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We show that several features (the three-dimensional XY universality for moderate underdoping, the almost-BCS behaviour for moderate overdoping and the critical exponent) of the superfluid density in hole-doped cuprates hint at a composite structure of the holes. This idea can be implemented in a spin-charge gauge approach to the t − t′ − J model and provides indeed good agreement with available experimental...
In this article, after a short introduction, grand unified SU(5)×SU(5)′ model augmented by D2 parity has been discussed. The latter turns out to be important for phenomenology. Specific pattern of the GUT symmetry breaking causes new strong dynamics at low energies. Consequently, the Standard Model leptons, along with right-handed /sterile neutrinos, come out as composite...
A search for excited leptons, carried out with the CMS detector in pp collision at the LHC with TeV, is presented. The search has been performed for an associated production of a lepton and an oppositely charged excited lepton pp →ll*, followed by the decay l*→lγ, resulting in llγ final state, where l = e,μ. No excess above the Standard Model expectation is observed in the data...
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