Measurement of the beam asymmetry Sigma in the forward direction for (gamma)over-right-arrowp -> p pi(0)
- Sparks, N.
- Crede, V.
- Anisovich, A. V.
- Bacelar, J. C. S.
- Bantes, R.
- Bartholomy, O.
- Bayadilov, D.
- Beck, R.
- Beloglazov, Y. A.
- Castelijns, R.
- Elsner, D.
- Ewald, R.
- Frommberger, F.
- Funke, Chr.
- Gregor, R.
- Gridnev, A.
- Gutz, E.
- Hillert, W.
- Hoffmeister, P.
- Jaegle, I.
- Junkersfeld, J.
- Kalinowsky, H.
- Kammer, S.
- Klein, Frank
- Klein, Friedrich
- Klempt, E.
- Kotulla, M.
- Krusche, B.
- Loehner, H.
- Lopatin, I. V.
- Lugert, S.
- Menze, D.
- Mertens, T.
- Messchendorp, J. G.
- Metag, V.
- Nanova, M.
- Nikonov, V. A.
- Novinski, D.
- Novotny, R.
- Ostrick, M.
- Pant, L. M.
- van Pee, H.
- Pfeiffer, M.
- Roy, A.
- Sarantsev, A. V.
- Schadmand, S.
- Schmidt, C.
- Schmieden, H.
- Schoch, B.
- Shende, S.
Publication date
June 2010
DOIAbstract
Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector for photon energies between 0.92 and 1.68 GeV at the electron stretcher accelerator ELSA. The beam asymmetry Sigma has been extracted for 115 degrees <theta(c.m.) <155 degrees of the pi(0) meson and for theta(c.m.) <60 degrees. The new beam-asymmetry data cover the very forward region, which extend previously published data for the same reaction by our collaboration and improve the world database for photon energies above 1.5 GeV. The angular dependence of Sigma shows overall good agreement with the SAID parametrization.</p
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