Browse Physics

The first experiments to study the quark-gluon plasma at the LHC reveal that even at the hottest temperatures ever produced at a particle accelerator, this extreme state of matter remains the best example of an ideal liquid.

A set of proposed relations among observable quantities may allow strong tests of whether a rapid expansion of the very early universe produced the seeds of the large-scale structure we see today.

Theorists have predicted that spectacular signals of supersymmetry should be visible at the LHC.

The experimental realization of quantum degenerate cold Fermi gases with large hyperfine spins opens up a new opportunity for exotic many-body physics.

Results from the first three weeks of running the XENON100 experiment show its promise as a sensitive detector of particle dark matter in the form of WIMPs.

Searches for new sources of CP violation are a staple of high-energy physics; a recent result presents an effect that could be a sign of new physics beyond the standard model.

A comparison between the density in surrounding galaxies today and a few billion years ago provides a new upper bound on neutrino mass.

Circular motion of a parton generates radiation patterns similar to those of synchroton radiation in electromagnetism.

New calculation of quark matter properties tells us what an exotic quark-neutron star might look like.

The race for realizing Majorana fermions—elusive particles that act as their own antiparticles—heats up, but we still await ideal materials to work with.

New measurements with the Fermi Large Area Telescope extend our knowledge of the extragalactic diffuse gamma-ray background and may help resolve the question of its origins.

The two experimental collaborations at the Fermilab Tevatron accelerator have published first results of searches for the Higgs boson, excluding parts of the otherwise allowed mass range.

A recent theory of high-energy bottom quark jet quenching in nuclear collisions accentuates the novelty of heavy quark jet dynamics in strongly coupled quark-gluon plasmas discovered at the Relativistic Heavy Ion Collider.

The STAR detector at RHIC has measured a signal that may indicate parity violation occurs in metastable regions of the superdense matter.

The insights of a provocative connection between general relativity and quantum field theory, called the AdS/CFT correspondence, have been extended to rotating black holes that can occur astrophysically.

Čerenkov radiation with the emission cone reversed has been observed in a metamaterial with negative refractive index.

A mathematical formulism makes a step forward in proving the AdS/CFT correspondence that connects quantum mechanics with gravity.

A recent theory of gravity has stimulated intense debate and many explorations of its implications.

Quantum field theoretic extensions of Einstein’s theory of gravity tend to suffer from incurable infinities, but a theory called $N=8$ supergravity may actually avoid them—against expectations held for almost 30 years.

A huge, predicted atomic parity violation has now been observed in ytterbium, further aiding tabletop experimental searches for physics beyond the standard model that complement ongoing efforts at high-energy colliders.