Browse Physics

A single neutrino left over from the big bang may have a quantum wave (wave function) that stretches across the universe.

Detectors buried beneath the Antarctic ice place stringent limits on the presence of dark matter particles, called neutralinos, in the sun.

New results from the Fermi Gamma-Ray Space Telescope, the most precise to date in the energy range $20\text{GeV}$ to $1\text{TeV}$, 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.

Two antimatter measurements performed by the PAMELA experiment appear to lead to conflicting results. Now, theorists are exploring the extent to which these measurements can be reconciled.

Interactions between dark matter particles may explain unusual matter-antimatter production rates in the universe.

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.

New upper limits on the spin-independent interaction of WIMPs and nucleons marks the latest volley in the worldwide effort to detect and identify particle dark matter.

Mounting evidence seems to rule out weakly interacting massive particles (WIMPs ) as the source of a so-far unexplained signal in the DAMA/LIBRA experiments.

Dark matter arising from extra spatial dimensions could be detected with existing or future experiments.

The 2002 Nobel Prize in Physics went to three experimentalists who opened the window on cosmic neutrinos and x rays.

WIMPs, particles that may solve the dark matter mystery, have still not been detected by the most sensitive search yet.

New estimates of extragalactic magnetic fields may resolve the long-standing mystery regarding the sources of the highest energy cosmic rays.