Production and detection of cold antihydrogen atoms

  title={Production and detection of cold antihydrogen atoms},
  author={M. Amoretti and Claude Amsler and Germano Bonomi and Adam Bouchta and Paul D. Bowe and Carlo Carraro and C. L. Cesar and Martin Charlton and M. J. T. Collier and M. Doser and V. Filippini and Kevin Sanford Fine and Adriano Fontana and M C Fujiwara and R. Funakoshi and Pablo Genova and J. S. Hangst and Ryugo Hayano and M. H. Holzscheiter and Lars V. J{\o}rgensen and Vittorio Lagomarsino and Rolf Landua and D. Lindel{\"o}f and Elisa Lodi Rizzini and Mario Macr{\`i} and N Madsen and G. E. Manuzio and M. Marchesotti and Paolo Montagna and H. S. Pruys and Christian Regenfus and Petra Riedler and Jacky Rochet and Alberto Rotondi and Gary Rouleau and Gemma Testera and Alessandro Variola and Thomas Lee Watson and D. P. Werf},
A theoretical underpinning of the standard model of fundamental particles and interactions is CPT invariance, which requires that the laws of physics be invariant under the combined discrete operations of charge conjugation, parity and time reversal. Antimatter, the existence of which was predicted by Dirac, can be used to test the CPT theorem—experimental investigations involving comparisons of particles with antiparticles are numerous. Cold atoms and anti-atoms, such as hydrogen and… Expand
Trapped antihydrogen: A new frontier in fundamental physics
Antihydrogen, the bound state of an antiproton and a positron, has been produced at low energies at CERN since 2002. Antihydrogen is of interest for use in precision tests of nature's fundamentalExpand
Trapped antihydrogen
T trapping of antihydrogen atoms is demonstrated and opens the door to precision measurements on anti-atoms, which can soon be subjected to the same techniques as developed for hydrogen. Expand
Fundamental Physics with Antihydrogen
Antihydrogen—the antimatter equivalent of the hydrogen atom—is of fundamental interest as a test bed for universal symmetries—such as CPT and the Weak Equivalence Principle for gravitation.Expand
Physics with antihydrogen
Performing measurements of the properties of antihydrogen, the bound state of an antiproton and a positron, and comparing the results with those for ordinary hydrogen, has long been seen as a routeExpand
Antimatter transport processes
A comparison of the 1S-2S transitions of hydrogen and antihydrogen will yield a stringent test of CPT conservation. Necessarily, the antihydrogen atoms need to be trapped to perform high precisionExpand
Testing CPT And Antigravity With Trapped Antihydrogen At ALPHA
High precision antihydrogen experiments allow tests of fundamental theoretical descriptions of nature. These experiments are performed with the ALPHA apparatus, where ultra-low energy antihydrogen isExpand
Observation of Cold Antihydrogen
The simplest electrical neutral system made entirely of antimatter is the antihydrogen atom ( H ¯ 0 ) consisting of a positron (e+) orbiting an antiproton ( p ¯ ). The first H ¯ 0 atoms produced in pExpand
An experimental limit on the charge of antihydrogen
A retrospective analysis of the influence of electric fields on antiHydrogen atoms released from the ALPHA trap finds a mean axial deflection, which leads to a bound on the charge Qe of antihydrogen of Q=(−1.3±1.1±0.4) × 10−8.4, where e is the unit charge. Expand
Pulsed production of antihydrogen
Antihydrogen atoms with K or sub-K temperature are a powerful tool to precisely probe the validity of fundamental physics laws and the design of highly sensitive experiments needs antihydrogen withExpand
Search For Trapped Antihydrogen
Abstract We present the results of an experiment to search for trapped antihydrogen atoms with the ALPHA antihydrogen trap at the CERN Antiproton Decelerator. Sensitive diagnostics of theExpand


Production of antihydrogen
Results are presented for a measurement for the production of the antihydrogen atom H0 ≡ pe+, the simplest atomic bound state of antimatter. A method has been used by the PS210 collaboration atExpand
Review of particle properties.
This biennial Review summarizes much of Particle Physics using data from previous editions, plus 2205 new measurements from 667 papers, and features expanded coverage of CP violation in B mesons and of neutrino oscillations. Expand
Review of Particle Physics.
  • Barnett, Carone, +34 authors Amsler
  • Physics, Medicine
  • Physical review. D, Particles and fields
  • 1996
This biennial Review summarizes much of particle physics. Using data from previous editions., plus 2778 new measurements from 645 papers, we list, evaluate, and average measured properties of gaugeExpand
A cryogenic silicon micro-strip and pure-CsI detector for detection of antihydrogen annihilations
Abstract A new kind of detector for the end products of antihydrogen annihilations, operating at liquid nitrogen temperatures, was designed, developed and built for the ATHENA experiment at CERN.Expand
Observation of Atomic Antihydrogen
We report the background-free observation of atomic antihydrogen, produced by interactions of an antiproton beam with a hydrogen gas jet target in the Fermilab Antiproton Accumulator. We measure theExpand
Antihydrogen production using trapped plasmas
Abstract Now that antiprotons have been captured in an ion trap, we investigate the possibility of producing antihydrogen by merging cold trapped plasmas of antiprotons and positrons. The calculatedExpand
First positron cooling of antiprotons.
Positrons are used to cool antiprotons for the first time. The oppositely charged positrons and antiprotons are first simultaneously accumulated in separate Penning trap volumes, and then areExpand
Measurement of the hydrogen 1S- 2S transition frequency by phase coherent comparison with a microwave cesium fountain clock
We report on an absolute frequency measurement of the hydrogen 1S-2S two-photon transition in a cold atomic beam with an accuracy of 1.8 parts in 10(14). Our experimental result of 2 466 061 413 187Expand
Temperature dependence of pure CsI: scintillation light yield and decay time
Abstract The temperature dependence of the light emission for pure CsI crystals has been measured with photomultipliers, and photodiodes with wavelength shifters from 80– 300 K . The light yield atExpand
Producing Slow Antihydrogen for a Test of CPT Symmetry with ATHENA
The ATHENA experiment at the Antiproton Decelerator facility at CERN aims at testing CPT symmetry with antihydrogen. An overview of the experiment, together with preliminary results of developmentExpand