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Photoproduction of meson pairs: First measurement of the polarization observable I^s

Authors :
Gutz, E.
Sokhoyan, V.
van Pee, H.
Anisovich, A. V.
Bacelar, J. C. S.
Bantes, B.
Bartholomy, O.
Bayadilov, D.
Beck, R.
Beloglazov, Yu.
Castelijns, R.
Crede, V.
Dutz, H.
Elsner, D.
Ewald, R.
Frommberger, F.
Fuchs, M.
Funke, Ch.
Gregor, R.
Gridnev, A.
Hillert, W.
Hoffmeister, Ph.
Horn, I.
Jaegle, I.
Junkersfeld, J.
Kalinowsky, H.
Kammer, S.
Kleber, V.
Klein, Frank
Klein, Friedrich
Klempt, E.
Kotulla, M.
Krusche, B.
Lang, M.
Loehner, H.
Lopatin, I.
Lugert, S.
Menze, D.
Mertens, T.
Messchendorp, J. G.
Metag, V.
Nanova, M.
Nikonov, V.
Novinski, D.
Novotny, R.
Ostrick, M.
Pant, L.
Pfeiffer, M.
Piontek, D.
Roberts, W.
Roy, A.
Sarantsev, A.
Schadmand, S.
Schmidt, Ch.
Schmieden, H.
Schoch, B.
Shende, S.
Suele, A.
Sumachev, V.
Szczepanek, T.
Thiel, A.
Thoma, U.
Trnka, D.
Varma, R.
Walther, D.
Weinheimer, Ch.
Wendel, Ch.
Source :
Phys.Lett.B687:11-15,2010
Publication Year :
2009

Abstract

The polarization observable I^s, a feature exclusive to the acoplanar kinematics of multi-meson final states produced via linearly polarized photons, has been measured for the first time. Results for the reaction g p -> p pi0 eta are presented for incoming photon energies between 970 MeV and 1650 MeV along with the beam asymmetry I^c. The comparably large asymmetries demonstrate a high sensitivity of I^s to the dynamics of the reaction. Fits using Bonn-Gatchina partial wave analysis demonstrate that the new polarization observables carry significant information on the contributing partial waves.<br />Comment: 11 pages, 6 figures, v2 to appear in Phys. Lett. B

Subjects

Subjects :
Nuclear Experiment

Details

Database :
arXiv
Journal :
Phys.Lett.B687:11-15,2010
Publication Type :
Report
Accession number :
edsarx.0912.2632
Document Type :
Working Paper
Full Text :
https://doi.org/10.1016/j.physletb.2010.02.076
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