Observation of a chi_{c2}' candidate in gamma gamma-->D Dbar production in Belle

Abstract

We report on a search for the production of new resonance states in the process gamma gamma-->D Dbar. A candidate C-even charmonium state is observed in the vicinity of 3.93 GeV/c^2. The production rate and the angular distribution in the gamma gamma center-of-mass frame suggest that this state is the previously unobserved chi_{c2}', the 2 ^3P_2 charmonium state.

arXiv comment7 pages, 5 figures, submitted to QCD2005 in Montpellier, France, PIC2005 in Prague, Czech Republic and the HEP2005 International Europhysics Conference in Lisbon, Portugal