Measurements of the {ital B}{sup {bold {minus}}} and {ital {bar B}{sup {bold 0}}} meson lifetimes using semileptonic decays

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Physical Review Letters

OSTI ID:285753

The lifetimes of the {ital B}{sup {minus}} and {bar {ital B}}{sup 0} mesons are measured using the partially reconstructed semileptonic decays {bar {ital B}}{r_arrow}{ital D}l{sup {minus}}{nu}{ital X}, where {ital D} is either a {ital D}{sup 0} or {ital D}{sup {asterisk}+} meson. The data were collected by the CDF detector at the Fermilab Tevatron collider during 1992{endash}1993 and correspond to 19.3 pb{sup {minus}1} of {bar {ital p}}{ital p} collisions at {radical}{ital s}=1.8 TeV. We measure the decay length distributions and find the lifetimes to be {ital r}({ital B}{sup {minus}})=1.56{plus_minus}0.13{plus_minus}0.06 ps and {ital r}({bar {ital B}}{sup 0})=1.54{plus_minus}0.08{plus_minus}0.06 ps, and the ratio of lifetimes to be {ital r}({ital B}{sup {minus}})/{ital r}({bar {ital B}}{sup 0})=1.01{plus_minus}0.11{plus_minus}0.02, where the first uncertainties are statistical and the second are systematic.

• OSTI ID: 285753
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTI-B NEUTRAL MESONS
ANTINEUTRINOS
B MINUS MESONS
D MESONS
FERMILAB TEVATRON
LEPTONS
LIFETIME
SEMILEPTONIC DECAY