Und damit blieb letztlich auch unklar, wie die Teilchen des Standardmodells eigentlich zu ihrer Masse kommen. Und auch in den er-Jahren — als das Standardmodell noch gar nicht wirklich entwickelt wurde — stellte man sich die Frage, warum Protonen und Neutronen eine Masse besitzen und wie diese in die Theorie eingeht. An diesen Punkten haben sehr viele Leute gearbeitet. Denn innerhalb dieser elementaren Teilchen findet keine Wechselwirkung mehr zwischen verschiedenen Partnern statt. Gemein ist ihnen eine bizarre Idee: Elementarteilchen besitzen die Eigenschaft Masse eigentlich gar nicht.

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Real CMS proton-proton collision events in which 4 high energy muons red lines are observed. The event shows characteristics expected from the decay of a Higgs boson but is also consistent with background Standard Model physics processes.

Image: CERN The Higgs boson Elementary particles gain their mass from a fundamental field associated with the Higgs boson The Brout-Englert-Higgs mechanism In the s, physicists realised that there are very close ties between two of the four fundamental forces — the weak force and the electromagnetic force.

The two forces can be described within the same theory, which forms the basis of the Standard Model. The basic equations of the unified theory correctly describe the electroweak force and its associated force-carrying particles, namely the photon, and the W and Z bosons, except for a major glitch.

All of these particles emerge without a mass. While this is true for the photon, we know that the W and Z have mass, nearly times that of a proton. The more a particle interacts with this field, the heavier it is. Particles like the photon that do not interact with it are left with no mass at all. Like all fundamental fields, the Higgs field has an associated particle — the Higgs boson.

The Higgs boson is the visible manifestation of the Higgs field, rather like a wave at the surface of the sea. The top event in the CMS experiment shows a decay into two photons dashed yellow lines and green towers. This particle is consistent with the Higgs boson but it will take further work to determine whether or not it is 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. Latest Related News.



Having been asked to fund UK participation in the physics programme of the Large Hadron Collider LHC at CERN, Mr Waldegrave offered a bottle of vintage champagne to anyone who could send him a valid description of the Higgs boson, which was understandable to a lay-person, in a piece of text which fitted on one side of a sheet of A4 paper. Four submissions were judged to have satisfied the challenge. The text below is one of them. The champagne was drunk long ago.


Der Higgs-Mechanismus – von einer Idee zum Nobelpreis


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