What is Lhcb: Definition and 17 Discussions

The LHCb (Large Hadron Collider beauty) experiment is one of eight particle physics detector experiments collecting data at the Large Hadron Collider at CERN. LHCb is a specialized b-physics experiment, designed primarily to measure the parameters of CP violation in the interactions of b-hadrons (heavy particles containing a bottom quark). Such studies can help to explain the matter-antimatter asymmetry of the Universe. The detector is also able to perform measurements of production cross sections, exotic hadron spectroscopy, charm physics and electroweak physics in the forward region. The LHCb collaboration, who built, operate and analyse data from the experiment, is composed of approximately 1260 people from 74 scientific institutes, representing 16 countries. Chris Parkes succeeded on July 1, 2020 as spokesperson for the collaboration to Giovanni Passaleva (spokesperson 2017-2020). The experiment is located at point 8 on the LHC tunnel close to Ferney-Voltaire, France just over the border from Geneva. The (small) MoEDAL experiment shares the same cavern.

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  1. malawi_glenn

    I LHCb discovers three new exotic particles

    I thought pentaquarks were already considered discovered? https://phys.org/news/2022-07-lhcb-exotic-particles-pentaquark-first-ever.html
  2. ohwilleke

    I New Naming Rules for Exotic Hadrons at the LHC: LHCb Collaboration Paper (2022)

    The LHCb collaboration at the Large Hadron Collider has developed a new set of rules for naming composite particles bound by the strong force (i.e. hadrons) that are contemplated by existing rules for naming them. This has significant practical relevance to anyone dealing with high energy hadron...
  3. V

    B LHCb results and MicroBooNE results

    I'm curious to what folks thoughts are on the LHCb muon / electron decay ratio results are, as well as the MicroBooNE (null) results. Do the LHCb results really require a new force as the media seems to report? Do the MicroBooNE results indicate that a sterile heavy neutrino is dead?
  4. ohwilleke

    I New Lepton Universality Data To Be Announced Tuesday, 18 October 2021

    One of the Standard Model's rules is that charged leptons (i.e. the electron, muon and tau lepton) are identical to each other in their properties except for their masses (and that their anti-particles are identical to them except for a charge-parity flip). But, in two kinds of rare...
  5. Wrichik Basu

    A LHCb discovers a new tetraquark state

    In a recent paper submitted by the LHCb collaboration at arXiv, they have reported a tetraquark state composed of charm quarks and antiquarks. The statistical significance of the data is more than 5σ. The abstract: An article on this paper...
  6. F

    I Estimating decay yields from fits to these distributions

    I'm currently reading various papers on the violation of Lepton Flavour Universality in rare B-decays and I would appreciate some help in understanding the methodology for measuring the ratios in these decays. Here is a quote from a recent paper from the LHCb collaboration (p.5): My question...
  7. Amrator

    I LHCb Discovers Two New Particles

    https://home.cern/about/updates/2018/09/lhcb-experiment-discovers-two-perhaps-three-new-particles http://lhcb-public.web.cern.ch/lhcb-public/Welcome.html#LHCCCKM This is very exciting news! What exactly does it say about the strong interaction?
  8. Greg Bernhardt

    Insights Interview with Niels Tuning, LHCb Run Coordinator - Comments

    Greg Bernhardt submitted a new PF Insights post Interview with Niels Tuning, LHCb Run Coordinator Continue reading the Original PF Insights Post.
  9. It's me

    I How can I access event data for LHCb calorimeters?

    I want to do a project using machine learning on the calorimeter event data of the LHCb. How can I access this data? Is it very difficult to navigate your way through the source code on your own?
  10. mfb

    I B -> s µµ decays: Current status

    Something curious is going on with these decays. LHCb gives a seminar talk Tuesday next week, a livestream will be available. Edit: See results discussed starting here I'll summarize the current status here. I tried to keep most at the advanced (I)-level, but I don't think that always worked...
  11. mfb

    I LHCb observes 5 new particles (excited hadrons)

    Plain old standard model baryons, but 5 at the same time, and with crystal clear peaks in the decay to ##\Xi_c^+ K^-##. Each peak in the figure is a particle never seen before, and the significances of those peaks are about 20 sigma (10 sigma for the 5th one). A broad 6th state might hide around...
  12. LHCb - The Beauty Experiment

    LHCb - The Beauty Experiment

    A short documentary on the LHCb experiment at CERN, on the quest for the mystery of Antimatter.
  13. ChrisVer

    LHCb results show generation non-Universality (non-SM)

    This article suggests something was found and that today we will be able to find the paper online. http://www.eurekalert.org/pub_releases/2015-08/uom-ess082615.php I am eager to see what the found and at what significance...asking for extra experiments means that the significance they got was...
  14. mfb

    What is the significance of the newly discovered pentaquark at LHCb?

    Pentaquark are particles made out of 4 quarks and 1 antiquark, unlike mesons (quark+antiquark) and baryons (3 quarks). This is by far not the first claim of a pentaquark discovery, but I think it is the most convincing one so far. We'll see which alternative interpretations will come up in the...
  15. mfb

    Deviation from Standard Model observed at LHCb (B->K* mu mu)

    As usual, the interpretation is still unclear, but I think it is an interesting effect. LHCb studied the angular distributions in the decay ##B^0 \to K* \mu \mu## and presented the result at EPS2013. In one variable (called P'5) in two bins, a large deviation was found (3.7 sigma in one bin)...
  16. TrickyDicky

    CP violation and new SM discrepancy at the LHCb

    While we still have no news from Higgs a new discrepancy with the standard model has been spotted by the LHCb experiment: http://profmattstrassler.com/2011/11/16/a-notable-discrepancy-at-the-lhcb-experiment/ I bet next month we'll find Higgs and this discrepancies will go away!
  17. T

    How Are B-Bbar Pairs Produced at the LHCb?

    I'm giving a report on the LHCb for a detector physics class. I don't quite understand how b-bbar-pairs are produced at the LHCb. LHCb collides two symmetric proton beams and is supposed to work as a b factory. In many papers concerning the LHCb, for instance...