mercoledì 10 agosto 2011

ATLAS and the "God particle"

Particle postulated by the Scottish theoretical physicist PW Higgs, a professor at the University of Edinburgh, who developed the field theory which takes its name (Higgs field) whose carrier particle, actively pursued at the CERN laboratories in Geneva Atlas experiment is called precisely, particle or "Higgs boson". With this fundamental particle the particles originally all with zero mass, each one would buy their mass. The Higg’s boson would mathematical coherence to the Standard Model, the theory that describes fundamental particles and forces through which they interact. At the origin of the Higgs theory is the finding that the particles possess a very wide variety of masses, from the smallest (the mass of the electron) to the largest, the mass of quark top (approximately 200,000 times that of electron). The values ​​of different masses do not seem to have a relationship with each other, not only that, but the simplest version of the Standard Model requires that all particles have mass equal to zero. The Higgs field was introduced to reconcile these two requirements. Higgs proposed that all space-time is permeated by a field, the Higgs field, in some ways similar to an electromagnetic field. When the particles move through space-time also moves in the Higgs field, and interacting with it, acquire a mass. More great is the interaction of particles with the field, more mass gained is great. This interaction can be considered similar to the action of viscous forces acting on particles moving in a dense liquid. Greater the interaction with the liquid, more great its mass appears to be, since the mass can also be seen as resistance to changes in motion. Moving in the Higgs field particles acquire their mass inertia. This field is a constant value, even in a vacuum, and a scalar (non-vector, which is determined only by a numerical value and not from one direction). Since quantum theory follows that each field has a particle associated with it, a boson (like the photon for the electromagnetic field), the field requires the existence of the Higgs particle or Higgs boson. Even this would be scalar that is with zero spin. In this field, photons, massless, which are the mediators of electromagnetism, would travel in the direction of the field (the term "direction" hasn’t the physical meaning of our three-dimensional space, but it is an internal property of the field) and therefore would not acquire mass and observed by us, just as photons. The same particles, when they move in the opposite direction, they need more energy (mass), which is absorbed by the Higgs field, then become W and Z bosons, mediators of the weak nuclear force. This view allows us to unify also this aspect of electromagnetism and the weak nuclear force into the electroweak theory, explaining the current diversity of their brokers, who are thus two sides of the same particle, which we see as photons or W and Z depending on their interaction with the Higgs field. Each type of particle decays into electrons, photons, muons, hadrons, neutrinos, or their antiparticles. ATLAS tries to detect these stable particles (the "decay products"), then go back to the initial particle decayed after a certain period of time. The Higgs boson may decay into a variety of ways depending on its mass, which is an unknown theory. The Higgs field, however, must assume a uniform background value of zero and not even in a vacuum.
But what if the God particle would not be detected? Higg's intuition would be wrong?
Marius, who is the ideator of the gravitational theory exposed in this blog, does not think so, instead believes that Higgs field has more probabilities to be observed by Atlas detectors. However, the "mechanism" would be a bit different. The current vision that provides for trasmitting fundamental forces by the exchange of bosons between elementary particles (which, intuitively, could give rise only to repulsive actions, if only for the principle of conservation of motion) would be replaced by action and counter-thrust generated by a "physical" oscillating mass/energy field of which the same elementary particles are "disturbance" in its turn made up by waves with lower lenght wave. But what could be for ATLAS the "calling card" of this kind of field? For example, a less extensive scattering of data collection to allow
linear interpolation more or less "homogeneous" on the various ranges of mass/energy. And the mediators of the quantum forces ? Well, to put it as Franco Selleri says: "unlikely mathematical models exatly corresponds to reality of physical phenomena describing."

Stefano Gusman

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