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Measurement of the branching fraction for D0 → K−π+

Research output: Contribution to journalJournal article


Journal publication date1997
JournalPhysics Letters B
Number of pages10
Original languageEnglish


The branching fraction for D0 → K−π+ is measured with the statistics collected by ALEPH from 1991 to 1994. The method is based on the comparison between the rate for the reconstructed , D0 → K−π+ decay chain and the rate for inclusive soft pion production at low transverse momentum with respect to the nearest jet. The result is B(D0 → K−π+0 = (3.90 ± 0.09 ± 0.12)%