Tag: News
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CMSSM
Results presented by the LHCb Collaboration at the Rencontres de Moriond EW and QCD conferences allowed theorists to squeeze strongly the parameters of supersymmetric extensions of the Standard Model (SUSY), the most popular new physics model. The simplest version of this model, called the Minimal Supersymmetric Standard Model (MSSM), predicted the frequencies with which Bs
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KstarMuMu2
[ Zero crossing point B0d →K*μμ = 4.9+1.1-1.3 GeV2 ] LHCb physicists have continued their search for physics beyond the Standard Model using the B0d decay into a K* meson (an excited kaon), and a μ+ and μ-. New physics contributions can change various distributions that describe the decay process. For example, the number of
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phis-2
[ φs = -0.002 ± 0.083 ± 0.027 rad] LHCb physicists have reported today at the Rencontres de Moriond EW conference important progress in measurement of the difference between properties of matter and antimatter for the strange beauty Bs mesons. The new results improve on those presented at the summer 2011 conferences. The size of
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BsMuMu2
[ Branching ratio B0s →μμ < 4.5×10-9 at 95% CL (< 1.4 SM) ] The LHCb collaboration has announced today at the Rencontres de Moriond EW conference one of the most hotly anticipated results from the LHC. LHCb has shown that the frequency with which a Bs meson decays into a pair of oppositely charged
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DeltaAcp
[ ΔACP = (-0.82 ± 0.21 ± 0.11)% ] The LHCb Collaboration has presented today at the Hadron Collider Particle Symposium in Paris possible first evidence for CP violation, the difference between behaviour of matter (particles) and antimatter (antiparticles), in charm decays. The study of CP violation in both charm and beauty particle decays is
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Data2011
The 2011 proton-proton collision data taking period has ended today. LHC collider and LHCb experiment have been working extremaly well. LHCb has recorded all in all an impressive 1.1 fb-1 out of a 1.22 fb-1 delivered at 3.5 TeV. “We’ve got from the LHC the amount of data we dreamt of at the beginning of
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phis
[ φs = 0.03 ± 0.16 ± 0.07 ] LHCb physicists have presented today the most precise measurement of φs (the Bs mixing phase, for experts) at the Lepton Photon conference in Mumbai (India). The value of φs is precisely predicted in the Standard Model and sets the scale for the difference between properties of
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MaM
An important part of the LHCb physics programme is reserved for studying differences between the properties of matter and antimatter (CP violation for experts). At the EPS-HEP meeting in Grenoble this week the LHCb physicists have presented distributions in which these differences can be clearly seen. click the image for higher resolution The blue line
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KstarMuMu
LHCb Physicists have also presented results of their search for new physics using the B0d (composed of a beauty antiquark (b) bound with a down quark d) decay into an excited K meson, K*, and a μ+ and μ-. The partial rate as a function of the square of the di-muon invariant mass (q2) and
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BsMuMu
[ Branching ratio B0s →μμ < 1.2×10-8 at 90% CL and 1.5×10-8 at 95% CL ] LHCb physicists continue their search for new physics, see 8 April 2011 news for introduction. They have presented updated results during the International Europhysics Conference on High Energy Physics (EPS-HEP) at Grenoble this week. The LHCb physicists have succeeded