L'ESPERIMENTO LHCb A LHC
LHCb is an experiment at the CERN LHC collider which is used to investigate the decays of B-particles (particles containing b-quarks) and so provide an insight on the phenomenon of CP-violation.
The collaboration is composed by about 600 physicists and engineers from more than 40 institutes from all over the world.
One of the outstanding puzzles in particle physics and cosmology is the dominance of matter over antimatter in the universe. In the Big Bang matter and antimatter have been produced in equal amounts. However, a tiny difference in the laws of nature resulted in the matter-dominated universe we know today.
The phenomenon that distinguishes matter from antimatter is called CP violation and, although it's now well established, its origin remains one of the most important problems in particle physics.
We are involved in a research program in which we investigate the properties of B-particles, how they can be used to measure the CP-violation parameters and how to exploit the design of the LHCb detector to improve these measurements.
In our work we collaborate with other italian universities and with CERN to build the Ring Imaging Cherenkov (RICH) detectors for LHCb. These detectors allow us to distinguish between different types of particles produced in high energy proton-proton collisions. We do this exploiting the Cherenkov effect in which photons (that is light) are emitted by charged particles when their speed exceeds the speed of light in the medium. Photons from this very weak source are detected by the systems which we have helped to design and build.