%0 Journal Article
%T Search for the decay D-0 -> gamma gamma and measurement of the branching fraction for D-0 -> pi(0)pi(0)
%A BABAR Collaboration (Lees, J. P. et al
%A Lopez-March, N.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%J Physical Review D
%D 2012
%V 85
%N 9
%I Amer Physical Soc
%@ 1550-7998
%G English
%F BABARCollaborationLees_etal2012
%O WOS:000304255300002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1037), last updated on Thu, 14 Jun 2012 12:09:51 +0000
%X We search for the rare decay of the D-0 meson to two photons, D-0 -> gamma gamma, and present a measurement of the branching fraction for a D-0 meson decaying to two neutral pions, B(D-0 -> pi(0)pi(0)). The data sample analyzed corresponds to an integrated luminosity of 470.5 fb(-1) collected by the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We place an upper limit on the branching fraction, B(D-0 -> gamma gamma) < 2.2 x 10(-6), at 90% confidence level. This limit improves on the existing limit by an order of magnitude. We also find B(D-0 -> pi(0)pi(0)) = (8.4 +/- 0.1 +/- 0.4 +/- 0.3 +/-) x 10(-4).
%R 10.1103/PhysRevD.85.091107
%U http://arxiv.org/abs/arXiv:1110.6480
%U https://doi.org/10.1103/PhysRevD.85.091107
%P 091107-8pp