Tag: News
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FBeam15
Today, for the first time in two years, both proton beams are circulating again in the LHC. The picture shows the LHC operators steering the two beams. The proton beam already traversed the LHCb detector one month ago and then continued through one quarter of the LHC circumference, see 7 March 2015 news. The two
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P5p
Angular analysis of the B0→K*μ+μ– decay. Today at the 50th Rencontres de Moriond Electroweak, in La Thuile (Italy), the LHCb collaboration presented the result of a first full angular analysis of the B0→K*μμ decay using its full LHC run 1 data sample. A previously published analysis of the experiments 2011 data sample found a deviation
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TDI
The LHCb collaboration is ready to take 13 TeV proton-proton collision data. This weekend the LHC proton beam has traversed the LHCb detector for the first time in over two years. At the end of November 2014 the proton beam already arrived at a stopper placed in the accelerator known as the “TED”, located at
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sin2beta
Precise measurement of the unitarity triangle angle β. Today at Les Rencontres de Physique de la Vallée d’Aoste, La Thuile, Italy, the LHCb collaboration presented an important result in our quest to understand the nature and origin of CP violation, which is a difference in behaviour between matter and antimatter. The result, derived from a
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TED
The LHCb collaboration took proton interaction data this weekend. The proton beam knocked at the LHC’s very solid door this weekend and found it still closed, but nonetheless managed to provide the LHCb collaboration with very interesting data. The CERN accelerator system (see video) is now fully operational, except for the LHC collider itself. This
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OpDa
The LHC experiments have today released physics data at the OpenData.cern.ch portal. The LHCb collaboration has contributed with its International Masterclasses exercise, in which the lifetime of the charm particle called the D0 meson may be measured using real proton-proton collision data recorded by the LHCb experiment during the 2011 data taking period. Details of
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StrBeaBa
The LHCb collaboration submitted today a paper reporting the discovery of two new particles. The particles, known as the Ξb‘- and Ξb*-, were predicted to exist by the quark model but had never been seen before. Like the protons that the LHC accelerates, the new particles are baryons made from three quarks bound together by
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phis3
Final run 1 result: φs = – 0.010 ± 0.039 rad Today, at the workshop “Implications of LHCb measurements and future prospects” at CERN, LHCb physicists have presented their final run 1 results of their analysis of the phase φs (the Bs CP-violating phase, for experts), see 27 August 2012, 5 March 2012 and 3
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200
The LHCb Collaboration has celebrated this week its 200th publication! The paper “Test of lepton universality using B+ → K+l+l– decays“ appeared in Physical Review Letters on October 6th. The American Physical Society, publisher of the Journal, has selected this article to be presented in “spotlighting exceptional research” news. The results published today were already
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LumiRun1
LHCb has the most precise answer. The LHCb Collaboration has just published the results of the luminosity calibration with a precision of 1.12%. This is the most precise luminosity measurement achieved so far at a bunched-beam hadron collider (see below). At the beginning of operation of a new particle collider, physicists start with measurements of