6533b7d6fe1ef96bd1266e78

RESEARCH PRODUCT

New states as observed by the Crystal Barrel experiment

I. AugustinC. AmslerI. AugustinC.a. BakerB.m. BarnettC.j. BattyK. BeuchertP. BirienJ. BistirlichP. BlümR. BossinghamH. BossyK. BrauneJ. BroseD.v. BuggM. BurchellT. CaseS.v. ChungA. CooperK.m. CroweH.p. DietzS.v. DombrowskiM. DoserW. DünnweberD. EngelhardtM. EnglertM.a. FaesslerC. FelixG. FolgerR. HackmannR.p. HaddockF.h. HeinsiusN.p. HesseyP. HidasP. IllingerD. JamnikZ. JávorfiH. KalinowskyB. KämmleT. KielJ. KisielE. KlemptM. KobelH. KochC. KoloK. KönigsmannM. KunzeR. LanduaJ. LüdemannH. MatthaeyM. MerkelJ.p. MerloC.a. MeyerU. Meyer-berkhoutL. MontanetA. NobleK. PetersG. PinterS. RavndalA.h. SanjariE. SchäferB. SchmidP. SchmidtS. SpanierC. StraßburgerU. StrohbuschM. SuffertD. UrnerC. VölckerF. WalterD. WaltherU. WiednerN. WinterJ. ZollČ. Zupančič

subject

Nuclear physicsCrystalPhysicsNuclear and High Energy PhysicsBarrelAnnihilationProtoniumBranching fractionIsoscalarResonanceState (functional analysis)Atomic physics

description

Abstract The Crystal Barrel Detector has been in operation since October 1989. Results on the analysis of the annihilation of protonium at rest into three pseudoscalars is presented. The π 0 π 0 π 0 final state confirms the existence of ƒ 2 (1520)→π 0 π 0 . In the ηη system of the π 0 ηη final state an isoscalar J PC = 0 ++ resonance with a mass of 1560 MeV/c 2 and a width of 245 MeV/c 2 is observed. The identification with ƒ 0 (1590) is doubtful since the ηη' decay is not observed with the corresponding strength. Our analysis yields an upper limit for the relative branching ratio BR(ƒ 0 (1560)→ηη') BR(ƒ 0 (1560)→ηη) .

yearjournalcountryeditionlanguage
1993-06-01Nuclear Physics A
https://doi.org/10.1016/0375-9474(93)90378-b