The first results on supersymmetry from the Large Hadron Collider (LHC) have been analysed by physicists and some are suggesting that the theory may be in trouble. Data from proton collisions in both the Compact Muon Solenoid (CMS) and ATLAS experiments have shown no evidence for supersymmetric particles – or sparticles – that are predicted by this extension to the Standard Model of particle physics.
Supersymmetry (or SUSY) is an attractive concept because it offers a solution to the "hierarchy problem" of particle physics, provides a way of unifying the strong and electroweak forces, and even contains a dark-matter particle. An important result of the theory is that every known particle has at least one superpartner particle – or "sparticle". The familiar neutrino, for example, is partnered with the yet-to-be discovered sneutrino. These sparticles are expected to have masses of about one teraelectronvolt (TeV), which means that they should be created in the LHC.
In January the CMS collaboration reported its search for the superpartners of quarks and gluons, called squarks and gluinos, in the detector. If these heavy sparticles are produced in the proton–proton collisions, they are expected to decay to quarks and gluons as well as a relatively light, stable neutralino.
fonte
Nenhum comentário:
Postar um comentário