CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins85% CONFIDENCEOverall confidence: 85%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
Happened as dated, per interestingengineering.com[1]: "…HCb) collaboration at CERN, Switzerland announced their observation of a new particle with two charm…"For many years, physicists have been aware of the existence of this doubly charmed particle because of current physical theories. However, nobody has been successful in observing the particle and it is only now that the baryon with two heavy quarks has been distinctively detected. Known as Ξcc++(Xicc++), this new particle is almost four times heavier than a proton.
1.00
