4 July 2012 (discovery announcement) / Europe
Experiments announce a new particle consistent with the Higgs
CERN’s ATLAS and CMS collaborations announced a new particle near 125 GeV, consistent with the long-sought Higgs boson.
The story
Two independent detector collaborations reported discovery-level signals on 4 July 2012. Spin, decays and interactions still needed further measurement; subsequent evidence strengthened its identification as a Higgs boson. Accelerators, detectors, data analysis and multinational teams produced the result. It was not an experiment performed by Higgs alone, nor proof that the Standard Model explained every phenomenon.
Connections and context
A decades-old theoretical proposal required complex instruments and statistical evidence. Discovery began a continuing precision-research program rather than ending the exchange between theory and experiment.
Dates and precision
4 July 2012 (discovery announcement) Documented date
Positioned by the documented year, month or day. Missing precision is not inferred.
Representative map location
CERN, near Geneva
The marker represents CERN near Geneva; the Large Hadron Collider ring crosses the Swiss–French border.
Representative coordinates · 46.233°, 6.055°
A marker identifies one representative place, such as a manuscript collection, laboratory or observing site. It does not mean the work happened only there, or assign a shared discovery to one country.
Bibliography
- CERN: discovery and identification of the Higgs boson
- CERN: How did we discover the Higgs boson?
- ATLAS: Latest results from the Higgs search, July 2012
- CMS: Observation of a new particle with a mass of 125 GeV
References are listed as plain bibliography titles. They support particular facts or context; a reference does not certify every interpretation in a story.