Skip to main content
Email Print Share

A Proton-antiproton Collision

The typical outcome of a collision of a proton and an antiproton


This image from the DZero detector shows the typical outcome of a collision of a proton and an antiproton at Fermilab's Tevatron collider. The curved red paths mark the trajectories of charged particles recorded in the detector's central tracking chamber. The colored bars indicate particle energies deposited in the detector. The blue disks correspond to part of DZero's physical structure.

Physicists analyzed several years' worth of results from the Tevatron collider and came up with the most accurate measurement to date of the mass of the W boson, as well as narrowed down the possible mass of the still undiscovered Higgs boson.

The DZero collaboration is supported by the U.S. Department of Energy, the National Science Foundation (NSF) and international funding agencies.

To learn more, read the NSF Discovery story A Better Mass for the W Boson; Higgs Boson Given Less Space to Hide. (Date of Image: October 2008)

Credit: DZero collaboration
See other images like this in NSF's Science360 for iPad app. To download the Science360 for iPad application for free, visit the Apple iTunes store.

General Restrictions:
Images and other media in the National Science Foundation Multimedia Gallery are available for use in print and electronic material by NSF employees, members of the media, university staff, teachers and the general public. All media in the gallery are intended for personal, educational and nonprofit/non-commercial use only.

Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation. Additional information about general usage can be found in Conditions.

Also Available:
Download the high-resolution JPG version of the image. (524 KB)

Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.