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Virtual strange quark–antiquark pairs are always spin aligned.—Georgina Jedikovska, Interesting Engineering, 5 Feb. 2026 Differences between matter and antimatter have previously been observed in the behaviour of another type of particle, mesons, which are made of a quark and an antiquark.—William Barter, Space.com, 1 Aug. 2025 That explosion of energy converts itself into a quark and antiquark pair.—Henry Carnell, Quanta Magazine, 10 Jan. 2025 Specifically, a photon with sufficient energy can be converted into what's called a J/ψ meson, composed of a charm quark and charm antiquark through a process that's sensitive to the configuration of gluons in any nearby protons.—John Timmer, Ars Technica, 3 Apr. 2023 See All Example Sentences for antiquark