Pair creation constrains superluminal neutrino propagation.

The OPERA collaboration claims that muon neutrinos with a mean energy of 17.5 GeV travel 730 km from CERN to the Gran Sasso at a speed exceeding that of light by about 7.5 km/s or 25 ppm.

Very special relativity.

By very special relativity (VSR) we mean descriptions of nature whose space-time symmetries are certain proper subgroups of the Poincaré group. These subgroups contain space-time translations together with at least a two-parameter subgroup of the Lorentz group isomorphic to that generated by K(x) + J(y) and K(y)- J(x). We find that VSR implies special relativity (SR) in the context of local quantum field theory or of conservation.

A formal, standardized and evidence-based approach to Chest Pain Center development and process improvement: the Society of Chest Pain Centers and Providers accreditation process.

The notion of a Chest Pain Center has continued to develop over the past twenty years. The designation of "Chest Pain Center" now applies to the entire facility, much the same as that of "Trauma Center." The Chest Pain Center model incorporates both operational and clinical considerations required to develop proper Acute Coronary Syndrome (ACS) care in the context of a complex health-care system.