Awards of the LHCb Kaggle competition
The world’s community of machine learning data scientists organizes “Kaggle” competitions to solve the most difficult and interesting challenges in different fields. This year, for the first time, a competition…
A mysterious ridge effect
The LHCb collaboration has submitted today a paper reporting the study of correlations in particle production in proton-lead ion collisions at the LHC. The plots (see below) showing the angular…
20 birthday candles for LHCb
In August 1995 a Letter of Intent was submitted for LHCb, the world’s first dedicated b-physics experiment at a hadron collider. Today, the LHCb Collaboration has marked the 20th anniversary…
Revolutionary improvement of data acquisition and analysis
The first integrated data-taking and analysis in a High Energy Physics experiment. The procedure of data-taking and analysis at hadron colliders is performed in two steps. In the first one,…
A measurement of a fundamental parameter of the Standard Model
[ sin2θWeff = 0.23142±0.00073(stat)±0.00052(sys)±0.00056(theory) ] The LHCb collaboration has submitted a paper based on run 1 data which reports the measurement of a fundamental parameter of the Standard Model (SM),…
Is a b to a u quark transition modified by a new particle?
The LHCb collaboration published today in Nature Physics a paper based on run 1 data which reports the determination of the parameter |Vub| describing the transition of a b quark…
First LHC run2 physics results
Measurement of J/ψ production cross-sections in pp collisions at 13 TeV. [ σ(prompt Jψ) = 15.35±0.03±0.85 μb; σ(Jψ-from-b-hadron) = 2.36±0.01±0.13 μb; σ( bb) = 518±2±53 μb ] At the EPS-HEP…
Observation of particles composed of five quarks, pentaquark-charmonium states, seen in Λb0 → J/ψpK- decays
[ m(Pc+(4450)) = 4449.8±1.7±2.5 MeV, Γ = 39±5±19 MeV ] [ m(Pc+(4380)) = 4380±8±29 MeV, Γ = 205±18±86 MeV ] The LHCb collaboration submitted today a paper based on run…
First Physics at 13 TeV
LHC Run 2 started today. LHCb physicists have been eagerly awaiting this moment since 14 February 2013 when the last Run 1 collisions took place. The LHC has reached the…
An intriguing anomaly
Measurement of the decay B0 → D*+τ– ντ [ Branching fraction ratio B0 → D*+τ– ντ/ B0 → D*+μ– νμ = 0.336±0.027±0.030 ] Today, at the 13th Flavor Physics and…