We report on a search for the flavor-changing neutral-current
decay D0 --> mu+mu- in p anti-p collisions at s**(1/2) ñ.96 TeV using
300 pb-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-flavored 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 x 10-7 (3.0 x 10-7)
at the 90% (95%) confidence level.
Return to top of page.
Go to Physics Results
Updated: Tuesday, 2010 November 16 13:44:46 CST automatically from input from Carol Picciolo