96 research outputs found
Recent Results from the MINOS experiment
MINOS is an accelerator neutrino oscillation experiment at Fermilab. An
intense high energy neutrino beam is produced at Fermilab and sent to a near
detector on the Fermilab site and also to a 5 kTon far detector 735 km away in
the Soudan mine in northern Minnesota. The experiment has now had several years
of running with millions of events in the near detector and hundreds of events
recorded in the far detector. I will report on the recent results from this
experiment which include precise measurement of , ~analysis
of neutral current data to limit the component of sterile neutrinos, and the
search for conversion. The focus will be on the analysis of
data for conversion. Using data from an exposure of
protons on target, we have selected electron type events
in both the near and the far detector. The near detector is used to measure the
background which is extrapolated to the far detector. We have found 35 events
in the signal region with a background expectation of . Using this observation we set a 90% C.L. limit of for and normal mass hierarchy. Further
analysis is under way to reduce backgrounds and improve sensitivity.Comment: This was prepared for the proceedings of the XIII International
Workshop on Neutrino Telescopes at the Istituto Veneto di Scienze, Lettere ed
Arti in Venice, Italy held on March 10-13, 2009. The presentation was on
behalf of the MINOS collaboratio
Status of the MINOS experiment
I will present the status of the long baseline neutrino oscillation
experiment MINOS at Fermi National Accelerator Laboratory (Fermilab). I will
summarize the status of the detector and beam construction, the expected event
rates and sensitivity to physics. I will also comment on possible future plans
to improve the performance of the experiment.Comment: Invited talk at the Seventh International Workshop on Tau Lepton
Physics (TAU02), Santa Cruz, Ca, USA, Sept 2002, 7 pages, 6 figures, LaTeX
Higher res figures at http://minos.phy.bnl.gov/~diwan/tau02_th08.p
Forward production of prompt neutrinos from charm in the atmosphere and at high energy colliders
The high-energy atmospheric neutrino flux is dominated by neutrinos from the
decays of charmed hadrons produced in the forward direction by cosmic ray
interactions with air nuclei. We evaluate the charm contributions to the prompt
atmospheric neutrino flux as a function of the center-of-mass energy
of the hadronic collision and of the center-of-mass rapidity of the
produced charm hadron. Uncertainties associated with parton distribution
functions are also evaluated as a function of . We find that the
coverage of LHCb for forward heavy-flavour production, complemented by the
angular coverage of present and future forward neutrino experiments at the LHC,
bracket the most interesting regions for the prompt atmospheric neutrino
flux. At TeV foreseen for the HL-LHC phase, nucleon collisions in
air contribute to the prompt neutrino flux prominently below ~GeV. Measurements of forward charm and/or forward neutrinos produced in
hadron collisions up to TeV, which might become possible at the
FCC, are relevant for the prompt atmospheric neutrino flux up to
GeV and beyond.Comment: 29 pages, 11 figure
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