Updated search for the flavor-changing neutral-current decay D[superscript 0]-->mu+mu- in pp[over-bar] collisions at [sqrt]s=1.96 TeV

• Main Authors: Bauer, Gerry P. (Contributor), Gomez-Ceballos, Guillelmo (Contributor), Goncharov, Maxim (Contributor), Makhoul, K. (Contributor), Paus, Christoph M. E. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2011-05-10T14:38:00Z.
• Subjects: Article
• Online Access: Get fulltext

We report on a search for the flavor-changing neutral-current decay D0-->mu+mu- in pp[over-bar] collisions at [sqrt]s=1.96  TeV using 360  pb[superscript -1] of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. A displaced vertex trigger selects long-lived D0 candidates in the mu+mu-, pi+pi-, and K-pi+ decay modes. We use the Cabibbo-favored D0-->K-pi+ channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D0-->pi+pi- channel for normalization. We set an upper limit on the branching fraction B(D0-->mu+mu-)<2.1×10-7(3.0×10-7) at the 90% (95%) confidence level.
United States. Dept. of Energy
Alfred P. Sloan Foundation
National Science Foundation (U.S.)