6533b7dbfe1ef96bd1270ac9
RESEARCH PRODUCT
Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment
D. H. ZhangM. HiroseHitoshi TakahashiTakeshi KoikeShoichi HasegawaW. S. JungMegumi NarukiMegumi NarukiR. KiuchiYuki FujikawaM. IchikawaE. UmezakiH. KanauchiS. AshikagaS. AshikagaA. T. MoeJae-yong LeeHiroki ItoKazuma NakazawaYuji IshikawaT. L. MaKiyoshi TanidaMyint Kyaw SoeManami FujitaS. H. HwangY. ToyamaK. InabaYoko EndoShin Hyung KimM. MinakawaMifuyu UkaiY. C. HanSeongbae YangTadayuki TakahashiYoshiro TakahashiD. NakashimaRyotaro HondaTakeshi O. YamamotoK. OueY. NagaseM. H. KimToyoki WatabeKhin Than TintHiroyuki SakoShuhei HayakawaShuhei HayakawaS. Y. RyuS. Y. MatsumotoShunsuke KanatsukiHidetaka KobayashiManami NakagawaT. AkaishiC. S. YoonMasaharu IeiriKotaro ShirotoriK. ItoTakayoshi KawaiSusumu SatoA. KoshikawaYuya AkazawaR. GotoZ. ZhangS. KinbaraS. KinbaraK. WatanabeY. OguraS. OzawaAye Moh Moh TheintJunya YoshidaN. FujiokaJ. K. AhnA. IskendirS. BleserA. N. L. NyawT. NanamuraT. NanamuraT. HashimotoK. HoshinoJ. Y. SohnManabu MoritsuKenichi ImaiK. N. SuzukiK. N. SuzukiK. HicksS. HoshinoT. TakedaY. SasakiJ. W. LeeYudai IchikawaM. OhashiE. HayataYoshihiro SatoHirokazu TamuraHirokazu TamuraM. M. SoeKoji MiwaB. BassalleckA. KasagiKenji HosomiT. J. MoonHitoshi SugimuraT. HayakawaMasahiro YoshimotoHiroyuki EkawaHiroyuki EkawaY. NakadaK. AgariJosef PochodzallaErina HiroseKazuya KobayashiF. Schuppsubject
PhysicsParticle physics010308 nuclear & particles physicsBinding energyNuclear TheoryHyperonGeneral Physics and AstronomyFOS: Physical sciencesHypernucleusLambda01 natural sciences5300103 physical sciencesProduction (computer science)ddc:530J-PARCNuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentNuclear Experimentdescription
A double-$\Lambda$ hypernucleus, ${}_{\Lambda\Lambda}\mathrm{Be}$, was observed by the J-PARC E07 collaboration in nuclear emulsions tagged by the $(K^{-},K^{+})$ reaction. This event was interpreted as a production and decay of $ {}_{\Lambda\Lambda}^{\;10}\mathrm{Be}$, ${}_{\Lambda\Lambda}^{\;11}\mathrm{Be}$, or ${}_{\Lambda\Lambda}^{\;12}\mathrm{Be}^{*}$ via $\Xi^{-}$ capture in ${}^{16}\mathrm{O}$. By assuming the capture in the atomic 3D state, the binding energy of two $\Lambda$ hyperons$\,$($B_{\Lambda\Lambda}$) of these double-$\Lambda$ hypernuclei are obtained to be $15.05 \pm 0.11\,\mathrm{MeV}$, $19.07 \pm 0.11\,\mathrm{MeV}$, and $13.68 \pm 0.11\,\mathrm{MeV}$, respectively. Based on the kinematic fitting, ${}_{\Lambda\Lambda}^{\;11}\mathrm{Be}$ is the most likely explanation for the observed event.
year | journal | country | edition | language |
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2018-11-19 |