We report on a search for the flavor-changing neutral-current decay D0→μ+μ- in pp̅ collisions at √s=1.96 TeV using 360 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 μ+μ-, π+π-, and K-π+ decay modes. We use the Cabibbo-favored D0→K-π+ channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D0→π+π- channel for normalization. We set an upper limit on the branching fraction B(D0→μ+μ-)<2.1×10-7(3.0×10-7) at the 90% (95%) confidence level.
Updated search for the flavor-changing neutral-current decay D0→μ+μ- in pp̅ collisions at √s=1.96 TeV
PAGLIARONE, Carmine Elvezio;
2010-01-01
Abstract
We report on a search for the flavor-changing neutral-current decay D0→μ+μ- in pp̅ collisions at √s=1.96 TeV using 360 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 μ+μ-, π+π-, and K-π+ decay modes. We use the Cabibbo-favored D0→K-π+ channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D0→π+π- channel for normalization. We set an upper limit on the branching fraction B(D0→μ+μ-)<2.1×10-7(3.0×10-7) at the 90% (95%) confidence level.File in questo prodotto:
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