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,
Tel (Office): (865) 574-6124 (FAX): (865) 574-1268
The universe today is dominated by matter over antimatter, but why remains a mystery. The observation of neutrinoless double-beta decay would prove that lepton number is not a conserved quantity, which could explain the origin of the matter-antimatter asymmetry. However, if it occurs, 0vBB must be exceedingly rare, with current half-life limits over 10^24 years. Measuring a process with such a faint signal requires extraordinary efforts to eliminate backgrounds. The MAJORANA DEMONSTRATOR is a search for neutrinoless double beta decay of germanium-76 with the goal of “demonstrating" backgrounds low enough to justify building a larger experiment with ~1 tonne of isotope. I will review the design and background reduction strategies of the DEMONSTRATOR, show the present background and physics results, and comment on strategies to use advanced model-based signal processing methods to further reduce backgrounds as we look toward the tonne scale.
Contact: Alfredo Galindo-Uribarri, (865) 574-6124