Soy algo escéptico al tema de la existencia del bosón de Higgs (ver El campo de Higgs). O por lo menos, levanto la mano y digo: todo esto se basa en llenar de "forma bella" un agujero que tiene el modelo estándar. No hay experimento que muestre a esta partícula, aunque hubo cierta agitación en el LHC a fines del año pasado. Tengo más enlaces sobre el tema, ésta es solo la primera tanda. Son tiempos interesantes para la física de altas energías.
The Higgs boson is a hypothetical massive elementary particle that is predicted to exist by the Standard Model (SM) of particle physics. The Higgs field is a hypothetical, ubiquitous quantum field supposedly responsible for giving particles their masses. All quantum fields have a fundamental particle associated with them, and the Higgs boson is associated with the Higgs field.
The existence of the Higgs boson is predicted by the Standard Model to explain how spontaneous breaking of electroweak symmetry (theHiggs mechanism) takes place in nature, which in turn explains why other elementary particles have mass.[Note 1] Its discovery would further validate the Standard Model as essentially correct, as it is the only elementary particle predicted by the Standard Model that has not yet been observed in particle physics experiments. If shown to exist, it is expected to be a scalar boson. (Bosons are particles with integerspin, and scalar bosons have spin 0.) Alternative sources of the Higgs mechanism that do not need the Higgs boson are also possible and would be considered if the existence of the Higgs boson were ruled out. They are known as Higgsless models.
Experiments to find out whether or not the Higgs boson exists are currently being performed using the Large Hadron Collider (LHC) at CERN, and were performed at Fermilab's Tevatron until its closure in late 2011. Some theories suggest that any mechanism capable of generating the masses of elementary particles must become visible at energies above 1.4 TeV; therefore, the LHC (colliding two 3.5 TeV beams) is expected to be able to answer the question whether or not it actually exists. In December 2011, the two main experiments at the LHC (ATLAS and CMS) both reported independently that their data hints at a possibility the Higgs may exist with a mass around 125 GeV/c2(about 133 proton masses, on the order of 10−25 kg). It is also believed that the original range under investigation has been narrowed down considerably and that a mass outside approximately 115–130 GeV/c2 is very likely to be ruled out. No conclusive answer yet exists, although it is expected that the LHC will provide sufficient data by the end of 2012 for a definite answer.
In the popular media, the particle is sometimes referred to as the God particle, a title generally disliked by the scientific community as a media hyperbole that misleads readers.
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