Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

Rotating Weyssenhoff fluids in linearized Einstein-Cartan theory

The Weyssenhoff fluid expands the ordinary perfect-fluid description of general relativity by taking into account the intrinsic spin of its constituent particles. Within the linearized regime of Einstein-Cartan theory, we investigate the exterior geometry produced by isolated slo...

Meta-Geometric Genesis of Spacetime from Spontaneously Broken Gauge Symmetry

We present a pre-geometric gauge theory in which spacetime geometry and gravity emerge from spontaneous symmetry breaking and a concurrent topological phase transition. The theory is formulated on a four-dimensional manifold without presupposed metric structure, with general cova...

Exploring baryon semileptonic decays through polarization and entanglement

Abstract The unitarity of the Cabibbo–Kobayashi–Maskawa (CKM) matrix is a cornerstone of the standard model (SM). Precise tests of this unitarity require independent determinations of its elements, such as | V us |, which governs the transition between strange and up quarks. Curr...

Review of Particle Physics *

The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,200 new measurements from 903 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and b...