Search for the decay D[superscript 0]→γγ and measurement of the branching fraction for D[superscript 0]→π[superscript 0]π[superscript 0]
Name
Lees-2012-and measurement of the branching fraction for.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Date Issued
May 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
J. P. Lees et al. (The BABAR Collaboration). "Search for the decay D[superscript 0]→γγ and measurement of the branching fraction for D[superscript 0]→π[superscript 0]π[superscript 0]" Physical Review D 85, 091107(R) (2012). © 2012 American Physical Society
Version
Final published version
Abstract
We search for the rare decay of the D[superscript 0] meson to two photons, D[superscript 0]→γγ, and present a measurement of the branching fraction for a D[superscript 0] meson decaying to two neutral pions, B(D[superscript 0]→π[superscript 0]π[superscript 0]). The data sample analyzed corresponds to an integrated luminosity of 470.5 fb[superscript -1] collected by the BABAR detector at the PEP-II asymmetric-energy e[superscript +]e[superscript -] collider at SLAC. We place an upper limit on the branching fraction, B(D[superscript 0]→γγ)<2.2×10[superscript -6], at 90% confidence level. This limit improves on the existing limit by an order of magnitude. We also find B(D[superscript 0]→π[superscript 0]π[superscript 0])=(8.4±0.1±0.4±0.3)×10[superscript -4].
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.85.091107
