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.


  • The first evidence for CP violation in a specific charm hadron decay

    The International Conference on High Energy Physics, ICHEP 2022, ended today in Bologna (Italy). At this conference, the LHCb collaboration reported a new measurement of the CP-violating asymmetry, ACP, in the decay of neutral charmed mesons, the D0, into a pair of charged kaons, D0→K–K+. This result followed the exciting result of March 2019, in […]

  • First collisions at the world-record energy for a brand-new LHCb detector

    Start of LHC Run 3. Today, at 16:47, protons collided again at LHCb after a 3.5 year break known as Long Shutdown 2 (LS2). During this period the original LHCb experiment has been largely dismantled and an almost completely new detector has been constructed. At the same time improvements of the LHC collider allowed it […]

  • Observation of a strange pentaquark, a doubly charged tetraquark and its neutral partner.

    Today, at the CERN seminar, the LHCb Collaboration reported the observation of a strange pentaquark, a doubly charged tetraquark and its neutral partner. These results will also be presented at the ICHEP 2022 International Conference on High Energy Physics in Bologna, Italy, starting tomorrow. The pentaquark, PΛψs(4338)0, is observed with high significance in the J/ψΛ […]

  • Measurement of the CKM angle γ

    The largest CP violation ever observed. This week, at the 10th Annual Large Hadron Collider Physics Conference, LHCP2022, LHCb presented results of the determination of the Cabibbo–Kobayashi–Maskawa (CKM) angle γ from the study of the CP-violating observables in beauty particle decays B±→DK± and B±→Dπ±. The particular charmed D meson decays into four charged mesons K∓π±π±π∓ […]

  • 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 […]