https://www.livescience.com/53878-tetraquark-particle-possibly-discovered.html
Never-Seen-Before Tetraquark Particle Possibly Spotted in Atom Smasher | Live Science
Feb 29, 2016 - Data from the DZero experiment shows evidence of a particle containing four different types of quarks.
https://www.livescience.com/physicists-discover-rare-tetraquarks.html
Physicists discover new, exotic flavor of tetraquark | Live Science
Jul 9, 2020 - Physicists have discovered a new, exotic kind of tetraquark, made up of four charm quarks. They say it's a major breakthrough.
discover newphysicistsexoticflavortetraquark
https://arxiv.org/abs/2103.13140
[2103.13140] Tetraquark state $X(6900)$ and the interaction between diquark and antidiquark
Abstract page for arXiv paper 2103.13140: Tetraquark state $X(6900)$ and the interaction between diquark and antidiquark
state x
https://arxiv.org/abs/2109.01038
[2109.01038] Observation of an exotic narrow doubly charmed tetraquark
Abstract page for arXiv paper 2109.01038: Observation of an exotic narrow doubly charmed tetraquark
of an2109observationexoticnarrow
https://arxiv.org/abs/1209.6274
[1209.6274] Lattice QCD signal for a bottom-bottom tetraquark
Abstract page for arXiv paper 1209.6274: Lattice QCD signal for a bottom-bottom tetraquark
lattice qcd1209signalbottomtetraquark
https://arxiv.org/abs/2306.12731
[2306.12731] Production of fully-heavy tetraquark states through the double parton scattering...
Abstract page for arXiv paper 2306.12731: Production of fully-heavy tetraquark states through the double parton scattering mechanism in $pp$ and $pA$ collisions
https://www.livescience.com/60900-tetraquark-particle-exists.html?_ga=2.168294247.791489743.1510260667-840771832.1481289556
'Holy Grail' Hadron: Scientists Are Close to Detecting the Elusive Tetraquark Particle | Live...
Nov 9, 2017 - Like finding a needle in a haystack of haystacks