Quasifree photoproduction of eta mesons off the neutron

I Jaegle; T Mertens; A V Anisovich; J C S Bacelar; B Bantes; O Bartholomy; D Bayadilov; R Beck; Y A Beloglazov; R Castelijns; V Crede; H Dutz; A Ehmanns; D Elsner; K Essig; R Ewald; I Fabry; M Fuchs; Ch Funke; R Gothe; R Gregor; A B Gridnev; E Gutz; S Höffgen; P Hoffmeister; I Horn; J Junkersfeld; H Kalinowsky; S Kammer; V Kleber; Frank Klein; Friedrich Klein; E Klempt; M Konrad; M Kotulla; B Krusche; M Lang; J Langheinrich; H Löhner; I V Lopatin; J Lotz; S Lugert; D Menze; J G Messchendorp; V Metag; C Morales; M Nanova; V A Nikonov; D Novinski; R Novotny; M Ostrick; L M Pant; H van Pee; M Pfeiffer; A Radkov; A Roy; A V Sarantsev; S Schadmand; C Schmidt; H Schmieden; B Schoch; S V Shende; V Sokhoyan; A Süle; V V Sumachev; T Szczepanek; U Thoma; D Trnka; R Varma; D Walther; Ch Weinheimer; Ch Wendel; CBELSA/TAPS Collaboration

doi:10.1103/PhysRevLett.100.252002

Quasifree photoproduction of eta mesons off the neutron

Phys Rev Lett. 2008 Jun 27;100(25):252002. doi: 10.1103/PhysRevLett.100.252002. Epub 2008 Jun 26.

Authors

I Jaegle¹, T Mertens, A V Anisovich, J C S Bacelar, B Bantes, O Bartholomy, D Bayadilov, R Beck, Y A Beloglazov, R Castelijns, V Crede, H Dutz, A Ehmanns, D Elsner, K Essig, R Ewald, I Fabry, M Fuchs, Ch Funke, R Gothe, R Gregor, A B Gridnev, E Gutz, S Höffgen, P Hoffmeister, I Horn, J Junkersfeld, H Kalinowsky, S Kammer, V Kleber, Frank Klein, Friedrich Klein, E Klempt, M Konrad, M Kotulla, B Krusche, M Lang, J Langheinrich, H Löhner, I V Lopatin, J Lotz, S Lugert, D Menze, J G Messchendorp, V Metag, C Morales, M Nanova, V A Nikonov, D Novinski, R Novotny, M Ostrick, L M Pant, H van Pee, M Pfeiffer, A Radkov, A Roy, A V Sarantsev, S Schadmand, C Schmidt, H Schmieden, B Schoch, S V Shende, V Sokhoyan, A Süle, V V Sumachev, T Szczepanek, U Thoma, D Trnka, R Varma, D Walther, Ch Weinheimer, Ch Wendel; CBELSA/TAPS Collaboration

Affiliation

¹ Department Physik, Universität Basel, Switzerland.

PMID: 18643655
DOI: 10.1103/PhysRevLett.100.252002

Abstract

Quasifree photoproduction of eta mesons off nucleons bound in the deuteron has been measured with the CBELSA/TAPS detector for incident photon energies up to 2.5 GeV at the Bonn ELSA accelerator. The eta mesons have been detected in coincidence with recoil protons and recoil neutrons, which allows a detailed comparison of the quasifree n(gamma,eta)n and p(gamma,eta)p reactions. The excitation function for eta production off the neutron shows a pronounced bumplike structure at W=1.68 GeV (E{gamma} approximately 1 GeV), which is absent for the proton.