[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, Oct. 31, 2016
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L102

Michael Wagman
University of Washington

QCD Matrix Elements for Neutron-Antineutron Oscillations

The observed matter-antimatter asymmetry of the universe is an 
outstanding mystery of physics that cannot be explained within the 
Standard Model. Many beyond the Standard Model (BSM) explanations have 
been proposed, and experimental data is needed to constrain the wide 
space of BSM models. Neutron-antineutron oscillations are predicted to 
be a signature of some BSM baryogenesis models and can be cleanly probed 
by low-energy experiments. Connecting experimental data on 
neutron-antineutron transition rates to fundamental BSM theory 
parameters requires QCD matrix elements of six-quark operators 
effectively parametrizing BSM physics at low energies. I will discuss 
work to calculate neutron-antineutron transition matrix elements using 
lattice QCD and the renormalizing group. I will highlight how these QCD 
results can be used to reliably assess the reach of current and future 
neutron-antineutron experiments into BSM parameter space.