far detector sited 735 km downstream in the Soudan mine in northern Minnesota. By looking for an excess of candidate...
Pedro Ochoa
(Caltech)
27/07/2009, 16:30
Neutrino Physics
The reach of the search for electron-neutrino appearance in the MINOS far detector, a process which would manifest a non-zero value of the $\theta_{13}$ mixing angle, depends primarily on the ability to separate the signal from the backgrounds. MINOS is using two different approaches for event classification. One selector is an artificial neural network, which relies on topological variables...
Sanjay Swain
(Stanford University)
27/07/2009, 16:50
Neutrino Physics
The MINOS experiment at Fermilab uses two functionally identical detectors,
the near detector at Fermilab and the far detector at Soudan Mine in
Minnesota, to search for the muon-neutrino to electron-neutrino
oscillations and potentially constrain the last unknown mixing angle in the
3-flavor lepton mixing matrix. In order to estimate the backgrounds in the far
detector, where the...
Dr
Istvan Danko
(University of Pittsburgh)
27/07/2009, 17:10
Neutrino Physics
The MINOS long-baseline neutrino experiment has confirmed the disappearance of accelerator muon-neutrinos and measured the $|\Delta m^2_{23}|$ mass splitting with the best precision to date. The MINOS experiment is now set to measure the disappearance of muon anti-neutrinos and their oscillation parameters, which can be used to test CPT violation and other exotic models. The magnetic field of...
Dr
Alexandre Sousa
(Harvard University)
27/07/2009, 17:30
Neutrino Physics
A search for disappearance of active neutrinos over a baseline of 735 km was conducted using the NuMI neutrino beam and the MINOS detectors. The data analyzed correspond to an exposure of 3.18x10^20 protons-on-target.
The data are fitted to neutrino oscillation models in which mixing with one sterile neutrino is assumed. A comparison of the neutral-current-like spectrum at the far detector...
Andrew Norman
(University of Virginia)
27/07/2009, 17:50
Neutrino Physics
The NOvA Experiment is a new accelerator based, long baseline, neutrino oscillation experiment which is beginning construction at Fermilab. NOvA is designed to probe with new precisions and sensitivities the theta_13 and theta_23 mixing angles of the PMNS matrix, while simultaneously having significant sensitivity to the CP violating phase delta and resolution of the neutrino mass hierarchy. ...
Mr
TRUNG LE
(STONY BROOK UNIVERSITY)
27/07/2009, 18:10
Neutrino Physics
Neutrino oscillations were discovered in solar and atmospheric neutrinos experiments, and have been confirmed by experiments using neutrino beams from accelerators and nuclear reactors. It has been found that there are large mixing angles in the nue to numu and numu to nutau oscillations. The third mixing angle, which parameterizes the mixing between the first and the third family, is...