Particle tracks in bubble chamber
Bubble chamber particle tracks. Colouredimage showing a collection of tracks left bysubatomic particles in a bubble chamber. A bubblechamber is a container filled with liquid hydrogenwhich is superheated - momentarily raised aboveits normal boiling point by a sudden drop inpressure in the container. Any charged particlepassing through the liquid in this state leavesbehind a trail of tiny bubbles as the liquid boilsin its wake. These bubbles are seen as finetracks, showing the characteristic paths ofdifferent types of particle. The paths are curveddue to an intense applied magnetic field. Thetightly-wound spiral tracks are due to electronsand positrons.
© Cern, P.loiez/Science Photo Library
Simulation of Higgs boson production
Simulated detection of Higgs boson. Computer simulation of an event in which the decay of a Higgs boson particle produces four muons. Two of these muons are seen here (green tracks). The muons, along with countless other particles (red and blue tracks), are produced in a head-on collision between two protons. The Higgs boson is a localised clustering in the Higgs Field. This field permeates space, and local distortions of the Higgs Field are thought to be the way that particles gain mass. This image shows how the Higgs boson might be seen in the CMS detector on the Large Hadron Collider at CERN, the European particle physics laboratory.
© DAVID PARKER/SCIENCE PHOTO LIBRARY
Particle physics experiment, artwork
Particle physics experiment. Artwork of tracks of particles detected following a collision in a particle accelerator. In these experiments, particles are accelerated to high energies near the speed of light. They are then collided with other particles or a stationary target. The resulting release of energy can lead to the creation of new high-energy particles identified by their tracks and the particles produced as they decay. Analysis of the results can help confirm theories about the fundamental nature of the universe and its particles.
© EQUINOX GRAPHICS/SCIENCE PHOTO LIBRARY