3/14/2024 0 Comments Neutrinos plus![]() ![]() Celui-ci est la théorie qui décrit les particules et leurs interactions fondamentales. Further studies should be able to put tighter limits on the mass of heavy Majorana neutrinos in the hope of finding them – if, indeed, they exist. Quest-ce que le neutrino Le neutrino est une particule élémentaire décrit dans le modèle standard de la physique des particules. In addition, they explored for the first time the hypothesis that the Majorana neutrino is heavier than the right-handed W boson, placing a lower limit of 1.5 TeV on the mass of Majorana neutrinos. They excluded heavy Majorana neutrino masses up to about 3 TeV, for a right-handed W boson with a mass of 4.3 TeV. However, the researchers were able to use their observations to exclude possible masses for these two particles. They found no significant excess of events over the Standard Model expectation, indicating that no right-handed W bosons and heavy Majorana neutrinos took part in these collisions. The researchers compared the observed number of such events with the number predicted by the Standard Model. They used LHC data from collision events that produce two “jets” of particles plus a pair of energetic electrons or a pair of their heavier cousins, muons. In a new paper, the ATLAS collaboration describes the results of its latest search for hints of these particles.ĪTLAS looked for instances in which both a heavy Majorana neutrino and a “right-handed” W boson, another hypothetical particle, could appear. In an extended form of the seesaw model, these heavy Majorana neutrinos could potentially be light enough to be detected in LHC data. Neutrino+ est une application de promotion Instagram qui vous aide à obtenir gratuitement des likes, des abonnés, des commentaires et des vues Instagram. Finding heavy Majorana neutrinos could not only help explain neutrino mass, it could also lead to a better understanding of why matter is much more abundant in the universe than antimatter. But neutrinos have no electric charge, opening up the possibility that they could be their own antiparticles. So, for example, an electron has a negative electric charge and its antiparticle, the positron, is positive. But for this mechanism to work, both neutrinos need to be “Majorana” particles: particles that are indistinguishable from their antimatter counterparts.Īntimatter particles have the same mass as their corresponding matter particles but have the opposite electric charge. Sources of high-energy astrophysical neutrinos. The heavier neutrino plays the part of a larger child on a seesaw, lifting the lighter neutrino to give it a small mass. This mechanism involves pairing up the known light neutrinos with hypothetical heavy neutrinos. One way to explain neutrinos’ extreme lightness is the so-called seesaw mechanism, a popular extension of the Standard Model of particle physics. But what if their lightness could be explained by a mechanism that needs neutrinos to be their own antiparticles? The ATLAS collaboration at CERN is looking into this, using data from high-energy proton collisions collected at the Large Hadron Collider (LHC). Neutrinos weigh almost nothing: you need at least 250 000 of them to outweigh a single electron. ![]()
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