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http://hdl.handle.net/2445/130863
Title: | Search for the decay D0 → γγ and measurement of the branching fraction for D0 → π0π0 |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Mesons (Física nuclear) Particle physics Experiments Mesons (Nuclear physics) |
Issue Date: | 18-May-2012 |
Publisher: | American Physical Society |
Abstract: | We search for the rare decay of the D 0 meson to two photons, D 0 → γ γ , and present a measurement of the branching fraction for a D 0 meson decaying to two neutral pions, B ( D 0 → π 0 π 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 → γ γ ) < 2.2 × 10 − 6 , at 90% confidence level. This limit improves on the existing limit by an order of magnitude. We also find B ( D 0 → π 0 π 0 ) = ( 8.4 ± 0.1 ± 0.4 ± 0.3 ) × 10 − 4 . |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.85.091107 |
It is part of: | Physical Review D, 2012, vol. 85, num. 9, p. 091107(R) |
URI: | http://hdl.handle.net/2445/130863 |
Related resource: | https://doi.org/10.1103/PhysRevD.85.091107 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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