High Energy Physics Seminar

Low-energy effective field theories based upon the symmetries of QCD are well developed for applications to few-nucleon systems. The symmetries of QCD do not, however, constrain the coefficients, which are unknown absent the ability to match to the underlying theory, or a lattice QCD computation, or experiment. Utilizing additional approximate symmetries of nature, including the large-number -of-colors limit and the unitary limit, is useful both because they reduce the number of low energy coefficients present at any order, and because they can illuminate potential universal properties that might explain why parameters take the values they do. Further, for physics beyond the standard model, they can be used to
estimate the dominant interactions.

The talk is in 469 Lauritsen.

Contact theoryinfo@caltech.edu for Zoom link.