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18 April 2024

» pubmed » pmid15698070

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Neutral-pion photoproduction off protons in the energy range 0.3 GeV<E(gamma)<3 GeV
O Bartholomy ; V Credé ; H van Pee ; A V Anisovich ; G Anton ; R Bantes ; Yu Beloglazov ; R Bogendörfer ; R Castelijns ; A Ehmanns ; J Ernst ; I Fabry ; H Flemming ; A Fösel ; H Freiesleben ; M Fuchs ; Ch Funke ; R Gothe ; A Gridnev ; E Gutz ; S K Höffgen ; I Horn ; J Hössl ; R Joosten ; J Junkersfeld ; H Kalinowsky ; F Klein ; E Klempt ; H Koch ; M Konrad ; B Kopf ; B Krusche ; J Langheinrich ; H Löhner ; I Lopatin ; J Lotz ; H Matthäy ; D Menze ; J Messchendorp ; C Morales ; D Novinski ; M Ostrick ; A Radkov ; J Reinnarth ; A V Sarantsev ; S Schadm ; Ch Schmidt ; H Schmieden ; B Schoch ; G Suft ; V Sumachev ; T Szczepanek ; U Thoma ; D Walther ; Ch Weinheimer ; ;
Date:	14 Jan 2005
Journal:	Phys Rev Lett, 94 (1), 012003
Abstract:	Single pi(0) photoproduction has been studied with the CB-ELSA experiment at Bonn using tagged photon energies between 0.3 and 3.0 GeV. The experimental setup covers a very large solid angle of approximately 98% of 4pi. Differential cross sections dsigma/dOmega have been measured. Complicated structures in the angular distributions indicate a variety of different resonances being produced in the s channel intermediate state gammap-->N()(Delta())-->ppi(0). A combined analysis including the data presented in this letter along with other data sets reveals contributions from known resonances and evidence for a new resonance N(2070)D15.
Source:	PubMed, pmid15698070
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