Jul 22 – 27, 2018
US/Eastern timezone

Non-relativistic effective field theory of scalar field and longevity of condensates

Jul 26, 2018, 2:40 PM


Talk Theory 4.4 Axions


Dr Masaki Yamada (Tufts University)


Ultra light bosonic dark matter like axion may form long-lived condensate. The longevity of the condensate can be understood by the approximate number conservation in the non-relativistic regime. The profile of condensate is obtained via the bounce method, just like Q-balls, as long as the number violating interaction is weak enough. I will discuss the decay processes of the condensate by the number violating interaction, namely the production of relativistic modes. I will show that there are some attractor behaviors during the evolution of condensate that enhance the lifetime.

Primary authors

Dr Kyohei Mukaida (DESY) Dr Masahiro Takimoto (Weizmann Institute of Science) Dr Masaki Yamada (Tufts University)

Presentation materials