15,253 research outputs found
Three-family oscillations using neutrinos from muon beams at very long baseline
The planned LBL experiments will be able to prove the hypothesis of flavor
oscillation between muon and tau neutrinos. We explore the possibility of a
second generation long baseline experiment at very long baseline, i.e. L in the
range 5000-7000 km. This distance requires intense neutrino beams that could be
available from very intense muon beams as those needed for colliders.
Such baselines allow the study of neutrino oscillations with with neutrinos of energy , i.e.
above tau threshold. Moreover, matter effects inside the Earth could lead to
observable effects in oscillations. These effects are
interchanged between neutrinos and antineutrinos, and therefore they can be
tested by comparing the oscillated spectra obtained running the storage ring
with positive and negative muons.Comment: 14 pages, 4 figure
A medium baseline search for oscillations at a beam from muon decays
The accurate knowledge of the beam produced in
decays and the absence of contamination, make a future
muon storage ring the ideal place to look for \numunue (\numubarnuebar)
oscillations. Using a detector capable of electron and muon identification with
charge discrimination (e.g., the presently running NOMAD experiment), good
sensitivities to \numunue (\numubarnuebar) oscillations could be achieved.
With the CERN-PS as a proton driver for a muon storage ring of the kind
envisaged for a -collider, the LSND claim would be confirmed or disproved
in a few years of running.Comment: 10 pages, 4 figure
Interior maps in posterior pareital cortex
The posterior parietal cortex (PPC), historically believed to be a sensory structure, is now viewed as an area important for sensory-motor integration. Among its functions is the forming of intentions, that is, high-level cognitive plans for movement. There is a map of intentions within the PPC, with different subregions dedicated to the planning of eye movements, reaching movements, and grasping movements. These areas appear to be specialized for the multisensory integration and coordinate transformations required to convert sensory input to motor output. In several subregions of the PPC, these operations are facilitated by the use of a common distributed space representation that is independent of both sensory input and motor output. Attention and learning effects are also evident in the PPC. However, these effects may be general to cortex and operate in the PPC in the context of sensory-motor transformations
- …