Theory HEP Seminar

Low Energy Effective Theory for Axion Strings

Michael Dine

Santa Cruz

I will discuss aspects of the low energy description of global cosmic strings. In the non-relativistic limit, we will see that in a formal sense these are described by a combination of the Nambu-Gotto and Kalb-Ramond actions, the collective coordinates of the system do not provide a complete description for more than brief intervals; as time evolves it becomes necessary to include low momentum goldstone excitations as well.