PRELIMINARY RESULTS ON eta ' PHOTOPRODUCTION AT GRAAL RID B-7657-2011 RID B-1239-2012 RID A-2439-2012

Author:

Manganaro, M.  Bellini, V.  Bocquet, J. P.  Casano, L.  D'Angelo, A.  Di Salvo, R.  Fantini, A.  Franco, D.  Gervino, G.  Ghio, F.  Giardina, G.  Giusa, A.  Girolami, B.  Ignatov, A. S.  Lapik, A. M.  Sandri, P. Levi  Lleres, A.  Mammoliti, F.  Mandaglio, G.  Moricciani, D.  Mushkarenkov, A. N.  Nedorezov, V. G.  Randieri, C.  Rebreyend, D.  Rudnev, N. V.  Russo, G.  Schaerf, C.  Sperduto, M. L.  Sutera, M. C.  Turinge, A.  Vegna, V.  

Journal:

INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS

Issue Date:

2010

Abstract(summary):

The gamma p -> eta'p reaction was studied near the threshold, in the 1.44 GeV > E(gamma) < 1.55GeV energy range with the tagged photons of the former GRAAL experiment. The two neutral decays gamma gamma(Gamma(i)/Gamma = 2.10 +/- 0.12%) and pi(0)pi(0)eta(Gamma(i)/Gamma = 20.7 +/- 1.2%) were analized and preliminary results of the beam asymmetry were extracted together with the invariant masses.

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