6533b856fe1ef96bd12b2f4f
RESEARCH PRODUCT
P- versus S-wave at rest in LH2
C. FelixA. CooperF. H. HeinsiusHerbert KochM. SuffertC. VölckerA. H. SanjariMarcel KunzeD. UrnerPàl HidasČ. ZupančičG. FolgerMichael KobelH. KalinowskyC. A. MeyerBernhard SchmidD. WaltherJ. ZollEberhard KlemptNigel HesseyJames A. BistirlichJ. BroseH. P. DietzJ. KisielS. SpanierA. NobleR. LanduaT. KielU. Meyer-berkhoutE. SchäferH. BossyG. PinterM. EnglertC. StraβburgerL. MontanetB. KämmleU. StrohbuschH. MatthaeyS. Von DombrowskiP. SchmidtW. DünnweberM. MerkelP. IllingerK. BrauneJ. LüdemannC.j. BattyMark J. BurchellS. RavndalClaude AmslerJ. P. MerloK. KönigsmannK. BeuchertN. WinterR. HackmannD. JamnikP. BlümD. EngelhardtD.v. BuggI. AugustinK. PetersR. P. HaddockU. WiednerMichael DoserC.a. BakerM. A. FaesslerF. WalterR. BossinghamKenneth M. CroweP. BirienT. CaseB. M. BarnettC. Kolosubject
PhysicsNuclear and High Energy PhysicsAngular momentumAnnihilationAntiprotonBranching fractionS-waveAtomAtomic physicsdescription
Abstract The annihilation p p →π 0 π 0 was measured for antiprotons stopped in liquid hydrogen (LH2). This reaction is only allowed from odd angular momentum states of the p p - atom . The resulting branching ratio BR ( p p →π 0 π 0 ) LH 2 =(6.93±0.22 stat ±0.37 syst )×10 −4 , combined with a previous measurement of the branching ratio BR ( p p →π + π − ) 2 P in gas from the 2P-state of p p suggests a fraction of P-wave annihilation in LH2 of (28.8±3.5)%, much larger than the values obtained from other annihilation channels. A method of reconciling the contradictory results is discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-12-01 | Physics Letters B |