New results from the Fermi Gamma-Ray Space Telescope, the most precise to date in the energy range to , should help resolve whether cosmic rays composed of the lightest charged particles, i.e., electrons and positrons, come from dark matter or some other astrophysical source.
Physics2, 21 (2009) – Published March 16, 2009
Study of variations in the mass and interactions of quarks may reveal whether fundamental constants are governed by “environmental selection rules” that lead to complex universes capable of having observers.
Physics2, 10 (2009) – Published February 2, 2009
Many cosmologists believe that antiprotons in cosmic rays come from the annihilation of dark matter. Data from the PAMELA experiment on board a Russian satellite provide an important test of this possibility.
Dam T. Son,
Physics2, 5 (2009) – Published January 20, 2009
The critical point is one of the main features of the phase diagram of strongly interacting quark-gluon matter. Finding this critical point in the lab will require luck and an understanding of the possible experimental signatures.
Branes are multidimensional objects that arise in the formulation of string theory. Finding more general ways to describe these objects mathematically often leads to new insights into string theory itself.