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International Journal of High-Energy Physics

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Digital edition

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CERN Courier: May 1999

Cover of CERN Courier Volume 39 Issue 4

Astrowatch

Astrowatch

Supernovae and gamma-ray bursts are the biggest explosions in the universe bar the Big Bang. The former, occasionally visible with the naked eye, have been chronicled for centuries, while gamma-ray bursters had to wait for modern technology before being revealed. The study of these explosions provides valuable information on the evolution of the universe. In this special edition, Astrowatch previews some of the presentations at the Symposium on Supernovae and Gamma Ray Bursts at the Space Telescope Science Institute in Baltimore on 3-6 May.

Features

EXPO 2000

At the Germany DESY laboratory in Hamburg, an ambitious X-ray laser is scheduled to come into regular operation in the year 2003. Next year, on-site EXPO 2000 visitors will be able to see the new machine being constructed.

The return of antimatter

After a three-year pause, antiproton physics gets under way later this year at CERN using the new Antiproton Decelerator ring. These articles look at the AD and its physics programme.

Telegrams from the antiworld

Physics with antiparticles is difficult, but one trick is to replace atomic electrons by antiprotons. The resulting compact atoms are useful antiparticle laboratories.

Per Ardua ad ASACUSA

A major antiproton experiment at CERN's Antiproton Decelerator is currently lining up an impressive array of techniques to investigate the interaction of antiprotons with atoms.

Is spacetime symmetric?

Do particles and their antiparticles behave in the same way? Even tiny differences could be amplified over astronomical distances to produce very large effects.

A wide span of physics

Nobel prizewinner in 1984, architect and mason of CERN's biggest ever physics discovery and director-general of CERN from 1989 to 1993, Carlo Rubbia remains a continual fountainhead of new ideas. A recent seminar at CERN highlighted the extent of his work.

Echoes of a report

A major report by a working group of the influential OECD Megascience forum provides a valuable snapshot of nuclear physics and makes far-reaching recommendations for its future direction.

Copenhagen interpretation

Now playing to full houses in London's theatreland is Copenhagen, a fascinating new play that imagines a dialogue between the ghosts of quantum pioneers Niels Bohr and Werner Heisenberg.

The incomprehensible is always fresh

Communicating the unfamiliar ideas of basic physics is already a challenge. With theories for the 21st century already on the drawing board and looking even more bizarre, CERN Courier editor Gordon Fraser wonders how to get the message across.

Don't be afraid of the dark

Unveiling the nature of dark matter ­ matter revealing itself only via its gravitational interaction ­ is a continuous challenge in contemporary cosmology. The job of particle physics experiments is to search for the material of this vital but invisible matter. A recent meeting in Heidelberg surveyed the dark matter scene.