Thursday, March 19, 2015

The Higgs boson

The Higgs boson

On 4 July 2012, the ATLAS and CMS experiments at CERN's Large Hadron Collider announced they had each observed a new particle in the mass region around 126 GeV. This particle is consistent with the Higgs boson predicted by the Standard Model. The Higgs boson, as proposed within the Standard Model, is the simplest manifestation of the Brout-Englert-Higgs mechanism. Other types of Higgs bosons are predicted by other theories that go beyond the Standard Model.
On 8 October 2013 the Nobel prize in physics (link is external) was awarded jointly to François Englert and Peter Higgs "for the theoretical discovery of a mechanism that contributes to our understanding of the origin of mass of subatomic particles, and which recently was confirmed through the discovery of the predicted fundamental particle, by the ATLAS and CMS experiments at CERN's Large Hadron Collider."
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Featured updates on this topic

17 Mar 2015 – Today the ATLAS and CMS experiments presented for the first time a combination of their results on the mass of the Higgs boson
27 Jan 2015 – Recent publications from CMS use data from the LHC's first run to shed light on the properties of the Higgs boson
8 Oct 2013 – The 2013 Nobel prize in physics has been awarded to François Englert and Peter Higgs for their theoretical work on the Higgs boson

Updates

12 Nov 2014 – Without a doubt, it is a Higgs boson, but is it the Higgs boson of the Standard Model? Run 2 of the LHC find out, says theorist John Ellis
26 Sep 2014 – In CERN’s 60th year, the first proof of the existence of the Higgs boson earns a Guinness World Record for CERN, ATLAS and CMS
7 Jul 2014 – At ICHEP in Valencia, Spain, all four LHC experiments presented new results from the LHC’s first run. Run 2 physics holds much promise
23 Jun 2014 – Results reported by ATLAS and CMS discuss the decay of Higgs bosons directly to fermions, the particles that make up matter
19 May 2014 – Teach the machines: CERN launches competition to develop machine-learning analysis techniques for Higgs data
31 Mar 2014 – At the Moriond conference CMS presented the best constraint yet of the Higgs boson “width”, a parameter that determines the particle’s lifetime
10 Mar 2014 – On his first trip to CERN since sharing the Nobel prize in physics last year with Peter Higgs, François Englert talks Higgs bosons and supersymmetry
26 Feb 2014 – Watch François Englert explain the equations for the Brout-Englert-Higgs mechanism that gives particles mass, with the help of a blackboard
19 Dec 2013 – Higgs boson decays, a Nobel prize for Higgs and Englert and a huge Open Days event were among the big stories at CERN this year
3 Dec 2013 – The CMS collaboration have measured the decay of the Higgs boson to pairs of bottom quarks and to pairs of tau leptons

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