BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:HET Seminar: "Friendship in the Axiverse" Jed Thompson (Stanford)
DTSTART:20211011T160000
DTEND:20211011T170000
DTSTAMP:20260506T205203Z
UID:a1df6b999a902d40ca3d04f65c59f1333676367fc2141e2d5d32c4c4
CATEGORIES:Conferences - Seminars
DESCRIPTION:Brian Henning brian.henning@epfl.ch\n"Friendship in the Axiver
 se"\n\nA generic low-energy prediction of string theory is the existence o
 f a large collection of axions commonly known as a string axiverse.  In a
  realistic axiverse\, string axions can be distributed densely over many o
 rders of magnitude of mass\, and are expected to interact with one another
  through a joint potential.  I will show that non-linearities in this pot
 ential lead to a new type of resonant energy transfer between axions with 
 nearby masses.  This resonance is not captured by linearized treatments p
 reviously discussed in the literature\, and generically results in a trans
 fer of energy density from axions with larger decay constants to those wit
 h smaller decay constants\, leading to a multitude of late-time signatures
 .  These include enhanced direct detection prospects for a resonant pair 
 comprising even a small subcomponent of dark matter (DM)\, and boosted sma
 ll-scale structure if the pair is the majority of DM.  Near-future iterat
 ions of experiments such as ADMX and DM Radio will be sensitive to this sc
 enario\, as will astrophysical probes of DM substructure.
LOCATION:https://epfl.zoom.us/j/64157413903?pwd=Rjl5QW42WENhNXJrd2VKL3lOWn
 hidz09
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR