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SUMMARY:Updates on fundamental science from the secondary CMB - Matthew Jo
 hnson (Perimeter Institute and York University)
DTSTART:20250506T120000Z
DTEND:20250506T130000Z
UID:TALK229354@talks.cam.ac.uk
CONTACT:Thomas Colas
DESCRIPTION:A major frontier in cosmic microwave background (CMB) science 
 is the study of secondary anisotropies—temperature and polarization anis
 otropies induced by the gravitational\, electromagnetic\, or beyond-standa
 rd-model (BSM) interactions of CMB photons with large-scale structure (LSS
 ) over cosmic history. Leveraging their distinct statistical properties an
 d cross-correlations with LSS enables us to isolate these secondary anisot
 ropies from the primary CMB and extract new astrophysical and cosmological
  information. In this talk\, I discuss how secondary anisotropies from ele
 ctromagnetic interactions (Sunyaev-Zel’dovich effects) and hypothetical 
 BSM particles (dark screening) can serve as probes of fundamental physics.
  I present a general formalism for capturing the information content of se
 condary anisotropies. I then give a summary of existing measurements of th
 e kinetic Sunyaev-Zel’dovich (kSZ)\, polarized Sunyaev-Zel’dovich (pSZ
 )\, and dark screening effects. Next I provide an update on how these meas
 urements constrain large-scale homogeneity\, primordial non-Gaussianity\, 
 isocurvature\, and BSM particles (axions and dark photons). Looking ahead 
 to the high-resolution\, low-noise\, large-volume frontier\, I discuss how
  upcoming observations from the Simons Observatory\, combined with LSS sur
 veys like DESI and LSST\, will significantly improve these results and all
 ow for novel tests of fundamental physics.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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