TY  - JOUR
AU  - BABAR Collaboration (Aubert, B. et al
AU  - Azzolini, V.
AU  - Lopez-March, N.
AU  - Martinez-Vidal, F.
AU  - Milanes, D. A.
AU  - Oyanguren, A.
PY  - 2010
DA  - 2010//
TI  - Observation of the chi(c2)(2P) meson in the reaction gamma gamma -> D(D)over-bar at BABAR
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 092003
EP  - 16pp
VL  - 81
IS  - 9
PB  - Amer Physical Soc
AB  - 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.
SN  - 1550-7998
UR  - http://arxiv.org/abs/1002.0281
UR  - https://doi.org/10.1103/PhysRevD.81.092003
DO  - 10.1103/PhysRevD.81.092003
LA  - English
N1  - ISI:000278145100007
ID  - BABARCollaborationAubert_etal2010
ER  -