The mass of a top

摘要

Writing in Physical Review Letters, researchers working in the D0 experiment (Abazov et al.) at the Tevatron accelerator at Fermilab near Chicago, Illinois, report the most precise single measurement so far of the mass of the heaviest-known elementary particle, the top quark. The result concludes an exciting 20-year saga -from the joint discovery of the top quark by the DO Collaboration and its competitor the CDF Collaboration, to a measurement of the top quarks mass with a precision better than 0.5%. A similar result from the CDF experiment is to be expected, updating their 2012 result.