Search for rare and forbidden 3-body di-muon decays of the charmed mesons D+ and Ds+
Using a high statistics sample of photo-produced charm particles from the FOCUS experiment at Fermilab, we report results of a search for eight rare and Standard-Model-forbidden decays: D+, Ds+→h±μ∓μ+ (with h=π,K). Improvement over previous results by a factor of 1.7–14 is realized. Our branching ratio upper limit D+→π+μ−μ+ of 8.8×10−6 at the 90% C.L. is below the current MSSM R-parity violating constraint.
Kryemadhi, Abaz, "Search for rare and forbidden 3-body di-muon decays of the charmed mesons D+ and Ds+" (2003). Mathematics, Physics, and Statistics Educator Scholarship. 36.