antitop

The observation of the production of single top quarks (rather than the easier-to-see production of top-antitop quark pairs) has been a goal of the Tevatron experiments for years.

Closing in on the Higgs Boson John 2009

In this case, the events researchers were looking for were collisions that produced top and antitop quarks the top quark is the second-heaviest of the six quarks; only the lightest quarks make up the matter we're familiar with.

Ars Technica John Timmer 2011

Typically, these quarks tend to leave the collisions with a slight bias: top quarks prefer to travel in the direction of the proton, with the antitop going backwards relative to the proton.

Ars Technica John Timmer 2011

But it took another half decade after the LEP startup to amass the data sample necessary to get the first glimpse of top-antitop production in the CDF and D0 experiments at Fermilab.

Breaking News: CBS News 2011

By searching for a top-antitop signature and the associated Higgs boson decay to a pair of b-quark jets, one can investigate the existence of Higgs bosons in the mass range where the decay is most frequent - i.e., the region where all indirect evidence puts it.

A Quantum Diaries Survivor 2009

Only after the beam intensity and the center of mass energy is a lot higher will we expect to see rarer and more interesting processes like W and Z boson production, and top quark pair production (top-antitop pairs).

Discover Blogs 2009

If you have a large sample of top-antitop events, you may be tempted to reconstruct the total mass of a hypothetical particle X which decayed to produce the two top quarks.

Scientific Blogging 2009

Could be a pair of top-antitop or bottom antibottom or two photons or two Z0s … OK!

Recently Uploaded Slideshows 2008

Beware, this implies that also opposite-sign electron-muon pairs should contain a similar excess: well noted, but in that case, such an excess would have to fight much larger backgrounds from correlated electron-muon production by physical processes such as top-antitop production, WW production, etcetera.

A Quantum Diaries Survivor dorigo 2008