Minutes from 10/15/99 Oscillations Measurements Working Group Meeting


Deborah Harris
Last modified: Tue Oct 26 09:57:25 CDT 1999 Oscillation Measurements Working Group Minutes
Attendees:
Bob Bernstein
Steve Geer
Debbie Harris
Kevin McFarland (by phone)
Steve Parke
Rajendran Raja
Panagiotis Spentzouris
Ray Stefanksi

Literature Search and Secure:

Carl Albright has produced three lists of papers submitted to Los Alamos
preprint server in the past year on the topics of 1: CP violation in neutrino
mixing, 2: Matter effects and 3: Sterile neutrinos. General hope was
expressed that he and Greg Anderson would sift through these papers and
perhaps produce a "top ten" list for each. This list could exist on the web
with links to the papers themselves, with hope that as people read the papers
they could give comments which would also be accessible from this web page.
Peter Shanahan volunteered to read a few of these papers once a few in
particular are suggested.

Matter Effects:

How to implement matter effects was discussed--Irina Mosciou and Bob Shrock
have an analytic program that calculates oscillation probabilities
as a function of neutrino energy/delta m^2, assuming something for the
other delta m^2, as well as the three angles, and a baseline length. It
is not ready for public consumption but they have promised to give
parameterizations of the probabilities as a function of energy/deltam^2
for a given choice of other parameters. Bob will contact them and invite
Irina to come give a talk on the program, and ask them for the
parameterizations for the 3 specific baseline lengths (732,2880,7332),
in the scenario outlined by the theory group this past Tuesday.
We can then automatically use these parameterizations for neutrino beams
arising from different energy muon beams.
Steve Geer is working on implementing 3-family mixing into his matter
effects code, which assumes a given length, energy, 3 mixing angles,
and 2 delta m^2. Steve should be generating files for the simulators
to use shortly. (They will be accessible from these web pages!).
Checking the two matter effects codes against eachother (Geer/Mosciou)
would be a good test for both.

Electron Charge Discrimination:

We then discussed electron charge identification, and if there was
any way it could happen in a large detector. Kevin suggested that
one should also check statistical methods, using the fact that the
neutrino and antineutrino cross sections were different and using
both signs of muon beams.

Raja pointed out that we should also be considering detectors that could
measure the electron charge in an oscillation experiment. He volunteered
to look into putting a large magnet around an ICARUS-type detector, or
to put in magnetized plates. Kevin pointed out that measuring
electron charge in such a heavy detector might be problematic because
of multiple scattering, or more precisely, the first scatter the electron
undergoes. Raja will also be looking into polarization effects and how
that might be used in this beamline.