6533b86efe1ef96bd12cc689
RESEARCH PRODUCT
Evidence for narrow Δ0(1232) states in the 12 C(e,e'pπ−}11 C Reaction
J.m. FriedrichM. O. DistlerA. KozlovM. WeisM. KahrauU. MüllerM. DingDaniela RoheS. DerberN. ClawiterR. NeuhausenS. WolfSimon ŠIrcaK. W. KrygierD. BosnarTh. PospischilP. JenneweinP. BartschD. BaumannR. BöhmI. EwaldG. RosnerA. WagnerKlemen BohincJ. BermuthM. PotokarM. KussA. EbbesM. KohlThomas WalcherP. MerleA. LiesenfeldH. SchmiedenJ.m. FriedrichHarald Merkelsubject
Nuclear physicsPhysicsNuclear and High Energy PhysicsFull width at half maximumSpectrometerHadronNuclear fusionGround stateMicrotronExcitationSpectral linedescription
The reaction 12C(e,e'Δ0)11C →12C(e,e'pπ−)11C was investigated at the Mainz Microtron MAMI in a triple coincidence measurement using the three spectrometer setup of the A1 Collaboration. The good missing mass resolution of σm= 0.27 MeV/c2 allowed to select the events belonging to the ground state of 11C. Cutting on these events the excitation energy spectra of 12CΔ0 show evidence for two peaks of about 4 MeV width (FWHM) at 282 MeV and 296 MeV with a significance of about 4.5 standard deviations. The peaks are interpreted in a simple weak coupling model as bound Δ0 states in 12CΔ0.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-03-01 | The European Physical Journal A |