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(PhysOrg.com) -- Results presented by the LHCb collaboration this evening at the annual ‘Rencontres de Moriond’ conference, held this year in La Thuile, Italy, have put one of the most stringent limits to date on the current theory of particle physics, the Standard Model. LHCb tests the Standard Model by measuring extremely rare processes, in this case a decay pattern predicted to happen just three times out of every billion decays of a particle known as the Bs (B-sub-s) meson.

(PhysOrg.com) -- The world’s most precise measurement of the mass of the W boson, one of nature’s elementary particles, has been achieved by scientists from the CDF and DZero collaborations at the Department of Energy’s Fermi National Accelerator Laboratory. The new measurement is an important, independent constraint of the mass of the theorized Higgs boson

(PhysOrg.com) -- The Standard Model of Physics suggests that shortly after the Big Bang there should have been the same amount of antimatter in existence as there was matter. As time passed, both should have decayed roughly equally, leaving roughly the same amounts of each today.

Your corporate attorney represents your company, not you. If you get in a spat with your partner, your board, or an investor, and the difference will become painfully clear.

(PhysOrg.com) -- Physicists know that neutrinos (and antineutrinos) come in three flavors: electron, muon, and tau. In several experiments, researchers have detected each of the neutrino flavors and even watched them “oscillate” back and forth between flavors. But starting in the early ‘90s, some experiments have also revealed a nagging anomaly: muon antineutrinos oscillate into electron antineutrinos at a 3% higher rate than predicted.

On March 12, 1948, at 9:14 p.m.

By Duncan Graham-Rowe of Nature magazine The first drug to show signs of not just halting multiple sclerosis (MS), but actually reversing the nerve damage caused by the condition, has taken a significant step towards clinical approval.

In this age of scientific armament, every new invention that bears at all upon the art of warfare is carefully weighed in. the balance of military usefulness.

Editor's note: This article was originally published in the September 1997 issue of Scientific American (a PDF version of the original is available for purchase below). We have resurfaced this article to commemorate the end of the Tevatron

The expression “beauty’s only skin-deep” has often been applied to the chemistry of materials because so much action takes place at the surface.

Last year 10 children died in California in the worst whooping cough outbreak to sweep the state since 1947. In the first six months of 2011, the Centers for Disease Control and Prevention recorded 10 measles outbreaks--the largest of which (21 cases) occurred in a Minnesota county, where many children were unvaccinated because of parental concerns about the safety of the standard MMR vaccine against measles, mumps and rubella. At least seven infants in the county who were too young to receive the MMR vaccine were infected.

From the desk of William J Curtis - Chief Executive Officer Robb Report MagazineFirstly, how dare these people at Standard & Poor's - an American company owned by McGraw-Hill - take the inappropriate, egotistical, and self-serving action of rating the United States of America’s credit as anything less than AAA? ...

From the desk of William J Curtis - Chief Executive Officer Robb Report MagazineFirstly, how dare these people at Standard & Poor's - an American company owned by McGraw-Hill - take the inappropriate, egotistical, and self-serving action of rating the United States of America’s credit as anything less than AAA?

By Zeeya Merali of Nature magazine A one-way system for light rays could allow optical computer chips to overtake their standard electronic counterparts. [More]

NEW YORK, July 29 (Reuters) - Ratings agency Standard &Poor's downgraded five catastrophe bonds on Friday, a consequence of changes that catastrophe modeling company RMS [More]