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Physics 2, 91 (2009) – Published November 2, 2009 Optics Particles & Fields Metamaterials Čerenkov radiation with the emission cone reversed has been observed in a metamaterial with negative refractive index. |
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Physics 2, 79 (2009) – Published September 21, 2009 Particles & Fields Gravitation A mathematical formulism makes a step forward in proving the AdS/CFT correspondence that connects quantum mechanics with gravity. |
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Physics 2, 71 (2009) – Published August 24, 2009 A recent theory of gravity has stimulated intense debate and many explorations of its implications. |
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Physics 2, 70 (2009) – Published August 17, 2009 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. |
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Physics 2, 68 (2009) – Published August 10, 2009 Atomic & Molecular Physics Particles & Fields Nuclear Physics 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. |
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Physics 2, 58 (2009) – Published July 6, 2009 Atomic & Molecular Physics Particles & Fields Measuring quantum interference of atomic matter waves may help detect experimental signatures of a fundamental theory of physics. |
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Physics 2, 44 (2009) – Published May 26, 2009 Particles & Fields Astrophysics New connections have been made between experimental astrophysical signatures and theories that unify the electromagnetic, weak, and strong forces, called grand unified theories. |
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Physics 2, 37 (2009) – Published May 4, 2009 Particles & Fields Astrophysics Cosmology New results from the Fermi Gamma-Ray Space Telescope, the most precise to date in the energy range 20 GeV to 1 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. |
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Physics 2, 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. |
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Physics 2, 10 (2009) – Published February 2, 2009 Astrophysics Particles & Fields Cosmology 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. |
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Physics 2, 5 (2009) – Published January 20, 2009 Particles & Fields Nuclear Physics 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. |
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Physics 2, 2 (2009) – Published January 5, 2009 Astrophysics Particles & Fields Cosmology 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. |
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Physics 1, 29 (2008) – Published October 13, 2008 Particles & Fields Nuclear Physics Interdisciplinary Physics Energetic particle jets created in relativistic heavy-ion collisions might create detectable shock waves as they travel through the quark-gluon plasma. |
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Physics 1, 14 (2008) – Published August 18, 2008 Particles & Fields Astrophysics Accelerators New arguments based on astrophysical phenomena constrain the possibility that dangerous black holes will be produced at the CERN Large Hadron Collider. |
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Physics 1, 11 (2008) – Published August 11, 2008 The BABAR collaboration at SLAC has observed the radiative decay of an excited state of bottomonium (the bound state of a bottom quark and its antiparticle) to its ground state |
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Physics 1, 9 (2008) – Published August 4, 2008 Particles & Fields Astrophysics Forty years ago, it was predicted that there would be a sharp cutoff in the intensity of the very-high-energy cosmic rays that strike the earth’s surface. Two collaborations—the HiRes and Auger telescopes—are providing compelling evidence for this so-called “GZK effect.” |
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