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Particle physics


— Science

Prime candidate crossed off list in search for dark matter particle

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) in Dresden, Germany have analyzed data from the HADES particle detector and concluded that the so-called "dark photons" are not the constituents of dark matter. Dark photons, or U bosons, are hypothetical particles that had thus far been the main candidate for that role, and this new result could make the search for the dark matter particle even more challenging than before. Read More
— Science Feature

Archaeology vs. Physics: Conflicting roles for old lead

The study of archaeology has long been carried out using tools from the physics lab. Among these are carbon-14 dating, thermoluminescence dating, x-ray photography, x-ray fluorescence elemental analysis, CAT and MRI scanning, ground-penetrating sonar and radar, and many others. What is less well known is that archaeology has also made substantial contributions to physics. This is the story of old lead; why it is important to physics, and what ethical problems it presents to both sciences. Read More
— Science

Quantum black hole study opens bridge to another universe

Physicists have long thought that the singularities associated with gravity (like the inside of a black hole) should vanish in a quantum theory of gravity. It now appears that this may indeed be the case. Researchers in Uruguay and Louisiana have just published a description of a quantum black hole using loop quantum gravity in which the predictions of physics-ending singularities vanish, and are replaced by bridges to another universe. Read More
— Science

Revamped Fermilab neutrino beam offers hope for new physics

Particle physicists have been eagerly awaiting the first trials of the new Main Injector neutrino beam at the Fermi National Accelerator Laboratory in the US. This new facility is the result of reconfiguration of the Fermilab particle accelerators in the wake of the shutdown of the Tevatron in 2011. The new beam source is now online, and is well on route to becoming the world's most intense focused neutrino source. Read More
— Science Feature

Dark matter, WIMPS, and NASA's Alpha Magnetic Spectrometer data

Recently the media has been saturated with overly-hyped reports that NASA's Alpha Magnetic Spectrometer (AMS) may have detected dark matter. These claims may have some justification if the word "may" is shouted, but they rest on a number of really major assumptions and guesses, some of which are on weak and shifting soil. So just what was seen in the experiment, and what are the possible explanations? Read More
— Science

Japan frontrunner to get International Linear Collider

According to Nature, Japan is the frontrunner for the planned International Linear Collider (ILC), for which Europe and the United States are also in the running to host. Scientists and engineers are already examining potential sites in the island nation for the US$7 to $8 billion machine, which is intended to complement the Large Hadron Collider (LHC) at CERN. The head of the global design effort for the ILC, physicist Barry Barish, presented finalized blueprints at a ceremony in Tokyo earlier this month. Read More
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