Browse Physics

The first results from the space-borne Alpha Magnetic Spectrometer confirm an unexplained excess of high-energy positrons in Earth-bound cosmic rays.

The ATRAP Collaboration has measured the magnetic moment of the antiproton more precisely than ever before, allowing a new test of $CPT$ symmetry.

$D$-mesons are the fourth in a quartet of neutral mesons to be observed oscillating into their antiparticle partners.

Much can be learned about hypothetical particles called axions by studying the evolution of massive stars.

Measurement of a rare-meson decay is an experimental achievement worth celebrating, but so far, no new physics beyond the standard model is indicated.

The population of Upsilon mesons in quark-gluon plasma can be used to measure the plasma’s temperature.

An analog of the dynamical Casimir effect has been achieved, where phonons replace photons and thermal fluctuations replace vacuum fluctuations.

An experiment studying B meson decays makes a direct observation of time-reversal violation without relying on assumed relationships with other fundamental symmetries.

Producing quark-gluon matter from higher-energy nuclear collisions will give insight into its fluidlike properties.

Two collaborations at the Tevatron have combined data from their searches for the Higgs boson and report evidence of a new particle decaying into heavy quark pairs. This could be the first experimental evidence that the same mechanism that gives mass to the carriers of the weak force also underlies the mass of quarks.

The Daya Bay Collaboration in China has discovered an unexpectedly large neutrino oscillation.

There are encouraging hints that the Higgs boson may have been observed at the Large Hadron Collider.

Differences between the decay properties of charm-carrying mesons and those of their antiparticles may carry clues to the mystery of the missing antimatter in the Universe.

A search for evidence of particles predicted by supersymmetry—a favored extension of the standard model—suggests that if the theory is correct, it may be more complicated to discover these particles than previously thought.

Researchers predict that Majorana fermions can be found in magnetic field vortices in the bulk of the superconductor ${\text{Cu}}_x{\text{Bi}}_2{\text{Se}}_3$.

The T2K collaboration in Japan sees strong hints of muon neutrino to electron neutrino oscillation.

Researchers report a possible difference between muon neutrino and muon antineutrino disappearance, which if confirmed will have serious implications for our current theoretical understanding.

Researchers have detected spin flips of a single proton, a first step toward precision measurements of the antiproton’s spin magnetic moment.

Results from the first search for supersymmetry at the LHC have arrived.

An ideal place to look for new physics beyond the standard model is a rare particle decay, and new calculations are providing a highly accurate picture of what to expect.