LHCb experiment

LHCb is an experiment set up to explore what happened after the Big Bang that allowed matter to survive and build the Universe we inhabit today

Fourteen billion years ago, the Universe began with a bang. Crammed within an infinitely small space, energy coalesced to form equal quantities of matter and antimatter. But as the Universe cooled and expanded, its composition changed. Just one second after the Big Bang, antimatter had all but disappeared, leaving matter to form everything that we see around us — from the stars and galaxies, to the Earth and all life that it supports.


  • LHCb measurements help to understand possible signatures of dark matter presence in the Universe

    Today, at the Quark Matter conference at Kraków, Poland, the LHCb Collaboration presented results of an analysis which may have significant consequences for the search for “dark matter” in the Universe. These results have been also presented recently at the Rencontres de Moriond QCD at La Thuile, Italy. The measurement is of antiproton production in […]

  • Magic beauty charmless decays

    The largest CP violation ever observed. Today, at the Rencontres de Moriond EW, and on Tuesday, during a CERN seminar, the LHCb Collaboration reported the results of measurements of CP asymmetry in the charged charmless B meson decays into three light mesons. In these decays the b-quark is transformed into a u,d or s-quark instead […]

  • High precision measurement of the charm oscillation parameter yCP – yCPKπ using decays of D0 mesons to two light mesons

    yCP – yCPKπ = (6.96±0.26±0.13)x10-3 Today, the LHCb Collaboration submitted for publication a paper that reports the results of the high precision measurement of the charm oscillation (mixing) parameter yCP – yCPKπ using two body D0 meson decays. The result is more precise than the current world average value by a factor of four. The […]

  • Installation of the VELO

    One half of the Vertex Locator (VELO) has landed at the LHCb experiment hall. The VELO detector will be located very tightly around the collision point. As the name suggests, we use it to determine the exact collision point.

  • Installation of SciFi

    Yesterday two frames of the scintillating fibre tracker (SciFi) were installed in the detector. They are placed on the other side of the magnet. Together with the VeLo, they will measure the curvature of charged particles and thus their momentum.

  • New tests of lepton universality with τ leptons

    Today at the 30th International Symposium on Lepton Photon Interactions at High Energies, organized by the University of Manchester, the LHCb Collaboration presented new tests of lepton universality, one of the basic principles of the Standard Model (SM) of particle physics. This principle states that the SM treats the three charged leptons (electrons, muons and […]