Title of article
Measurement of the B 0 and B− meson lifetimes
Author/Authors
ALEPH Collaboration، نويسنده , , R. Barate، نويسنده , , D. Decamp، نويسنده , , P. Ghez، نويسنده , , C. Goy، نويسنده , , J.-P. Lees، نويسنده , , E. Merle، نويسنده , , M.-N. Minard، نويسنده , , B. Pietrzyk، نويسنده , , S. Bravo، نويسنده , , M.P. Casado، نويسنده , , M. Chmeissani، نويسنده , , J.M. Crespo، نويسنده , , E. Fernandez، نويسنده , , M. Fernandez-Bosman، نويسنده , , Ll. Garrido، نويسنده , , E. Graugès، نويسنده , , M. Martinez، نويسنده , , G. Mérino، نويسنده , , R. Miquel، نويسنده , , et al.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2000
Pages
13
From page
275
To page
287
Abstract
The lifetimes of the B 0 and B− mesons are measured using a sample of about four million hadronic Z decays collected from 1991 to 1995 with the Aleph detector at LEP. The data sample has been recently reprocessed, achieving a substantial improvement in the tracking performance. Semileptonic decays of B 0 and B− mesons are partially reconstructed by identifying events containing a lepton with an associated D★+ or D0 meson. The proper time of the B meson is estimated from the measured decay length and the momentum of the D-lepton system. A fit to the proper time of 1880 D★+ℓ− and 2856 D0ℓ− candidates yields the following results: τB 0=1.518±0.053±0.034 ps, τB−=1.648±0.049±0.035 ps, τB−/τB 0=1.085±0.059±0.018.
Journal title
PHYSICS LETTERS B
Serial Year
2000
Journal title
PHYSICS LETTERS B
Record number
913516
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