Search for muonic decays of the antiproton at the Fermilab Antiproton Accumulator

A search for antiproton decay has been made at the Fermilab Antiproton Accumulator. Limits are placed on six antiproton decay modes which contain a final-state muon. At the 90% C.L. we find that tau((p) over bar)/B((p) over bar --> mu(-) gamma) >5.0 X 10(4) yr, tau((p) over bar)/B((p) over bar--> mu- pi(0)) > 4.8 x 10(4) yr, tau((p) over bar)/B((p) over bar-->mu- eta) >7.9 x 10(3) yr, tau((p) over bar)/B((p) over bar--> mu- gamma gamma) > 2.3 X 10(4) yr, tau((p) over bar)/B((p) over bar--> mu(-) pi(0)) > 4.3 X 10(3) yr, and tau((p) over bar)/B((p) over bar-->mu(-) K-L(0)) > 6.5 X 10(3) yr. [S0556-2821(98)50223-8].