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Nat Commun. 2014;5:3089. doi: 10.1038/ncomms4089.

A source of antihydrogen for in-flight hyperfine spectroscopy.

Author information

  • 1Institute of Physics, Graduate School of Arts and Sciences, University of Tokyo, Tokyo 153-8902, Japan.
  • 2Ulmer Initiative Research Unit, RIKEN, Saitama 351-0198, Japan.
  • 3Atomic Physics Laboratory, RIKEN, Saitama 351-0198, Japan.
  • 4Stefan-Meyer-Institut fu¨r Subatomare Physik, O¨sterreichische Akademie der Wissenschaften, Wien 1090, Austria.
  • 5CERN, Gene`ve 1211, Switzerland.
  • 61] Dipartimento di Ingegneria dell'Informazione, Universita` di Brescia, Brescia 25133, Italy [2] Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Brescia, Brescia 25133, Italy.
  • 71] Stefan-Meyer-Institut fu¨r Subatomare Physik, O¨sterreichische Akademie der Wissenschaften, Wien 1090, Austria [2] Present address: CERN, Gene`ve 1211, Switzerland.
  • 8Department of Physics, Tokyo University of Science, Tokyo 162-8601, Japan.
  • 9Graduate School of Advanced Sciences of Matter, Hiroshima University, Hiroshima 739-8530, Japan.
  • 10Dipartimento di Ingegneria dell'Informazione, Universita` di Brescia, Brescia 25133, Italy.
  • 111] Institute of Physics, Graduate School of Arts and Sciences, University of Tokyo, Tokyo 153-8902, Japan [2] Atomic Physics Laboratory, RIKEN, Saitama 351-0198, Japan.

Abstract

Antihydrogen, a positron bound to an antiproton, is the simplest antiatom. Its counterpart-hydrogen--is one of the most precisely investigated and best understood systems in physics research. High-resolution comparisons of both systems provide sensitive tests of CPT symmetry, which is the most fundamental symmetry in the Standard Model of elementary particle physics. Any measured difference would point to CPT violation and thus to new physics. Here we report the development of an antihydrogen source using a cusp trap for in-flight spectroscopy. A total of 80 antihydrogen atoms are unambiguously detected 2.7 m downstream of the production region, where perturbing residual magnetic fields are small. This is a major step towards precision spectroscopy of the ground-state hyperfine splitting of antihydrogen using Rabi-like beam spectroscopy.

PMID:
24448273
[PubMed]
PMCID:
PMC3945878
Free PMC Article
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