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.


  • Celebrating LHCb’s 600th publication

    The LHCb collaboration has submitted its 600th publication! The first LHCb paper was submitted in August 2010, and since then 50 to 70 papers were submitted per year, about one every week. The 500th paper was submitted two years ago. All LHCb papers are accessible on the arXiv and are published Open Access. The image […]

  • Successful beam pipe installation at LHCb

    For detailled informations, see the bulletin article

  • New tests of lepton universality show the same pattern as deviations seen in previous results

    Test of lepton universality using B0→KS0l+l– and B+→K*+l+l– decays. Today at the CERN seminar and at the Rencontres de Blois 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 […]

  • The first LHCb measurement of the W boson mass

    [ mW=80354±23stat±10expsys±17theory±9PDF MeV] Last week the LHCb Collaboration submitted for publication a paper that reports the first LHCb measurement of the W boson mass with an uncertainty of 32 MeV using the 2016 data set. A more precise measurement with a total uncertainty of ≲ 20 MeV looks achievable with already existing LHCb data. One […]

  • Observation of an exceptionally charming tetraquark.

    This week at the European Physical Society conference on high energy physics, EPS-HEP 2021 the LHCb Collaboration presented the first observation of a doubly charmed tetraquark, Tcc+, with a new quark content ccud. The newly discovered particle containing two heavy charm quarks is manifestly exotic, i.e. beyond the conventional pattern of hadron formation found in […]

  • The charm of a proton

    Today at the European Physical Society conference on high energy physics, EPS-HEP 2021 the LHCb Collaboration presented results of a measurement consistent with the presence of valence-like charm content in the proton, referred to as intrinsic charm. In order to obtain this result LHCb physicists measured the fraction of proton-proton collisions with a Z boson […]