# Flavour physics

### LHCb awards physics prizes for its Kaggle competition

Machine learning, also known in physics circles as multivariate analysis, is used more and more in high-energy physics, most visibly in data analysis but also in other applications such as trigger and...

### BESIII makes first direct measurement of the Λc at threshold

The charmed baryon, Λc, was first observed at Fermilab in 1976. Now, 40 years later, the Beijing Spectrometer (BESIII) experiment at the Beijing Electron–Positron Collider II (BEPCII) has measure...

### DZero discovers new four-flavour particle

Scientists from the DZero collaboration at the US Department of Energy’s Fermilab have discovered a new particle – the latest member to be added to the exotic species of particles known as tetraqu...

### LHCb brings charm physics to the frontier of experimental knowledge

Owing to the large cross-section for charm production at the LHC, LHCb collected the world’s largest sample of charmed hadrons, allowing for stringent tests of the Cabibbo–Kobayashi–...

### Is the Standard Model about to crater?

There are now quite a few discrepancies, or “tensions”, between laboratory experiments and the predictions of the Standard Model (SM) of particle physics. All of them are of the 2...

### LHCb reports observation of pentaquarks

In 1964, Murray Gell-Mann and George Zweig independently predicted a substructure for hadrons: baryons would be comprised of three quarks, mesons of a quark–antiquark pair. They also said that b...

### J/ψ mesons, b decays and more

At EPS-HEP2015, the LHCb collaboration presented the first measurement of the J/ψ production cross-section in proton–proton (pp) collisions at 13 TeV. Using this measurement, they also...

### SuperKEKB goes in hunt of flavour at the terascale

A schematic view of SuperKEKB. Image credit: KEK.   What is dark matter? Why is there more matter than antimatter in the universe? These are some of the most fundamental puzzles in modern ...

### Belle finds more exotic mesons

The Belle collaboration has announced the discovery at the Japanese B-factory, KEKB, of three new exotic sub-atomic particles, which they have labelled the Z1, Z2 and Yb. The Z1 and Z2 states appear t...

### BaBar gets right to the bottom

The BaBar collaboration, working at SLAC has observed the ground state of the bottomonium family, the ηb meson. Bottomonium particles are bound states of a bottom quark and its antiquark. The first ...