QnAs with Sean B. Carroll.

Dark-Matter-Induced Weak Equivalence Principle Violation

The enemy of my enemy is my friend The Serengeti Rules: The Quest to Discover How Life Works and Why it Matters Sean B. Carroll (Princeton University Press, Princeton, NJ; 2016) ISBN: 9781400880263

species barrier in the early phase of farming and became less fatal when they established an equilibrium with their new human hosts (Curr. Biol. (2013) 23, R667–R670), diseases like the plague do not depend on human hosts and are therefore able t maintain a high rate of mortality. Thus, the present truce between Yersinia and our species depends heavily on the achievements of modern medicine, in...

Lecture Notes on General Relativity

These notes represent approximately one semester’s worth of lectures on introductory general relativity for beginning graduate students in physics. Topics include manifolds, Riemannian geometry, Einstein’s equations, and three applications: gravitational radiation, black holes, and cosmology. Individual chapters, and potentially updated versions, can be found at http://itp.ucsb.edu/~carroll/not...

Why Boltzmann Brains Don ’ t Fluctuate Into Existence From the De Sitter Vacuum Kimberly

Dark matter and dark radiation

Lotty Ackerman, Matthew R. Buckley, Sean M. Carroll, and Marc Kamionkowski California Institute of Technology, Pasadena, California 91125, USA (Received 16 December 2008; published 23 January 2009) We explore the feasibility and astrophysical consequences of a new long-range Uð1Þ gauge field (‘‘dark electromagnetism’’) that couples only to dark matter, not to the standard model. The dark matter...