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The LHCb collaboration turns 30!
In August 1995 a Letter of Intent was submitted for the LHCb experiment, the world’s first dedicated B-physics experiment exploiting the unique potential of high-energy hadron-hadron collisions. This year, the LHCb collaboration has marked the 30th anniversary of this event. Click the cartoon (by Adrien Miqueu) for a higher-resolution version. The bound state of a…
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Special light-ion LHC runs
The LHC carried out a special run programme early summer. First results were reported by the ALICE, ATLAS, CMS and LHCb experiments at the Initial Stages of High-Energy Nuclear Collisions conference. These results were also presented at a CERN seminar and reported in a CERN news. During these special runs LHCb successfully acquired proton-oxygen (pO)…
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Searching for new physics with the flavour changing neutral current decay B0→K*μ+μ–
Last week at the LHCC open session and this week at a CERN seminar, the LHCb collaboration presented the legacy results from Run-1 and Run-2 data of the angular distributions of B0→K*μ+μ– decays. The analysis of B0→K*μ+μ– decays presents a promising method for exploring the potential effects of undiscovered particles (see the CERN Courier article…
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Observation of orbitally excited Bc+ states
At a CERN seminar today, the LHCb collaboration announced the first observation of orbitally excited Bc+ states, which are composed of a beauty-charm quark-antiquark pair. Within the expected mass range for excited 1P-wave Bc+ states a wide peaking structure was observed in the Bc+γ mass spectrum. The simultaneous discovery of the first heavy quark-antiquark bound…
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The first dedicated Z-boson mass measurement at the LHC
Today, the LHCb collaboration submitted for publication a paper reporting the first dedicated Z-boson mass measurement at the LHC using Z→μ+μ− decays. The data were recorded in 2016 and correspond to an integrated luminosity of 1.7 fb−1. Around 174×103 Z-boson events were selected. The image below shows the invariant mass of two muons from the…