Editing Hadron (section)

==References==
{{reflist|25em|refs=

<ref name="Aaij-etal-2015-LHCb-Jψp">
{{cite journal |last=Aaij |first=R. |display-authors=etal |year=2015 |title=Observation of J/ψp resonances consistent with pentaquark states in Λ{{su|p=0|b=b}}&nbsp;→&nbsp;J/ψK{{sup|−}}p decays |journal=[[Physical Review Letters]] |volume=115 |issue=7 |pages=072001 |arxiv=1507.03414 |bibcode=2015PhRvL.115g2001A |doi=10.1103/PhysRevLett.115.072001 |pmid=26317714 |s2cid=119204136 |collaboration=[[LHCb|LHCb collaboration]]}}
</ref>

<ref name="Amsler-etal-2008-PDG">
{{cite journal |last=Amsler |first=C. |display-authors=etal |year=2008 |title=Quark Model |url=http://pdg.lbl.gov/2008/reviews/quarkmodrpp.pdf |journal=[[Physics Letters B]] |series=Review of Particle Physics |volume=667 |issue=1 |pages=1–6 |bibcode=2008PhLB..667....1A |doi=10.1016/j.physletb.2008.07.018 |hdl-access=free |collaboration=[[Particle Data Group]] |hdl=1854/LU-685594}}
</ref>

<ref name="Bethke-2007">
{{Cite journal |last=Bethke |first=S. |year=2007 |title=Experimental tests of asymptotic freedom |journal=[[Progress in Particle and Nuclear Physics]] |volume=58 |issue=2 |pages=351–386 |arxiv=hep-ex/0606035 |bibcode=2007PrPNP..58..351B |doi=10.1016/j.ppnp.2006.06.001 |s2cid=14915298}}
</ref>

<ref name="Choi-etal-2008-Belle">
{{cite journal |last=Choi |first=S.-K. |display-authors=etal |year=2008 |title=Observation of a resonance-like structure in the {{Subatomic particle|Pion+-}}Ψ′ mass distribution in exclusive B→K{{Subatomic particle|Pion+-}}Ψ′ decays |journal=Physical Review Letters |volume=100 |issue=14 |pages=142001 |arxiv=0708.1790 |bibcode=2008PhRvL.100n2001C |doi=10.1103/PhysRevLett.100.142001 |pmid=18518023 |s2cid=119138620 |collaboration=[[Belle experiment|Belle Collaboration]]}}
</ref>

<ref name="GellMann-1964">
{{cite journal |last=Gell-Mann |first=M. |year=1964 |title=A schematic model of baryons and mesons |journal=Physics Letters |volume=8 |issue=3 |pages=214–215 |bibcode=1964PhL.....8..214G |doi=10.1016/S0031-9163(64)92001-3}}
</ref>

<ref name="Mann-2013-06-Wired">
{{cite news |last=Mann |first=Adam |date=2013-06-17 |title=Mysterious subatomic particle may represent exotic new form of matter |url=https://www.wired.com/wiredscience/2013/06/four-quark-particle |access-date=2021-08-27 |magazine=[[Wired (magazine)|Wired]] |department=Science}} — News story about {{math|Z}}(3900) particle discovery.
</ref>

<ref name="Okun-1962-CERN-plenary">
{{cite conference |last=Okun |first=L. B. |author-link=Lev Okun |year=1962 |title=The theory of weak interaction |conference=International Conference on High-Energy Physics |type=plenary talk |page=845 |bibcode=1962hep..conf..845O |place=CERN, Geneva, CH |book-title=Proceedings of 1962 International Conference on High-Energy Physics at CERN}}
</ref>

}} <!-- end "refs=" -->