Photoproduction of η and η' mesons off protons

Höffgen, S K

doi:10.1103/physrevc.80.055202

Photoproduction of η and η' mesons off protons

Date Issued

2009-01-01

Author(s)

Credé, V

Bartholomy, O

Anisovich, A V

Anton, G

Bantes, R

Beloglazov, Yu

Bogendörfer, R

Castelijns, R

Ehmanns, A

Ernst, J

Fabry, I

Flemming, H

Fösel, A

Freiesleben, H

Fuchs, M

Funke, Ch

Gothe, R

Gridnev, A

Gutz, E

Höffgen, S K

Horn, I

Hössl, J

Joosten, R

Junkersfeld, J

Kalinowsky, H

Klein, F

Klempt, E

Koch, H

Konrad, M

Kopf, B

Krusche, B

Langheinrich, J

Löhner, H

Lopatin, I

Lotz, J

Matthäy, H

Menze, D

Messchendorp, J

Morales, C

Novinski, D

Ostrick, M

van Pee, H

Radkov, A

Reinnarth, J

Sarantsev, A V

Schadmand, S

Schmidt, Ch

Schmieden, H

Schoch, B

Suft, G

Sumachev, V

Szczepanek, T

Thoma, U

Walther, D

Weinheimer, Ch

CB-ELSA,

DOI

10.1103/physrevc.80.055202

Abstract

Total and differential cross sections for eta and eta(`)photoproduction off the proton have been determined with the CBELSA/TAPS detector for photon energies between 0.85 and 2.55 GeV. The eta mesons are detected in their two neutral decay modes, eta ->gamma gamma and eta -> 3 pi(0)-> 6 gamma, and for the first time, cover the full angular range in cos theta(c.m.) of the eta meson. These new eta photoproduction data are consistent with the earlier CB-ELSA results. The eta(`) mesons are observed in their neutral decay to pi(0)pi(0)eta -> 6 gamma and also extend the coverage in angular range.