6533b856fe1ef96bd12b2ff2
RESEARCH PRODUCT
Transparency ratio in γA→η′A′ and the in-medium η′ width
B. KruscheI. HornV. MetagA. RadkovS. LugertO. BartholomyD. MenzeAngels RamosEberhard KlemptS. HöffgenK.-t. BrinkmannT. SzczepanekCh. WendelI. JaegleA. SüleV. V. SumachevJ. JunkersfeldK. EssigC. MoralesM. FuchsH. DutzFrank KleinYu. A. BeloglazovA. EhmannsE. GutzCh. FunkeM. KonradLalit Mohan PantM. OstrickH. KalinowskyM. PfeifferFriedrich KleinK. MakonyiR. EwaldI. V. LopatinT. MertensHerbert LöhnerH. Van PeeV. CredeB. KopfD. TrnkaJ. LangheinrichJ. G. MesschendorpD. ElsnerU. ThomaAnkhi RoyR. W. NovotnyJ. LotzD. WaltherPh. HoffmeisterB. SchochCh. SchmidtEulogi OsetH. SchmiedenD. E. BayadilovA. B. GridnevMariana NanovaI. FabryS. SchadmandR. GregorR. Varmasubject
PhysicsNuclear and High Energy PhysicsPhotonProtonMeson010308 nuclear & particles physicsScatteringNuclear TheoryNiobiumchemistry.chemical_elementRest frame7. Clean energy01 natural sciencesMomentumNuclear physicsCross section (physics)chemistry0103 physical sciencesHigh Energy Physics::ExperimentAtomic physicsNuclear Experiment010306 general physicsdescription
Abstract The photoproduction of η ′ -mesons off different nuclei has been measured with the CBELSA/TAPS detector system for incident photon energies between 1500–2200 MeV. The transparency ratio has been deduced and compared to theoretical calculations describing the propagation of η ′ -mesons in nuclei. The comparison indicates a width of the η ′ -meson of the order of Γ = 15 – 25 MeV at ρ = ρ 0 for an average momentum p η ′ = 1050 MeV / c , at which the η ′ -meson is produced in the nuclear rest frame. The inelastic η ′ N cross section is estimated to be 3–10 mb. Parameterizing the photoproduction cross section of η ′ -mesons by σ ( A ) = σ 0 A α , a value of α = 0.84 ± 0.03 has been deduced.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-04-01 | Physics Letters B |