Evidence for CP violation in Λb0→ΛK+K– decays
This week, at a CERN seminar, the LHCb collaboration presented new results that provide evidence for CP violation in Λb0→ΛK+K– decays. LHCb is an experiment designed to study physics phenomena…
End of successful proton-proton collision data taking period
The 2024 proton-proton collision period at the LHC ended this week. This period was particularly successful for LHCb, also owing to the excellent performance of the LHC. The rate at…
Test of lepton flavour universality with Bs0 → ϕℓ+ℓ− decays
The LHCb collaboration submitted today a paper reporting new tests of lepton flavour universality, one of the cornerstone of the Standard Model (SM) of particle physics. It implies that the…
First observation of muonic Dalitz decays of χb mesons
The LHCb collaboration submitted today a paper reporting precise measurements of the mass values and splittings of the hidden-beauty particles that exist within the bb quark bound system called bottomonium.…
Measurement of the effective leptonic weak mixing angle
Today, at the 42nd International Conference on High Energy Physics, ICHEP, Prague, Czech Republic, the LHCb collaboration reported a measurement of the effective leptonic weak mixing angle, sin2θleff, the parameter…
Improved determination of the CKM angle γ
Today, at the 42nd International Conference on High Energy Physics, ICHEP, Prague, Czech Republic, the LHCb collaboration reported an improved determination of the CKM angle γ with a precision better…
Probing the nature of the mysterious particle χc1(3872)
Today, at a CERN seminar, the LHCb collaboration reported precise measurements of the properties of the mysterious particle χc1(3872), also known as the X(3872), using radiative decays χc1(3872)→ψ(2S)γ and χc1(3872)→J/ψγ.…
Observation of the rare Σ+→pμ+μ– decay
The LHCb collaboration reported the observation of the Σ+→pμ+μ– rare decay at the XV International Conference on Beauty, Charm, Hyperons in Hadronic Interactions (BEACH 2024) in Charleston, South Carolina, USA.…
ECAL and RICH sub-detector enhancements approved for construction
The LHCb experiment will upgrade the inner part of the Electromagnetic Calorimeter and the electronics of the Ring Imaging Cherenkov detectors in the next LHC Long Shutdown (LS3). On July…
LHCb observes the rare decay J/ψ→μ+μ–μ+μ–
Today, at the Rencontres de Moriond QCD and High Energy Interactions, the LHCb collaboration reported the observation of the rare elecromagnetic decay J/ψ→μ+μ–μ+μ–. The simultaneous discovery of the J/ψ meson…