Latest Standard Model Stories
Dying, for stars, has just gotten more complicated.For some stellar objects, the final phase before or instead of collapsing into a black hole may be what a group of physicists is calling an electroweak star.Glenn Starkman, a professor of physics at Case Western Reserve University, together with former graduate students and post-docs De-Chang Dai and Dejan Stojkovic, now at the State University of New York in Buffalo, and Arthur Lue, at MIT's Lincoln Lab, offer a description of the structure...
Fermilab team of physicists analyze two-lepton dataNew high-energy particle research by a team working with data from Fermi National Accelerator Laboratory further heightens the uncertainty about the exact nature of a key theoretical component of modern physics "” the massive fundamental particle called the Higgs boson.Analysis of data from particle collisions resulting in two leptons helps improve measurements of the mass of another heavy subatomic particle called the top quark, says...
Scientists at the University of California, Berkeley, and Lawrence Berkeley National Laboratory in the US, have performed sophisticated laser measurements to detect the subtle effects of one of nature's most elusive forces - the "weak interaction". Their work, which reveals the largest effect of the weak interaction ever observed in an atom, is reported in Physical Review Letters and highlighted in the August 10th issue of APS's on-line journal Physics (physics.aps.org).Along with...
At a recent physics seminar at the Department of Energy's Fermi National Accelerator Laboratory, Fermilab physicist Pat Lukens of the CDF experiment announced the observation of a new particle, the Omega-sub-b (Ωb). The particle contains three quarks, two strange quarks and a bottom quark (s-s-b). It is an exotic relative of the much more common proton and has about six times the proton's mass.The observation of this "doubly strange" particle, predicted by the Standard Model, is...
University of Nevada, Reno team findings to be published in Physical Review Letters articleIn a forthcoming Physical Review Letters article, a group of physicists at the University of Nevada, Reno are reporting a refined analysis of experiments on violation of mirror symmetry in atoms that sets new constraints on a hypothesized particle, the extra Z-boson.Andrei Derevianko, an associate professor in the College of Science's Department of Physics, who has conducted groundbreaking research to...
The Large Hadron Collider is an enormous particle accelerator whose 17-mile tunnel straddles the borders of France and Switzerland. A group of physicists at the University of Nevada, Reno has analyzed data from the accelerator that could ultimately prove or disprove the possibility of a fifth force of nature.As the largest science instrument ever built, the LHC has the science community buzzing with excitement as it may help in understanding the inner workings of Nature.Remarkably, some of...
The U.S. Department of Energy's Fermi National Accelerator Laboratory announced on Friday that physicists have come closer to finding the elusive "God Particle," which could one day explain why particles have mass, the AFP reported.The American research institute had previously claimed it was moving ahead of its European rival in the race to discover one of the biggest prizes in physics, the elusive Higgs Boson particle.Fermilab reported that its researchers have managed to shrink...
The territory where the Higgs boson may be found continues to shrink. The latest analysis of data from the CDF and DZero collider experiments at the U.S. Department of Energy's Fermilab now excludes a significant fraction of the allowed Higgs mass range established by earlier measurements. Those experiments predict that the Higgs particle should have a mass between 114 and 185 GeV/c2. Now the CDF and DZero results carve out a section in the middle of this range and establish that it cannot...
World in brief STOCKHOLM The award of the 2008 Nobel Prize in physics to two Japanese scientists and a Japanese American for helping explain why the universe is asymmetrical, and thus fit for life, prompted an angry response from Italy's National Institute of Nuclear Physics yesterday. Half the 10m kroner (800,000) prize went to Yoichiro Nambu and the other to Makoto Kobayashi and Toshihide Maskawa of Japan for their discoveries in spontaneous broken symmetry in sub- atomic physics....
A new physics discovery explores why there is more matter than antimatter in the universe.The latest research findings, which involved significant contributions from physicists at the University of Melbourne, have been recently published in the prestigious journal Nature.The paper reveals that investigation into the process of B-meson decays has given insight into why there is more matter than antimatter in the universe."B-mesons are a new frontier of investigation for us and have proved very...
