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. 2010 Apr 2;328(5974):58-62.
doi: 10.1126/science.1183980. Epub 2010 Mar 4.

Observation of an antimatter hypernucleus

STAR CollaborationB I AbelevM M AggarwalZ AhammedA V AlakhverdyantsI AlekseevB D AndersonD ArkhipkinG S AverichevJ BalewskiL S BarnbyS BaumgartD R BeavisR BellwiedM J BetancourtR R BettsA BhasinA K BhatiH BichselJ BielcikJ BielcikovaB BiritzL C BlandB E BonnerJ BouchetE BraidotA V BrandinA BridgemanE BrunaS BueltmannI BunzarovT P BurtonX Z CaiH CainesM CalderonO CatuD CebraR CendejasM C CervantesZ ChajeckiP ChaloupkaS ChattopadhyayH F ChenJ H ChenJ Y ChenJ ChengM CherneyA ChikanianK E ChoiW ChristieP ChungR F ClarkeM J M CodringtonR CorlissJ G CramerH J CrawfordD DasS DashA Davila LeyvaL C De SilvaR R DebbeT G DedovichM DePhillipsA A DerevschikovR Derradi de SouzaL DidenkoP DjawothoS M DograX DongJ L DrachenbergJ E DraperJ C DunlopM R Dutta MazumdarL G EfimovE ElhalhuliM ElnimrJ EngelageG EppleyB ErazmusM EstienneL EunO EvdokimovP FachiniR FatemiJ FedorisinR G FerschP FilipE FinchV FineY FisyakC A GagliardiD R GangadharanM S GantiE J Garcia-SolisA GeromitsosF GeurtsV GhazikhanianP GhoshY N GorbunovA GordonO GrebenyukD GrosnickB GrubeS M GuertinA GuptaN GuptaW GurynB HaagA HamedL-X HanJ W HarrisJ P Hays-WehleM HeinzS HeppelmannA HirschE HjortA M HoffmanG W HoffmannD J HofmanR S HollisB HuangH Z HuangT J HumanicL HuoG IgoA IordanovaP JacobsW W JacobsP JaklC JenaF JinC L JonesP G JonesJ JosephE G JuddS KabanaK KajimotoK KangJ KapitanK KauderD KeaneA KechechyanD KettlerD P KikolaJ KirylukA KisielS R KleinA G KnospeA KocoloskiD D KoetkeT KolleggerJ KonzerM KopytineI KoraltL KorolevaW KorschL KotchendaV KouchpilP KravtsovK KruegerM KrusL KumarP KurnadiM A C LamontJ M LandgrafS LaPointeJ LauretA LebedevR LednickyC-H LeeJ H LeeW LeightM J LevineC LiL LiN LiW LiX LiY LiZ LiG LinS J LindenbaumM A LisaF LiuH LiuJ LiuT LjubicicW J LlopeR S LongacreW A LoveY LuX LuoG L MaY G MaD P MahapatraR MajkaO I MalL K MangotraR ManweilerS MargetisC MarkertH MasuiH S MatisYu A MatulenkoD McDonaldT S McShaneA MeschaninR MilnerN G MinaevS MioduszewskiA MischkeM K MitrovskiB MohantyM M MondalB MorozovD A MorozovM G MunhozB K NandiC NattrassT K NayakJ M NelsonP K NetrakantiM J NgL V NogachS B NurushevG OdyniecA OgawaH OkadaV OkorokovD OlsonM PachrB S PageS K PalY PanditY PanebratsevT PawlakT PeitzmannV PerevoztchikovC PerkinsW PerytS C PhatakP PileM PlaninicM A PloskonJ PlutaD PlykuN PoljakA M PoskanzerB V K S PotukuchiC B PowellD PrindleC PruneauN K PruthiP R PujahariJ PutschkeH QiuR RaniwalaS RaniwalaR L RayR RedwineR ReedH G RitterJ B RobertsO V RogachevskiyJ L RomeroA RoseC RoyL RuanR SahooS SakaiI SakrejdaT SakumaS SalurJ SandweissE SangalineJ SchambachR P ScharenbergN SchmitzT R SchusterJ SeeleJ SegerI SelyuzhenkovP SeybothE ShahalievM ShaoM SharmaS S ShiE P SichtermannF SimonR N SingarajuM J SkobyN SmirnovP SorensenJ SowinskiH M SpinkaB SrivastavaT D S StanislausD StaszakJ R StevensR StockM StrikhanovB StringfellowA A P SuaideM C SuarezN L SubbaM SumberaX M SunY SunZ SunB SurrowD N SviridaT J M SymonsA Szanto de ToledoJ TakahashiA H TangZ TangL H TariniT TarnowskyD TheinJ H ThomasJ TianA R TimminsS TimoshenkoD TlustyM TokarevT A TrainorV N TramS TrentalangeR E TribbleO D TsaiJ UleryT UllrichD G UnderwoodG Van BurenM van LeeuwenG van NieuwenhuizenJ A Vanfossen JrR VarmaG M S VasconcelosA N VasilievF VidebaekY P ViyogiS VokalS A VoloshinM WadaM WalkerF WangG WangH WangJ S WangQ WangX L WangY WangG WebbJ C WebbG D WestfallC Whitten JrH WiemanE WingfieldS W WissinkR WittY WuW XieH XuN XuQ H XuW XuY XuZ XuL XueY YangP YepesK YipI-K YooQ YueM ZawiszaH ZbroszczykW ZhanJ ZhangS ZhangW M ZhangX P ZhangY ZhangZ P ZhangJ ZhaoC ZhongJ ZhouW ZhouX ZhuY H ZhuR ZoulkarneevY Zoulkarneeva
Free article

Observation of an antimatter hypernucleus

STAR Collaboration et al. Science. .
Free article

Abstract

Nuclear collisions recreate conditions in the universe microseconds after the Big Bang. Only a very small fraction of the emitted fragments are light nuclei, but these states are of fundamental interest. We report the observation of antihypertritons--comprising an antiproton, an antineutron, and an antilambda hyperon--produced by colliding gold nuclei at high energy. Our analysis yields 70 +/- 17 antihypertritons ((Lambda)(3)-H) and 157 +/- 30 hypertritons (Lambda3H). The measured yields of Lambda3H ((Lambda)(3)-H) and 3He (3He) are similar, suggesting an equilibrium in coordinate and momentum space populations of up, down, and strange quarks and antiquarks, unlike the pattern observed at lower collision energies. The production and properties of antinuclei, and of nuclei containing strange quarks, have implications spanning nuclear and particle physics, astrophysics, and cosmology.

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