%0 Journal Article
%T Observation of the chi(c2)(2P) meson in the reaction gamma gamma -> D(D)over-bar at BABAR
%A BABAR Collaboration (Aubert, B. et al
%A Azzolini, V.
%A Lopez-March, N.
%A Martinez-Vidal, F.
%A Milanes, D. A.
%A Oyanguren, A.
%J Physical Review D
%D 2010
%V 81
%N 9
%I Amer Physical Soc
%@ 1550-7998
%G English
%F BABARCollaborationAubert_etal2010
%O ISI:000278145100007
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=437), last updated on Tue, 22 Mar 2011 14:24:12 +0000
%X A search for the Z(3930) resonance in gamma gamma production of the D (D) over bar system has been performed using a data sample corresponding to an integrated luminosity of 384 fb(-1) recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The D (D) over bar invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8 sigma. We determine mass and width values of (3926.7 +/- 2.7 +/- 1.1) MeV/c(2) and (21.3 +/- 6.8 +/- 3.6) MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (J(PC) = 2(++)); therefore we identify the Z(3930) state as the chi(c2)(2P) meson. The value of the partial width Gamma(gamma gamma) x B(Z(3930) -> D (D) over bar) is found to be (0.24 +/- 0.05 +/- 0.04) keV.
%R 10.1103/PhysRevD.81.092003
%U http://arxiv.org/abs/1002.0281
%U https://doi.org/10.1103/PhysRevD.81.092003
%P 092003-16pp