The lifetimes of the B- and (B) over bar(0) mesons an 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 1992-1995 and correspond to about 110 pb(-1) of (p) over bar p collisions at root s = 1.8 TeV. We measure decay lengths and extract the lifetimes to be tau(B-) = 1.637 +/- 0.058(-0.043)(+0.045) ps and tau((B) over bar(0)) = 1.474 +/- 0.039(-0.051)(+0.052) ps, and the ratio of the lifetimes to be tau(B-)/tau((B) over bar(0)) = 1.110 +/- 0.056(+0.030)(+0.033), where the first uncertainties are statistical and the second are systematic. [S0556-2821(98)08419-7].
Measurement of the B- and (B)over-bar(0) meson lifetimes using semileptonic decays
BISELLO, DARIO;BUSETTO, GIOVANNI;LUCCHESI, DONATELLA;MARIOTTI, MOSE';MENGUZZATO, MATTEO;
1998
Abstract
The lifetimes of the B- and (B) over bar(0) mesons an 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 1992-1995 and correspond to about 110 pb(-1) of (p) over bar p collisions at root s = 1.8 TeV. We measure decay lengths and extract the lifetimes to be tau(B-) = 1.637 +/- 0.058(-0.043)(+0.045) ps and tau((B) over bar(0)) = 1.474 +/- 0.039(-0.051)(+0.052) ps, and the ratio of the lifetimes to be tau(B-)/tau((B) over bar(0)) = 1.110 +/- 0.056(+0.030)(+0.033), where the first uncertainties are statistical and the second are systematic. [S0556-2821(98)08419-7].Pubblicazioni consigliate
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