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Happy birthday, dear boson!

11 Jul 2014, 07:56 UTC
Happy birthday, dear boson!
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Singing happy birthday slightly off-key but in good spirit. This is how several hundred physicists gathered for the 37th International Conference on High Energy Physics in Valencia, Spain closed the day on July 4th. Two years before, the CMS and ATLAS experiments had announced the discovery of the Higgs boson on the eve of the same conference that was then held in Melbourne, Australia. Lots of people reminisced about the day of the announcement, where they were when they heard the news since many were traveling.
Two years later, the two experiments have now gathered an impressive amount of knowledge on the Higgs boson. Both groups have measured with high precision the Higgs boson mass, how it is produced and how it decays. ATLAS presented its published Higgs boson mass combination, namely 125.36 ± 0.41 GeV also in perfect agreement with the CMS measurement, presented for the first time at this conference, of 125.03 ± 0.30 GeV.
By presenting its final Higgs boson decay to two photons results, the CMS Collaboration has now completed its analysis of all the data taken so far. The obtained value for the combined signal strength, which is how many Higgs bosons are observed compared ...

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