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Hypernucleus
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=== Antihypernuclei === In August 2024 the [[STAR collaboration|STAR Collaboration]] reported the observation of the heaviest [[antimatter]] nucleus known, antihyperhydrogen-4 <math>{}_{\bar{{\boldsymbol{\Lambda }}}}{}^{{\bf{4}}}\bar{{\bf{H}}}</math> consisting of one [[antiproton]], two [[Antineutron|antineutrons]] and an [[antihyperon]].<ref>{{Cite journal |last1=Abdulhamid |first1=M. I. |last2=Aboona |first2=B. E. |last3=Adam |first3=J. |last4=Adamczyk |first4=L. |last5=Adams |first5=J. R. |last6=Aggarwal |first6=I. |last7=Aggarwal |first7=M. M. |last8=Ahammed |first8=Z. |last9=Aschenauer |first9=E. C. |last10=Aslam |first10=S. |last11=Atchison |first11=J. |last12=Bairathi |first12=V. |last13=Cap |first13=J. G. Ball |last14=Barish |first14=K. |last15=Bellwied |first15=R. |date=2024-08-21 |title=Observation of the antimatter hypernucleus $${}_{\bar{{\boldsymbol{\Lambda }}<nowiki>}}{}^</nowiki>{{\bf{4}}}\bar{{\bf{H}}}$$ |url=https://www.nature.com/articles/s41586-024-07823-0 |journal=Nature |volume=632 |issue=8027 |language=en |pages=1026β1031 |doi=10.1038/s41586-024-07823-0 |pmid=39169195 |issn=1476-4687}}</ref><ref>{{Cite web |author1=Ben Turner |date=2024-08-21 |title=Heaviest antimatter particle ever discovered could hold secrets to our universe's origins |url=https://www.livescience.com/physics-mathematics/particle-physics/scientists-discover-the-heaviest-antimatter-particle-ever-and-it-could-hold-secrets-to-our-universes-origins |access-date=2024-08-26 |website=livescience.com |language=en}}</ref><ref>{{Cite web |last=Egede |first=Ulrik |date=2024-08-21 |title=Heaviest antimatter observation yet will fine-tune numbers for dark matter search |url=https://theconversation.com/heaviest-antimatter-observation-yet-will-fine-tune-numbers-for-dark-matter-search-237127 |access-date=2024-08-26 |website=The Conversation |language=en-US}}</ref> The anti-lambda hyperon <math>\bar{\Lambda }</math><ref>{{Cite journal |last1=Prowse |first1=D. J. |last2=Baldo-Ceolin |first2=M. |date=1958-09-01 |title=Anti-Lambda Hyperon |url=https://link.aps.org/doi/10.1103/PhysRevLett.1.179 |journal=Physical Review Letters |language=en |volume=1 |issue=5 |pages=179β180 |doi=10.1103/PhysRevLett.1.179 |bibcode=1958PhRvL...1..179P |issn=0031-9007|url-access=subscription }}</ref> and the antihypertriton <math>{}_{\bar{\Lambda }}{}^{3}\bar{{\rm{H}}}</math><ref>{{Cite journal |last1=The STAR Collaboration |last2=Abelev |first2=B. I. |last3=Aggarwal |first3=M. M. |last4=Ahammed |first4=Z. |last5=Alakhverdyants |first5=A. V. |last6=Alekseev |first6=I. |last7=Anderson |first7=B. D. |last8=Arkhipkin |first8=D. |last9=Averichev |first9=G. S. |last10=Balewski |first10=J. |last11=Barnby |first11=L. S. |last12=Baumgart |first12=S. |last13=Beavis |first13=D. R. |last14=Bellwied |first14=R. |last15=Betancourt |first15=M. J. |date=2010-04-02 |title=Observation of an Antimatter Hypernucleus |url=https://www.science.org/doi/10.1126/science.1183980 |journal=Science |language=en |volume=328 |issue=5974 |pages=58β62 |doi=10.1126/science.1183980 |pmid=20203011 |issn=0036-8075|arxiv=1003.2030 |bibcode=2010Sci...328...58. }}</ref> have also been previously observed.
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