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The likelihood with which this happens depends on a variety of factors including: the difference in mass, the strength of the interactions, etc. Most of these factors are fixed by the Standard Model, except for the mass of the Higgs boson itself. For a Higgs boson with a mass of 125 GeV/c 2 the SM predicts a mean life time of about 1.6 × 10 ...
In the Standard Model of particle physics, the Higgs mechanism is essential to explain the generation mechanism of the property "mass" for gauge bosons.Without the Higgs mechanism, all bosons (one of the two classes of particles, the other being fermions) would be considered massless, but measurements show that the W +, W −, and Z 0 bosons actually have relatively large masses of around 80 ...
Standard Model of Particle Physics. The diagram shows the elementary particles of the Standard Model (the Higgs boson, the three generations of quarks and leptons, and the gauge bosons), including their names, masses, spins, charges, chiralities, and interactions with the strong, weak and electromagnetic forces.
In May 2024, the Particle Data Group estimated the World Average mass for the W boson to be 80369.2 ± 13.3 MeV, based on experiments to date. [11] As of 2021, experimental measurements of the W boson mass had been similarly assessed to converge around 80 379 ± 12 MeV, [12] all consistent with one another and with the Standard Model.
The Higgs mechanism occurs whenever a charged field has a vacuum expectation value. This effect occurs because scalar field components of the Higgs field are "absorbed" by the massive bosons as degrees of freedom, and couple to the fermions via Yukawa coupling, thereby producing the expected mass terms.
The search for the Higgs boson was a 40-year effort by physicists to prove the existence or non-existence of the Higgs boson, first theorised in the 1960s.The Higgs boson was the last unobserved fundamental particle in the Standard Model of particle physics, and its discovery was described as being the "ultimate verification" of the Standard Model. [1]
The Society awarded the prize "to Guido Tonelli for the discovery, with the CMS experiment, of a new fundamental particle with mass around 125 GeV and properties consistent with a Higgs boson, theoretically predicted almost 50 years ago, the existence of which ensures a huge insight in the understanding of the Standard Model of particle physics".
On 4 July 2012, the two main experiments at the Large Hadron Collider (ATLAS and CMS) at CERN confirmed independently the existence of a previously unknown particle with a mass of about 125 GeV/c 2 (about 133 proton masses, on the order of 10 −25 kg), which is "consistent with the Higgs boson" and widely believed to be the Higgs boson. [11]