Observation of an Antimatter Hypernucleus
B. I. AbelevUniversity of Illinois at Chicago, Chicago, United StatesM. M. AggarwalPanjab University, Chandigarh, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata, IndiaA. V. AlakhverdyantsJoint Institute for Nuclear Research, Dubna, RussiaI. AlekseevB. D. AndersonKent State University, Kent, United StatesD. ArkhipkinBrookhaven National Laboratory, Upton, United StatesG. S. AverichevJoint Institute for Nuclear Research, Dubna, RussiaJ. BalewskiMassachusetts Institute of Technology, Cambridge, United StatesL. S. BarnbyUniversity of Birmingham, Birmingham, United KingdomS. BaumgartYale University, New Haven, United StatesD. R. BeavisBrookhaven National Laboratory, Upton, United StatesR. BellwiedWayne State University, Detroit, United StatesM. BetancourtMassachusetts Institute of Technology, Cambridge, United StatesR. R. BettsUniversity of Illinois at Chicago, Chicago, United StatesA. BhasinUniversity of Jammu, Jammu, IndiaA. K. BhatiPanjab University, Chandigarh, IndiaH. BichselUniversity of Washington, Seattle, United StatesJ. BielčíkCzech Academy of Sciences, Prague, CzechiaJ. BielčíkováCzech Academy of Sciences, Prague, CzechiaB. BiritzUniversity of California, Los Angeles, Los Angeles, United StatesL. C. BlandBrookhaven National Laboratory, Upton, United StatesB. E. BonnerRice University, Houston, United StatesJ. BouchetKent State University, Kent, United StatesE. BraidotUtrecht University, Utrecht, The NetherlandsA. V. BrandinMoscow Engineering Physics Institute, Moscow, RussiaA. BridgemanArgonne National Laboratory, Lemont, United StatesE. BrunaYale University, New Haven, United StatesS. BueltmannOld Dominion University, Norfolk, United StatesI. BunzarovJoint Institute for Nuclear Research, Dubna, RussiaT. P. BurtonUniversity of Birmingham, Birmingham, United KingdomX. Z. CaiChinese Academy of Sciences, Beijing, ChinaH. CainesYale University, New Haven, United StatesM. CalderónUniversity of California, Davis, Davis, United StatesO. CatuYale University, New Haven, United StatesD. CebraUniversity of California, Davis, Davis, United StatesR. CendejasUniversity of California, Los Angeles, Los Angeles, United StatesM. C. CervantesTexas A&M University, College Station, United StatesZ. ChajęckiUniversidade Estadual de Campinas (UNICAMP), Campinas, BrazilP. ChaloupkaCzech Academy of Sciences, Prague, CzechiaS. ChattopadhyayVariable Energy Cyclotron Centre, Kolkata, IndiaH. F. ChenLawrence Berkeley National Laboratory, Berkeley, United StatesC. H. ChengChinese Academy of Sciences, Beijing, ChinaJ. Y. ChenCentral China Normal University, Wuhan, ChinaJ. ChengTsinghua University, Beijing, ChinaM. CherneyCreighton University, Omaha, United StatesA. ChikanianYale University, New Haven, United StatesK. ChoiPusan National University, Busan, South KoreaW. ChristieBrookhaven National Laboratory, Upton, United StatesP. ChungCzech Academy of Sciences, Prague, CzechiaR. F. ClarkeTexas A&M University, College Station, United StatesM. J. M. CodringtonTexas A&M University, College Station, United StatesR. CorlissMassachusetts Institute of Technology, Cambridge, United StatesJ. G. CramerUniversity of Washington, Seattle, United StatesH. J. CrawfordUniversity of California, Berkeley, Berkeley, United StatesD. DasInstitute of Physics, Bhubaneshwar, Bhubaneswar, IndiaS. DashInstitute of Physics, Bhubaneshwar, Bhubaneswar, IndiaA. Davila LeyvaThe University of Texas at Austin, Austin, United StatesL. C. De SilvaWayne State University, Detroit, United StatesR. R. DebbeBrookhaven National Laboratory, Upton, United StatesT. G. DedovichJoint Institute for Nuclear Research, Dubna, RussiaM. DePhillipsBrookhaven National Laboratory, Upton, United StatesA. A. DerevschikovR. Derradi de SouzaUniversidade Estadual de Campinas (UNICAMP), Campinas, BrazilL. DidenkoBrookhaven National Laboratory, Upton, United StatesP. DjawothoTexas A&M University, College Station, United StatesS. DograUniversity of Jammu, Jammu, IndiaX. DongLawrence Berkeley National Laboratory, Berkeley, United StatesJ. L. DrachenbergTexas A&M University, College Station, United StatesJ. E. DraperUniversity of California, Davis, Davis, United StatesJ. C. DunlopBrookhaven National Laboratory, Upton, United StatesM. R. Dutta MazumdarVariable Energy Cyclotron Centre, Kolkata, IndiaL. G. EfimovJoint Institute for Nuclear Research, Dubna, RussiaE. ElhalhuliUniversity of Birmingham, Birmingham, United KingdomM. ElnimrWayne State University, Detroit, United StatesJ. EngelageUniversity of California, Berkeley, Berkeley, United StatesG. EppleyRice University, Houston, United StatesB. ErazmusM. EstienneL. EunPennsylvania State University, State College, United StatesO. EvdokimovUniversity of Illinois at Chicago, Chicago, United StatesP. FachiniBrookhaven National Laboratory, Upton, United StatesR. FatemiUniversity of Kentucky, Lexington, United StatesJ. FedorišinJoint Institute for Nuclear Research, Dubna, RussiaR. G. FerschUniversity of Kentucky, Lexington, United StatesP. FilipJoint Institute for Nuclear Research, Dubna, RussiaE. FinchYale University, New Haven, United StatesV. FineBrookhaven National Laboratory, Upton, United StatesY. FisyakBrookhaven National Laboratory, Upton, United StatesC. A. GagliardiTexas A&M University, College Station, United StatesD. R. GangadharanUniversity of California, Los Angeles, Los Angeles, United StatesM. S. GantiVariable Energy Cyclotron Centre, Kolkata, IndiaE. García-SolisUniversity of Illinois at Chicago, Chicago, United StatesA. GeromitsosF. J. M. GeurtsRice University, Houston, United StatesV. GhazikhanianUniversity of California, Los Angeles, Los Angeles, United StatesP. GhoshVariable Energy Cyclotron Centre, Kolkata, IndiaY. N. GorbunovCreighton University, Omaha, United StatesA. GordonBrookhaven National Laboratory, Upton, United StatesO. G. GrebenyukLawrence Berkeley National Laboratory, Berkeley, United States
2010en
ABI
Аннотация
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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