Improved measurement of the $B^0$ and $B^+$ meson lifetimes
نویسندگان
چکیده
منابع مشابه
Measurement of the ratio of B+ and B0 meson lifetimes.
The ratio of the B+ and B0 meson lifetimes was measured using data collected in 2002-2004 by the D0 experiment in Run II of the Fermilab Tevatron Collider. These mesons were reconstructed in B-->mu(+)nuD(*-)X decays, which are dominated by B0 and B-->mu(+)nuD 0X decays, which are dominated by B+. The ratio of lifetimes is measured to be tau(+)/tau(0)=1.080+/-0.016(stat)+/-0.014(syst).
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The lifetimes of the B and B0 mesons are measured using the partially reconstructed semileptonic decays B → DlνX, where D is either a D0 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 p̄p collisions at √ s = 1.8 TeV. We measure decay lengths and extract the lifetimes to be τ(B) = 1.637 ± 0.058 0.045...
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Bd and Bs meson systems play a fundamental role to test and improve our understanding of Standard Model flavor dynamics. The mixing parameters ∆md,s represent important constraints in the unitarity triangle analysis. Their theoretical estimates require non-perturbative calculations of B-meson decay constants and B-parameters; accurate results, recently obtained from the lattice, are reviewed. O...
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The lifetimes of charmed mesons have been measured using 2.75 fb of data collected with the Belle detector at KEKB. Each candidate is fully reconstructed to identify the flavor of the charmed meson. The lifetimes are measured to be τ(D) = (414.8±3.8±3.4) fs, τ(D) = (1040 −22 ± 18) fs and τ(D + s ) = (479 +17 −16 +6 −8) fs, where the first error is statistical and the second error is systematic....
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The oscillation frequency, md , of B0 mesons is measured using semileptonic decays with a D− or D∗− meson in the final state. The data sample corresponds to 3.0 fb−1 of pp collisions, collected by the LHCb experiment at centre-of-mass energies √ s = 7 and 8 TeV. A combination of the two decay modes gives md = (505.0 ± 2.1 ± 1.0) ns−1, where the first uncertainty is statistical and the second is...
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ژورنال
عنوان ژورنال: Zeitschrift f�r Physik C Particles and Fields
سال: 1996
ISSN: 0170-9739,1431-5858
DOI: 10.1007/s002880050145