Oak Ridge National Laboratory

Physics Division

Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics related subjects. Usually these are held in the Building 6008 large Conference Room, at 3:00 pm on the chosen day, but times and locations may vary. For more information, contact our seminar chairman,

Alfredo Galindo-Uribarri
Tel (Office): (865) 574-6124  (FAX): (865) 574-1268


Thu., February 16, 2012, at 3:00 p.m. (refreshments at 2:40 p.m.)

Neutrino Oscillation and CP violation studies using accelerator-produced decay-at-rest sources

Jose R. Alonso for the DAEäALUS Collaboration LNS-MIT, Cambridge MA
Building 6008 Conference Room

Neutrino physics is very much at the forefront of today's research. Large detectors installed in deep underground locations study neutrino masses, CP violation, and oscillations using neutrino-sources including long- and short-baseline beams of neutrinos from muons decaying in flight. DAEdALUS looks at neutrinos from stopped muons, “Decay At Rest (DAR)” neutrinos. The DAR neutrino spectrum has no electron antineutrinos (nu-e-bar) (essentially all pi-minus' produced are absorbed before decaying), so a detector with much hydrogen (water-Cherenkov or liquid scintillator) is sensitive to appearance of nu-e-bar’s oscillating from nu-mu-bar via inverse- beta-decay. Oscillations are studied using shorter baselines, less than 20 km reaching the same oscillation parameters (L/E ratio) as the current and planned high-energy neutrino beams from Fermilab. As the neutrino flux is not variable, nor is the energy, the baseline is varied, plans call for 3 accelerator-based neutrino sources at 1.5, 8 and 20 km with staggered beam-on cycles. A new concept for exploring sterile neutrinos involves short-baseline studies (10

Contact: (A. Galindo-Uribarri; 5746124)