BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Testing the equivalence principle in the dark sector - Emanuele Ca
 storina (Milan)
DTSTART:20230123T130000Z
DTEND:20230123T140000Z
UID:TALK196084@talks.cam.ac.uk
CONTACT:Dr  Dong-Gang Wang
DESCRIPTION:The equivalence between the inertial and gravitational mass is
  built-in the formulation of General Relativity as the curvature of space 
 time. In the visible sector\, the equivalence principle has been tested wi
 th extraordinary precision\, but very little is known about the presence o
 f long range fifth forces in the dark sector. In this talk I will describe
  how we can use cosmological data to test if dark matter violates the equi
 valence principle. The Universe itself will act as a scale\, measuring whe
 ther dark matter particles fall in the same way as ordinary particles. Aft
 er discussing the main effects of dark fifth forces on cosmological observ
 ables like the CMB and matter power spectrum\, I will present the constrai
 nts on the strength of the new interaction using Planck and Large Scale St
 ructure data. Our results indicate that equivalence principle violations i
 n the dark sector are at most a few parts in one thousand\, which is the b
 est available bound on such new forces. Some implications of these bounds 
 for the direct detection of dark matter will also be discussed.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
END:VEVENT
END:VCALENDAR