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Uranium
(Preview)
Chemists at the University of Virginia have prepared the first uranium methylidyne molecule ever reported, despite the reactivity of uranium atoms with other molecules. This new molecule is a hydrocarbon containing a uranium-carbon triple-bond. Their finding, which contributes to chemists...
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Fundamental Particles
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Title: Masses of Fundamental Particles Authors: Hidezumi Terazawa Not only the masses of fundamental particles including the weak bosons, Higgs scalar, quarks, and leptons, but also the mixing angles of quarks and those of neutrinos are all explained and/or predicted in the unified composite m...
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Dark Matter Time Projection Chamber collaboration
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Title: Dark Matter Time Projection Chamber: Recent R&D Results Authors: J. B. R. Battat, S. Ahlen, M. Chernicoff, C. Deaconu, D. Dujmic, A. Dushkin, P. Fisher, S. Henderson, A. Inglis, A. Kaboth, L. Kirsch, J. P. Lopez, J. Monroe, H. Ouyang, G. Sciolla, H. Tomita, H. Wellenstein The Dark Matter...
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CRESST
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A chance discovery by cosmologists searching for dark matter - the elusive stuff thought to make up most of the mass in the universe - could lead to the development of an ultra-sensitive probe that can spot cracks in materials opening up, even when they're only a few atoms long.
Dark matter detect...
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Exotic mesons
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Title: Evidence for Exotic Meson Production in the Reaction \pi^{-} p \to \eta \pi^{-} p at 18GeV/c Authors: The E852 Collaboration (15 May 1997) The \eta \pi^{-} system has been studied in the reaction \pi^{-} p \to \eta \pi^{-} p$ at 18 GeV/c. A large asymmetry in the angular distribution is observ...
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Atomic clock is 50
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The time-keeping device that governs all aspects of our lives, the atomic clock, is celebrating its 50th year.
The first atomic clock, which uses the resonance frequencies of atoms to keep extremely precise time, was born at the UK's National Physical Laboratory.
Atomic clocks for...
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Crystalline Red Oxygen
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A new evolutionary crystallography algorithm predicts the structure of crystals under a range of extreme pressure and temperature conditions on the basis of the chemical composition alone. One of these crystals would be a form of red-coloured oxygen. Predicting crystal structures is difficul...
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Continuum hypothesis
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The continuum hypothesis, one of mathematics' most famous riddles, may finally have been cracked after 140 years. But the proof involves delving deep not only into the intricacies of infinity, but perhaps beyond mathematics as we know it. A respected US mathematician believes he has cracked it. W...
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Top Quark
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A group of 50 international physicists, led by UC Riverside’s Ann Heinson, has detected for the first time a subatomic particle, the top quark, produced without the simultaneous production of its antimatter partner – an extremely rare event. The discovery of the single top quark could help scient...
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Neutral Xi-sub-b
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Fermilab experiment discovers a heavy relative of the neutron Scientists of the CDF collaboration at the Department of Energy's Fermi National Accelerator Laboratory announced the observation of a new particle, the neutral Xi-sub-b (Xi_b0). This particle contains three quarks: a strange qua...
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Positronium
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Physicists at UC Riverside have created molecular positronium, an entirely new object in the laboratory. Briefly stable, each molecule is made up of a pair of electrons and a pair of their antiparticles, called positrons. The research paves the way for studying multi-positronium interactions u...
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top quark decay
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Title: Interplay of t --> b W Decay and B_q Meson Mixing in Minimal Flavor Violating Models Authors: Jure Drobnak, Svjetlana Fajfer, Jernej F. Kamenik Precise measurements of the top quark decay properties at hadron colliders offer interesting new possibilities of testing the standard model...
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Grand Unified Theory
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Title: A Leptophobic Z' And Dark Matter From Grand Unification Authors: Matthew R. Buckley, Dan Hooper, Jonathan L. Rosner We explore the phenomenology of Grand Unified Models based on the E_6 group, focusing on the Z' with suppressed couplings to leptons that can appear in such models. We find tha...
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Japan Proton Accelerator Research Complex
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Protons are successfully accelerated and transported to J-PARC Hadron Experimental Hall A new milestone was set by the 50 GeV Synchrotron, which is the 3rd and the last stage of the accelerators of the Japan Proton Accelerator Research Complex (J-PARC), on January 27, 2009. Protons were accelera...
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Goldstone Fermion
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Title: Goldstone Fermion Dark Matter Authors: Brando Bellazzini, Csaba Csaki, Jay Hubisz, Jing Shao, Philip Tanedo We propose that the fermionic superpartner of a weak-scale Goldstone boson can be a natural WIMP candidate. The p-wave annihilation of this 'Goldstone fermion' into pairs of Gold...
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