Tag: News
-
gamma
[ γ = (71.1+16.6-15.7)° only B±→DK decays ] [ γ = 85.1° uncertainty regions [61.8,67.8]° and [77.9,92.4]°, B±→DK and B±→Dπ decays ] 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. Therefore LHCb physicists are measuring differences between
-
3body_2
[ ACP(B±→π±π+π–) = +0.120 ± 0.020 ± 0.019 ± 0.007 ] [ ACP(B±→π±K+K–) = -0.153 ± 0.046 ± 0.019 ± 0.007 ] Earlier this year, LHCb physicists reported at the ICHEP2012 Conference (see 7 July 2012 (2) news) the first evidence of inclusive CP asymmetry (differences between properties of matter and antimatter) in the charmless
-
KsMuMu
[ Branching ratio K0S →μμ < 9×10-9 at 90% CL ] Having previously set the world’s most restrictive limits on the dimuon decays of D0, B0 and B0s mesons, LHCb physicists have turned their attention to the search for similar decays of another member of the particle zoo, the K0S meson. Using the 2011 data
-
pAtest
During the night, at 1:30 am, LHCb recorded the first proton-lead ion collisions at the LHC. The proton-lead physics data taking is planned to take place in January and February 2013. Today the LHC operational team made tests of collisions in order to prepare the set-up of the LHC collider and the LHC experiments for
-
Movie
“LHCb – A Beauty Experiment”, a short documentary on LHCb, has been shortlisted by the European Science TV and New Media Festival 2012. The festival takes place in association with the ESOF 2012 Science Congress in Dublin at Trinity College on 13-15th July 2012. The goal of the festival is to help writers to develop
-
asl
[ assl = (-0.24 ± 0.54 ± 0.33)% ] Physicists from the LHCb experiment have today released results that help to shed light on one of the most significant experimental discrepancies with the Standard Model of particle physics. In 2010, and with an update in 2011, the D0 experiment, analyzing data taken at the proton-antiproton
-
3body
[ ACP(B±→K±π+π–) = +0.034 ± 0.009 ± 0.004 ± 0.007 ] [ ACP(B±→K±K+K–) = -0.046 ± 0.009 ± 0.005 ± 0.007 ] LHCb physicists have presented today at the ICHEP2012 Conference in Melbourne measurements of differences between properties of matter and antimatter (CP violation asymmetry) in the charmless three-body B meson decays B±→K±π+π– and B±→K±K+K–.
-
NewPar
The quark model, independently proposed by physicists Murray Gell-Mann and George Zweig in 1964 to classify the strongly interacting particles called hadrons, is very successful. In this model baryons are composed of three quarks and mesons are composed of quark-antiquark pairs. The simplest baryon, the proton, which is the nucleus of the hydrogen atom, is
-
RarestDecay
The LHCb collaboration has made the first observation of the decay B+ → π+μ+μ–. With a branching ratio of about 2 per 100 million decays, this is the rarest decay of a B hadron ever observed, see CERN Courier article. click the image for higher resolution The image shows the invariant-mass distribution of selected π+μ+μ–
-
EW
Measurements of the production of W and Z bosons, see 10 June and 22 July 2010 news, allowed LHCb physicists to explore electroweak physics, see CERN Courier article. click the image for higher resolution The two images above show the complementarity of measurements made by different LHC experiments. The left image shows the x-Q2 kinematic