We have searched for the decay D-0 --> mu(+)mu(-) among 1.25 x 10(5) mu(+)mu(-) pairs produced by 350 GeV/c pi(-) particles interacting in copper and tungsten targets. Using a high-resolution silicon-microstrip detector followed by a large-acceptance magnetic spectrometer and a muon filter we are able to discriminate between prompt and non-prompt muons and to measure dimuon masses. No candidate compatible with a D-0 --> mu(+)mu(-) decay has been found, allowing us to set an upper limit on the branching fraction B(D-0 --> mu(+)mu(-)) of 7.6 x 10(-6) at the 90% confidence level.
SEARCH FOR THE DECAY D-0-]MU(+)MU(-)
ANGELINI, CARLO;RODA, CHIARA MARIA ANGELA;
1995-01-01
Abstract
We have searched for the decay D-0 --> mu(+)mu(-) among 1.25 x 10(5) mu(+)mu(-) pairs produced by 350 GeV/c pi(-) particles interacting in copper and tungsten targets. Using a high-resolution silicon-microstrip detector followed by a large-acceptance magnetic spectrometer and a muon filter we are able to discriminate between prompt and non-prompt muons and to measure dimuon masses. No candidate compatible with a D-0 --> mu(+)mu(-) decay has been found, allowing us to set an upper limit on the branching fraction B(D-0 --> mu(+)mu(-)) of 7.6 x 10(-6) at the 90% confidence level.File in questo prodotto:
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