High Energy Physics Seminar - Eric Braaten (The Ohio State University) Axion Stars

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Eric Braaten (The Ohio State University) 9/17/18 High Energy Physics Seminar speaker
September 17, 2018
3:30PM - 4:30PM
Location
4138 Physics Research Building

Date Range
Add to Calendar 2018-09-17 15:30:00 2018-09-17 16:30:00 High Energy Physics Seminar - Eric Braaten (The Ohio State University) Axion Stars

The particle that makes up the dark matter of the universe could be an axion or some other light boson.  A collection of  axions can condense into a gravitationally bound Bose-Einstein condensate called an axion star.  It is possible that a significant fraction of the axion dark matter is in the form of axion stars.  This would make some efforts to identify the axion as the dark matter particle more challenging, but it would also open up new possibilities.  I will summarize the basic properties of axion stars and other gravitationally bound or self-bound condensates of spin-0 particles.  Axions are naturally described by a relativistic field theory with a real scalar field, but low-energy axions can be described more simply by a classical nonrelativistic effective field theory with a complex scalar field.


4138 Physics Research Building Department of Physics physics@osu.edu America/New_York public
Description

The particle that makes up the dark matter of the universe could be an axion or some other light boson.  A collection of  axions can condense into a gravitationally bound Bose-Einstein condensate called an axion star.  It is possible that a significant fraction of the axion dark matter is in the form of axion stars.  This would make some efforts to identify the axion as the dark matter particle more challenging, but it would also open up new possibilities.  I will summarize the basic properties of axion stars and other gravitationally bound or self-bound condensates of spin-0 particles.  Axions are naturally described by a relativistic field theory with a real scalar field, but low-energy axions can be described more simply by a classical nonrelativistic effective field theory with a complex scalar field.