In recent years, there has been a wealth of new science involving low-energy antimatter (ie,
positrons and antiprotons) at energies ranging from 10 2 to less than 10-3 eV. Much of this …

Abstract The Antiproton Decelerator (AD) facility of CERN began operation in 1999 to serve
experiments for studies of CPT invariance by precision laser and microwave spectroscopy of …

The spectrum of the hydrogen atom has played a central part in fundamental physics over
the past 200 years. Historical examples of its importance include the wavelength …

Atoms made of a particle and an antiparticle are unstable, usually surviving less than a
microsecond. Antihydrogen, made entirely of antiparticles, is believed to be stable, and it is …

Physicists have long wondered whether the gravitational interactions between matter and
antimatter might be different from those between matter and itself. Although there are many …

Antihydrogen atoms (H¯) are confined in an Ioffe trap for 15–1000 s—long enough to ensure
that they reach their ground state. Though reproducibility challenges remain in making large …

Abstract PUMA, antiProton Unstable Matter Annihilation, is a nuclear-physics experiment at
CERN aiming at probing the surface properties of stable and rare isotopes by use of low …

The hydrogen atom is one of the most important and influential model systems in modern
physics. Attempts to understand its spectrum are inextricably linked to the early history and …

Positrons (ie, antielectrons) find use in a wide variety of applications, and antiprotons are
required for the formation and study of antihydrogen. Available sources of these antiparticles …

The ALPHA collaboration, based at CERN, has recently succeeded in confining cold
antihydrogen atoms in a magnetic minimum neutral atom trap and has performed the first …