Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Precision measurement

Exciting antiprotons


Shining light on an antiproton masquerading as an electron in a helium atom is a rich source of physics. An approach that brings this technique to unprecedented precision will allow new tests of matter–antimatter symmetry. See Letter p.484

This is a preview of subscription content

Access options

Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. Maddox, J. Nature 353, 207 (1991).

    ADS  Article  Google Scholar 

  2. Iwasaki, M. et al. Phys. Rev. Lett. 67, 1246–1249 (1991).

    ADS  CAS  Article  Google Scholar 

  3. Hori, M. et al. Nature 476, 484–488 (2011).

    Article  Google Scholar 

  4. Korobov, V. I. Phys. Rev. A 77, 042506 (2008).

    ADS  Article  Google Scholar 

  5. Hayano, R. S. et al. Rep. Prog. Phys. 70, 1995–2065 (2007).

    ADS  CAS  Article  Google Scholar 

  6. Niering, M. et al. Phys. Rev. Lett. 84, 5496–5499 (2000).

    ADS  CAS  Article  Google Scholar 

  7. Pohl, R. et al. Nature 466, 213–216 (2010).

    ADS  CAS  Article  Google Scholar 

  8. Hudson, J. J. et al. Nature 473, 493–496 (2011).

    ADS  CAS  Article  Google Scholar 

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to Mike Charlton.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Charlton, M. Exciting antiprotons. Nature 475, 459–460 (2011).

Download citation

  • Published:

  • Issue Date:

  • DOI:


Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing