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…
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…
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…
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…
Observation of the different behaviour of baryonic matter and antimatter.
First observation of CP violation in baryon decays – an important milestone in the history of particle physics. Yesterday, at the Rencontres de Moriond EW, the LHCb collaboration reported the…
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…