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CERN Document Server Pronađeno je 2,051 zapisa  1 - 10slijedećikraj  idi na zapis: Pretraživanje je potrajalo 1.39 sekundi 
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(100)
A precise measurement of the average b hadron lifetime / ALEPH Collaboration
An improved measurement of the average b hadron lifetime is performed using a sample of 1.5 million hadronic Z decays, collected during the 1991-1993 runs of ALEPH, with the silicon vertex detector fully operational. This uses the three-dimensional impact parameter distribution of lepton tracks coming from semileptonic b decays and yields an average b hadron lifetime of 1.533 \pm 0.013 \pm 0.022 ps..
CERN-PPE-95-121.- Geneva : CERN, 1996 - 13 p. ALEPH Papers - Published in : Phys. Lett. B 369 (1996) 151-162 Fulltext: PDF; - CERN library copies
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2.
(91)
Tau hadronic branching ratios / ALEPH Collaboration
From 64492 selected \tau-pair events, produced at the Z^0 resonance, the measurement of the tau decays into hadrons from a global analysis using 1991, 1992 and 1993 ALEPH data is presented. Special emphasis is given to the reconstruction of photons and \pi^0's, and the removal of fake photons [...]
CERN-PPE-95-140; FSU-SCRI-96-65.- Geneva : CERN, 1996 - 67 p. ALEPH Papers - Published in : Z. Phys. C 70 (1996) 579-608 Fulltext: PDF; - CERN library copies
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3.
(90)
Limit on B$^{0}_{s}$ oscillation using a jet charge method / ALEPH Collaboration
A lower limit is set on the B_{s}^{0} meson oscillation parameter \Delta m_{s} using data collected from 1991 to 1994 by the ALEPH detector. Events with a high transverse momentum lepton and a reconstructed secondary vertex are used. [...]
CERN-PPE-95-84; FSU-SCRI-95-99.- Tallahassee, FL : Florida State Univ., 1995 - 21 p. ALEPH Papers - Published in : Phys. Lett. B 356 (1995) 409-422 Fulltext: PDF; - CERN library copies
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4.
(89)
Updated measurement of the average b hadron lifetime / ALEPH Collaboration
CERN-PPE-92-133.- Geneva : CERN, 1992 - 20 p. ALEPH Papers - Published in : Phys. Lett. B 295 (1992) 174-186 Fulltext: PDF; - CERN library copies
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5.
(89)
Measurement of the $B^{0}_{s}$ lifetime / ALEPH Collaboration
CERN-PPE-93-214; FSU-SCRI-94-32.- Geneva : CERN, 1994 - 18 p. ALEPH Papers - Published in : Phys. Lett. B 322 (1994) 275-286 Fulltext: P00020954 - TIF; ppe-93-214 - PDF; - CERN library copies
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6.
(88)
Production of excited beauty states in Z decays / ALEPH Collaboration
A data sample of about 3.0 million hadronic Z decays collected by the ALEPH experiment at LEP in the years 1991 through 1994, is used to make an inclusive selection of B~hadron events. In this event sample 4227 \pm 140 \pm 252 B^* mesons in the decay B^* \to B \gamma and 1944 \pm 108 \pm 161 B^{**} mesons decaying into a B~meson and a charged pion are reconstructed. [...]
CERN-PPE-95-108; FSU-SCRI-96-16.- Geneva : CERN, 1996 - 24 p. ALEPH Papers - Published in : Z. Phys. C 69 (1996) 393-404 Fulltext: PDF; - CERN library copies
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7.
(88)
Measurement of the $\tau$ lepton lifetime / ALEPH Collaboration
The mean lifetime of the \tau lepton is measured in a sample of 25700 \tau pairs collected in 1992 with the ALEPH detector at LEP. A new analysis of the 1-1 topology events is introduced. [...]
CERN-PPE-95-128; FSU-SCRI-96-63.- Geneva : CERN, 1996 - 18 p. ALEPH Papers - Published in : Z. Phys. C 70 (1996) 549-560 Fulltext: PDF; - CERN library copies
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8.
(85)
Measurement of D$_{s}^{+}$ meson production in Z decays and of the $\overline{B}_{s}^{0}$ lifetime / ALEPH Collaboration
CERN-PPE-95-92; FSU-SCRI-96-34.- Geneva : CERN, 1996 - 24 p. ALEPH Papers - Published in : Z. Phys. C 69 (1996) 585-595 Fulltext: PDF; - CERN library copies
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9.
(85)
A study of the decay width difference in the $B^{0}_{s}-\overline{B}^{0}_{s}$ system using $\phi\phi$ correlations / ALEPH Collaboration
In a data sample of about four million hadronic Z decays recorded with the ALEPH detector from 1991 to 1995, the $B^{0}_{s} \to D^{(*)+}_{s}D^{(*)-}_{s}$ decay is observed, based on tagging the nal state with two $\phi$ mesons in the same hemisphere. The $D^{(*)+}_{s}D^{(*)-} _{s}$ final state is mostly CP even and corresponds to the short-lived $B^0$ mass eigenstate. [...]
CERN-EP-2000-036.- Geneva : CERN, 2000 - 20 p. ALEPH Papers - Published in : Phys. Lett. B 486 (2000) 286-99 Fulltext: ep-2000-036_version1 - PDF; ep-2000-036 - PDF; External link: Published version
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.e-page 137 - CERN library copies
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10.
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Measurements of mean lifetime and branching fractions of b hadrons decaying to $J/\psi$ / ALEPH Collaboration
CERN-PPE-92-142; FSU-SCRI-93-71.- Geneva : CERN, 1992 - 21 p. ALEPH Papers - Published in : Phys. Lett. B 295 (1992) 396-408 Fulltext: PDF; - CERN library copies
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