| 2025-09-27 | Particle accelerator byproduct |
| 2023-07-15 | One of many produced in a particle accelerator |
| 2021-01-17 | Quark-antiquark combo |
| 2014-11-28 | Unstable physics particle |
| 2010-12-26 | Quark/antiquark particle |
| 2010-01-17 | Quark/antiquark particle |
| 2008-12-28 | Elementary particle |
| 2008-01-20 | Quark-plus-antiquark particle |
| 2006-05-20 | Quark-antiquark combo |
| 2006-02-12 | Quark-plus-antiquark particle |
| 2004-11-28 | Fundamental physics particle |
| 2004-04-22 | Quark plus antiquark |
| 2004-01-08 | Physics particle |
| 2003-12-21 | Quark-plus-antiquark particle |
| 2002-06-22 | Particle in a quark model |
| 2002-03-06 | Elementary particle |
| 2002-02-10 | Quantum physics particle |
| 2001-07-01 | Subatomic particle |
| 2000-06-02 | Subatomic particle |
| 1998-07-07 | A quark and an antiquark |