The CMS detects an unexpected excess of top-antitop pairs, suggesting possible evidence for the elusive quantum state: the ...

The hypothetical particle, known as toponium, would be the result of merging a top quark and antiquark as well as the last missing example of quark-antiquark states known as quarkonium.

The hypoethical particle, known as toponium, would be the result of merging a top quark and antiquark as well as the last missing example of quark-antiquark states known as quarkonium. Toponium ...

Here’s the weird part – this process can also happen in reverse. Due to quantum fluctuations, two photons can also interact and create a quark and antiquark. Before the quark and antiquark destroy ...

But there are also particles called mesons that are made of one quark and one antiquark. They too have no color, so it stands that there must exist an antiblue, antigreen, and antired. Gluons ...

Then there are also antiquarks, their antimatter versions. A quark-antiquark clump is called a meson (they don’t annihilate each other because they are of different types, e.g. up + anti-down).

"If you produce a quark and antiquark back-to-back in a high energy collision, you expect these two particles to be entangled because they were produced in same interaction," said study co-author ...

However, these quark–antiquark pairs are far less sensitive to the electroweak interaction and do not tell us about origins of symmetry breaking nearly as effectively as single top quarks. To work ...

Ground-state upsilons would need the most energy—the hottest temperatures—to fall apart, and the more loosely bound quark-antiquark pairs would need less. So recreating post-Bang plasma ...

Upsilons, short-lived particles made of a heavy quark-antiquark pair (bottom-antibottom) bound together, turn out to be ideal particles for this task. "The upsilon is a very strongly bounded state ...