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Paper detail

First measurement of the circular beam asymmetry in the gamma p --> pi0 eta p reaction

The circular photon asymmetry for pi0 eta photoproduction on the proton was measured for the first time at the tagged photon facility of the MAMI C accelerator using the Crystal Ball/TAPS photon spectrometer. The experimental results are interpreted within a phenomenological isobar model that confirms the dominant role of the Delta(1700)D33 resonance. The measured asymmetry allows us to identify small contributions from positive-parity resonances via interference terms with the dominant D33 amplitude.

preprint2010arXivOpen access
V. L. KashevarovA. FixP. Aguar-BartoloméL. K. AkasoyJ. R. M. AnnandH. J. ArendsK. BantawaR. BeckV. BekrenevH. BerghäuserA. BraghieriD. BranfordW. J. BriscoeJ. BrudvikS. CherepnyaR. F. B. CodlingB. T. DemissieE. J. DownieP. DrexlerL. V. Fil'kovD. I. GlazierR. GregorD. HamiltonE. HeidD. HornidgeI. JaegleO. JahnT. C. JudeJ. D. KellieI. KeshelashviliR. KondratievM. KorolijaM. KotullaA. KoulbardisS. KruglovB. KruscheV. LisinK. LivingstonI. J. D. MacGregorY. MaghrbiD. M. ManleyM. Martinez-FabregateJ. C. McGeorgeE. F. McNicollD. MekterovicV. MetagS. MicanovicD. MiddletonA. MushkarenkovB. M. K. NefkensA. NikolaevR. NovotnyM. OstrickP. B. OtteB. OussenaP. PedroniF. PheronA. PolonskiS. N. PrakhovJ. RobinsonG. RosnerT. RostomyanS. SchumannM. H. SikoraD. SoberA. StarostinI. I. StakovskyI. M. SuarezI. SupekC. TarbertM. ThielA. ThomasM. UnverzagtD. P. WattsD. WerthmüllerI. ZamboniF. Zehr.
hep-exnucl-exnucl-th
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V. L. KashevarovA. FixP. Aguar-BartoloméL. K. AkasoyJ. R. M. AnnandH. J. ArendsK. BantawaR. BeckV. BekrenevH. BerghäuserA. BraghieriD. BranfordW. J. BriscoeJ. BrudvikS. CherepnyaR. F. B. CodlingB. T. DemissieE. J. DownieP. DrexlerL. V. Fil'kovD. I. GlazierR. GregorD. HamiltonE. HeidD. HornidgeI. JaegleO. JahnT. C. JudeJ. D. KellieI. KeshelashviliR. KondratievM. KorolijaM. KotullaA. KoulbardisS. KruglovB. KruscheV. LisinK. LivingstonI. J. D. MacGregorY. MaghrbiD. M. ManleyM. Martinez-FabregateJ. C. McGeorgeE. F. McNicollD. MekterovicV. MetagS. MicanovicD. MiddletonA. MushkarenkovB. M. K. NefkensA. NikolaevR. NovotnyM. OstrickP. B. OtteB. OussenaP. PedroniF. PheronA. PolonskiS. N. PrakhovJ. RobinsonG. RosnerT. RostomyanS. SchumannM. H. SikoraD. SoberA. StarostinI. I. StakovskyI. M. SuarezI. SupekC. TarbertM. ThielA. ThomasM. UnverzagtD. P. WattsD. WerthmüllerI. ZamboniF. Zehr.

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