Institute for Subatomic Physics

At the Institute for Subatomic Physics (SAP) we conduct fundamental experimental research into the building blocks of matter and the various forces acting on them. We are part of the ALICE experiment at the CERN's Large Hadron Collider (LHC) in Geneva (Switzerland) and we closely collaborate with the Nikhef institute in Amsterdam.

Science in the spotlight


News from UU

ALICE Event display. © CERN
13 November 2018
The coming month, the Large Hadron Collider (LHC) will collide lead beams to create the hottest and densest matter available in the laboratory.
Electrons in bonding (left) and non-bonding (right) Sierpiński triangles
12 November 2018
Utrecht physicists build fractal shape out of electrons
Ralph Meulenbroeks
6 November 2018
On 24 October, the YouTube channel by Ralph Meulenbroeks reached the magic number of one million views.


Publications Subatamic Physics

Elliptic flow of charged particles in Pb-Pb collisions at 2.76 TeV

In one of the first publications of the ALICE experiment, where our institute played a leading role in the analysis, we showed that the emission of particles in heavy-ion collisions at the LHC has a characteristic anisotropy, called elliptic flow. The observation demonstrates that a thermalised, dense system is created, and the strength of the effect shows, that the matter behaves as a perfect liquid with an extremely small viscosity.

More publications