The lifetimes of the B- and (B) over bar(0) mesons are measured using the partially reconstructed semileptonic decays (B) over bar --> Dl(-)<(nu)over bar>X, where D is either a D-0 or D*(+) meson. The data were collected by the CDF detector at the Fermilab Tevatron collider during 1992-1993 and correspond to 19.3 pb(-1) of <(p)over bar p> collisions at root s = 1.8 TeV. We measure the decay length distributions and find the lifetimes to be tau(B-)= 1.56 +/- 0.13 +/- 0.06 ps and tau(($) over bar(0)) = 1.54 +/- 0.08 +/- 0.06 ps, and the ratio of lifetimes to be tau(B-)/tau((B) over bar(0)) = 1.01 +/- 0.11 +/- 0.02, where the first uncertainties are statistical and the second are systematic.
Measurement of theB−andB¯0Meson Lifetimes Using Semileptonic Decays
DONATI, SIMONE;PUNZI, GIOVANNI;
1996-01-01
Abstract
The lifetimes of the B- and (B) over bar(0) mesons are measured using the partially reconstructed semileptonic decays (B) over bar --> Dl(-)<(nu)over bar>X, where D is either a D-0 or D*(+) meson. The data were collected by the CDF detector at the Fermilab Tevatron collider during 1992-1993 and correspond to 19.3 pb(-1) of <(p)over bar p> collisions at root s = 1.8 TeV. We measure the decay length distributions and find the lifetimes to be tau(B-)= 1.56 +/- 0.13 +/- 0.06 ps and tau(($) over bar(0)) = 1.54 +/- 0.08 +/- 0.06 ps, and the ratio of lifetimes to be tau(B-)/tau((B) over bar(0)) = 1.01 +/- 0.11 +/- 0.02, where the first uncertainties are statistical and the second are systematic.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.