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CERN Document Server Намерени са 2,051 записа  1 - 10следващкрай  отиване на запис: Търсенето отне 0.99 секунди. 
1.
(100)
Study of $B^0_s$ oscillations and lifetime using fully reconstructed $D^-_s$ decays / ALEPH Collaboration
A search for B0s oscillations is performed using approximately 4 million Z --> qqbar events collected by the ALEPH experiment during 1991-1995. B0s candidates are partially reconstructed by combining tracks with fully reconstructed Ds- candidates. [...]
CERN-PPE-97-157; FSU-SCRI-98-85.- Tallahassee, FL : Florida State Univ., 1998 - 29 p. ALEPH Papers - Published in : Eur. Phys. J. C 4 (1998) 367-385 Fulltext: PDF; - CERN library copies
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2.
(91)
Study of the B$_{s}^{0}\overline{B}_{s}^{0}$ oscillation frequency using D$_{s}^{-}$l$^{+}$ combinations in Z decays / ALEPH Collaboration
A lower limit on the oscillation frequency of the BsBsbar system is obtained from approximately four million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1995. Leptons are combined with opposite sign Ds- candidates reconstructed in seven different decay modes as evidence of semileptonic Bs decays [...]
CERN-PPE-96-030; FSU-SCRI-96-105.- Geneva : CERN, 1996 - 21 p. ALEPH Papers - Published in : Phys. Lett. B 377 (1996) 205-221 Fulltext: PDF; - CERN library copies
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3.
(84)
Improved search for $B^0_s-\overline{B}^0_s$ oscillations / ALEPH Collaboration
An improved search for Bs oscillations is performed in the ALEPH data sample collected during the first phase of LEP, and reprocessed in 1998. Three analyses based on complementary event selections are presented. [...]
CERN-EP-2002-016.- Geneva : CERN, 2003 - 40 p. ALEPH Papers - Published in : Eur. Phys. J. C 29 (2003) 143-170 Fulltext: PDF; - CERN library copies
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4.
(74)
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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5.
(62)
Improved measurement of the $B^0_d$--$\overline{B}^0_d$ Oscillation frequency / ALEPH Collaboration
The time dependence of $B^0_d--\bar{B}^0_d$ oscillations is measured by the ALEPH experiment at LEP, using three techniques, two of which are updates of previous measurements. In all cases the charge of the decaying $b$ quark and its decay time are measured in one hemisphere of the event; the quark charge at production is tagged mainly using the opposite hemisphere [...]
CERN-PPE-96-102; CERN-OPEN-99-366.- Geneva : CERN, 1997 - 18 p. ALEPH Papers - Published in : Z. Phys. C 75 (1997) 397-407 Fulltext: open-99-366 - PDF; ppe-96-102 - PDF;
In : 28th International Conference on High-energy Physics, Warsaw, Poland, 25 - 31 Jul 1996, pp.PA05-055
28th International Conference on High-energy Physics, Warsaw, Poland, 25 - 31 Jul 1996, pp.e-proc. only - CERN library copies
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6.
(60)
Determination of sin$^{2}\vartheta^{eff}_{W}$ using jet charge measurements in hadronic Z decays / ALEPH Collaboration
The electroweak mixing angle is determined with high precision from measurements of the mean difference between forward and backward hemisphere charges in hadronic decays of the Z. A data sample of 2.5 million hadronic Z decays recorded over the period 1990 to 1994 in the ALEPH detector at LEP is used. [...]
CERN-PPE-96-009; FSU-SCRI-96-114.- Geneva : CERN, 1996 - 37 p. ALEPH Papers - Published in : Z. Phys. C 71 (1996) 357-378 Fulltext: PDF; - CERN library copies
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7.
(58)
Measurement of the b baryon lifetime and branching fractions in Z decays / ALEPH Collaboration
Using approximately 4 million hadronic Z decays recorded with the Aleph detector from 1991 through 1995, the lifetime of the b baryon is measured with three independent methods. From the impact parameter distribution of candidate leptons in 1063 events with Lambda-lepton combinations, the average b baryon lifetime is measured to be 1.20 +-0.08 +-0.06 ps. [...]
CERN-PPE-97-111.- Geneva : CERN, 1998 - 26 p. ALEPH Papers - Published in : Eur. Phys. J. C 2 (1998) 197-211 Fulltext: PDF; - CERN library copies
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8.
(55)
Analysis of transverse momentum correlations in hadronic Z decays / ALEPH Collaboration
In a recent paper, evidence was presented for a significant,positive correlation between the total transverse momenta of particleson opposite hemispheres of hadronic events. A new, model independentanalysis of the data has been made. [...]
CERN-EP-98-187.- Geneva : CERN, 1999 - 19 p. ALEPH Papers - Published in : Phys. Lett. B 447 (1999) 183-198 Fulltext: PDF; - CERN library copies
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9.
(55)
Measurement of the B$^{0}_{s}$ lifetime and production rate with D$^{-}_{s}$ l$^{+}$ combinations in Z decays / ALEPH Collaboration
The lifetime of the \bs meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different \ds decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic \bs decays. [...]
CERN-PPE-95-125; FSU-SCRI-95-122.- Tallahassee, FL : Florida State Univ., 1995 - 15 p. ALEPH Papers - Published in : Phys. Lett. B 361 (1995) 221-233 Fulltext: PDF; - CERN library copies
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10.
(54)
Investigation of Inclusive CP Asymmetries in B$^{0}$ Decays / ALEPH Collaboration
A search for CP violating effects in the mixing of neutral B mesons is performed using a sample of 4.1 million hadronic Z decays collected with the ALEPH detector from 1991 to 1995. By studying time-dependent asymmetries in flavour-tagged samples of semileptonic and fully inclusive b-hadron decays, two measurements of the semileptonic asymmetry a_cp are extracted. [...]
CERN-EP-2000-105.- Geneva : CERN, 2001 - 25 p. ALEPH Papers - Published in : Eur. Phys. J. C 20 (2001) 431-443 Fulltext: PDF; - CERN library copies
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