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Post by quarkgluon plasma on Feb 26, 2012 16:16:28 GMT -8
Scientists theoretically ‘perfect’ the ‘perfect fluid’ 18 January 2012 Austria: New theoretical results have shown that quark-gluon plasma – an ultra-hot liquid generated by heavy-ion collisions in particle accelerators – could be even less viscous, and therefore more ‘perfect’, than was thought possible by previous theories. <snip> According to Dominik Steineder from the Institute for Theoretical Physics at the Vienna University of Technology, however, this record for low viscosity can still be broken. Professor Anton Rebhan, who supervised Steineder’s PhD research thesis into the viscosity of quark-gluon plasma, said: “Using string theory, the quantum field theory of quark-gluon plasma can be related to the physics of black holes in higher dimensions. So we are solving equations from string theory and then transfer the results to the physics of the quark-gluon plasma.” www.paneuropeannetworks.com/detail/news/scientists-theoretically-perfect-the-perfect-fluid-.html
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Post by Majorana fermion on Apr 21, 2012 12:16:17 GMT -8
Mysterious Particle Found After Decades of Searching Date: 16 April 2012 Time: 02:30 PM ET Excerpt: While the evidence is strong, there are still more experiments to do to confirm the finding. But that may be fitting: Majorana himself was, by many accounts, a brilliant physicist. (He was the first to propose a theoretical basis for the existence of neutrons.) But in 1938, he took a boat trip from Naples to Palermo and disappeared. His body was never found, and the circumstances of his disappearance have remained mysterious. Wacky particlesElementary particles come in two types: fermions and bosons. Fermions are particles such as electrons, leptons and quarks (which themselves make up protons and neutrons). Fermions make up matter and obey the Pauli Exclusion Principle, which says two particles can't be in the same quatum state at the same time. (This is why two protons or neutrons, for instance, can't be in the same place at once). Bosons are things such as photons and W particles, which carry forces. www.livescience.com/19707-mysterious-majorana-fermion-particle.html
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Post by GRBs on Apr 23, 2012 12:31:21 GMT -8
Cosmic ray source riddle mystery now even more mysterious Eggheads stumped after killer gamma rays ruled out. Probably 19th April 2012 12:18 GMT Astroboffins only had two theories about what causes cosmic rays, which regularly penetrate Earth's atmosphere: huge explosions out in space or supermassive black holes. Now an international group, made up of no fewer than 250 physicists and engineers, says that the suspected gamma radiation bursts are unlikely to be the source for cosmic rays because they couldn't find any neutrinos emitted from the mother-of-all space bangs they observed. Cosmic rays are electrically charged subatomic particles with energies of up to one hundred million times more than those created in manmade accelerators such as the Large Hadron Collider. A gamma ray, meanwhile, is high-energy electromagnetic radiation that's harmful to life. Using the IceCube Neutrino Observatory at the South Pole in Antarctica, the boffins watched 300 gamma ray bursts (GRBs) while searching for the neutrinos that are believed to be linked with cosmic ray generation, and found none. www.theregister.co.uk/2012/04/19/cosmic_rays_gamma_ray_bursts/
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Post by moabiter on Dec 30, 2013 8:35:46 GMT -8
Alien neutrinos reveal new frontier in astronomy at Antarctica's IceCube Nov. 21, 2013 at 2:26 PM ET A collection of 28 weird high-energy neutrino hits from far beyond the solar system represents the beginning of a new age of astronomy — and the new neutrino astronomers say they already have more data yet to report. "This is something we've launched now," the University of Wisconsin's Francis Halzen, principal investigator for the international IceCube observatory in Antarctica, told NBC News. www.nbcnews.com/science/alien-neutrinos-reveal-new-frontier-astronomy-antarcticas-icecube-2D11624193
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