Search for the decay of D+ and Ds+ mesons to three charged kaons

Abstract We report the results of a search for the doubly Cabibbo suppressed decays D + → K + K − K + and D + → ΦK + , and the singly Cabibbo suppressed decays D s + → K + K − K + and D s + → ΦK + . Our measurements are all consistent with zero branching ratio, and we set 90% confidence level upper limits on the relative D + branching ratios: BR(ΦK + ) BR(Φπ + ) , BR(K + K − K + ) BR(Φπ + ) and BR(K + K − K + ) BR(K − π + π + ) , and the relative D s + branching ratios: BR(ΦK + ) BR(Φπ + ) and BR(K + K − K + ) BR(Φπ + ) . The data were accumulated by the Fermilab high energy photoproduction experiment E687.