Search for {ital D{sup {bold 0}}}{ital {bold {bar D}}}{sup {bold 0}} Mixing in Semileptonic Decay Modes

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Physical Review Letters

OSTI ID:389026

We report the result of a search for {ital D}{sup 0}{ital {bar D}}{sup 0} mixing in the data from hadroproduction experiment E791 at Fermilab. We use the charge of the pion from the strong decay {ital D}{sup {asterisk}+}{r_arrow}{ital D}{sup 0}{pi}{sup +} (and charge conjugate) to identify the charm quantum number of the neutral {ital D} at production, and the charge of the lepton and the kaon in the semileptonic decays {ital D}{sup 0}{r_arrow}{ital Ke}{nu} and {ital K}{mu}{nu} to identify the charm at the time of decay. No evidence of mixing is seen. We set a 90{percent} confidence level upper limit on mixing of {ital r}{lt}0.50{percent}, where {ital r}={Gamma}({ital D}{sup 0}{r_arrow}{bar {ital D}}{sup 0}{r_arrow}{ital K}{sup +}{ital l}{sup {minus}}{nu}{sub {ital l}})/{Gamma}({ital D}{sup 0}{r_arrow}{ital K}{sup {minus}}{ital l}{sup +}{nu}{sub {ital l}}). {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 389026
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTI-D NEUTRAL MESONS
CHARMED MESONS
D NEUTRAL MESONS
D*-2010 MESONS
KAONS
MIXING
PARTICLE PRODUCTION
PIONS
PIONS PLUS
QUANTUM NUMBERS
SEMILEPTONIC DECAY