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CERN Document Server 2,050 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 1.70 δευτερόλεπτα. 
1.
(100)
Measurement of the W mass by direct reconstruction in $e^+ e^-$ collisions at 172 GeV / ALEPH Collaboration
The mass of the W boson is obtained from reconstructed invariant mass distributions in W-pair events. The sample of W pairs is selected from 10.65~pb$^{-1}$ collected with the ALEPH detector at a mean centre-of-mass energy of 172.09 \GEV. [...]
CERN-PPE-97-164.- Geneva : CERN, 1998 - 17 p. ALEPH Papers - Published in : Phys. Lett. B 422 (1998) 384 Fulltext: PDF; - CERN library copies
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2.
(91)
Measurement of the W mass in $e^+ e^-$ collisions at 183 GeV / ALEPH Collaboration
The mass of the W boson is obtained from reconstructed invariant mass distributions in W-pair events. The sample of W pairs is selected from 57 pb$^{-1}$ collected with the ALEPH detector in 1997 at a centre-of-mass energy of 183 GeV. [...]
CERN-EP-99-027.- Geneva : CERN, 1999 - 21 p. ALEPH Papers - Published in : Phys. Lett. B 453 (1999) 121-137 Fulltext: PDF; - CERN library copies
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3.
(88)
Measurement of the W mass in $e^{+}e^{-}$ collisions at production threshold / ALEPH Collaboration
In June 1996, the LEP centre-of-mass energy was raised to 161 GeV. Pair production of W bosons in e+e- collisions was observed for the first time by the LEP experiments. [...]
CERN-PPE-97-025.- Geneva : CERN, 1997 - 22 p. ALEPH Papers - Published in : Phys. Lett. B 401 (1997) 347-362 Fulltext: PDF; - CERN library copies
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4.
(73)
Measurement of the W Mass and Width in $e^+ e^-$ Collisions at 189 GeV / ALEPH Collaboration
The mass of the W boson is determined in e+e- collisions at LEP by the direct reconstruction of W decays in WW->qqqq and WW->lvqq events, supplemented by measurements using the kinematic properties of the leptons in the WW->lvlv decay channel. The main sample of W pairs is selected from an integrated luminosity of 174 pb^-1 collected with the ALEPH detector in 1998 at a centre-of-mass energy of 188.63 GeV.The combined result from all channels is mW = 80.432+-0.072(stat.)+-0.041(syst.)+-0.019(FSI)+-0.017(LEP) GeV/c^2, where FSI represents the possible effects of final state interactions in the qqqq channel [...]
CERN-EP-2000-045.- Geneva : CERN, 2000 - 33 p. ALEPH Papers - Published in : Eur. Phys. J. C 17 (2000) 241-261 Fulltext: PDF; External link: Fulltext
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.e-page 144 - CERN library copies
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5.
(72)
Measurement of the W-pair cross section in $e^+ e^-$ collisions at 172 GeV / ALEPH Collaboration
The e+e- --> W+W- cross section is measured in a data sample collected by ALEPH at a mean centre--of--mass energy of 172.09 GEV, corresponding to an integrated luminosity of 10.65 pb-1. Cross sections are given for the three topologies, fully leptonic, semi-leptonic and hadronic of a W-pair decay. [...]
CERN-PPE-97-102.- Geneva : CERN, 1997 - 15 p. ALEPH Papers - Published in : Phys. Lett. B 415 (1997) 435-444 Fulltext: PDF; - CERN library copies
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(69)
A direct measurement of $|V_{cs}|$ in hadronic W decays using a charm tag / ALEPH Collaboration
The inclusive charm production rate in W decays is measured from a study of the properties of final state particles. The sample of W pairs is selected from 67.7 pb-1 collected by ALEPH in 1996 and 1997 at centre-of-mass energies near 172 and 183 GeV in the channels W+W- -->4q and W+W- -->lvqq. [...]
CERN-EP-99-124; CERN-ALEPH-99-062.- Geneva : CERN, 1999 - 18 p. ALEPH Papers - Published in : Phys. Lett. B 465 (1999) 349-362 Fulltext: PDF; - Please contact the library if you need to access this document.
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7.
(69)
A measurement of the QCD colour factors and a limit on the light gluino / ALEPH Collaboration
Using data collected from 1992 to 1995 with the ALEPH detector at LEP, a measurement of the colour factor ratios CA/CF and TF/CF and the strong coupling constant $\overline{\alpha}_s = CF \alpha_s(Mz)/ (2\pi)$ has been performed by fitting theoretical predictions simultaneously to the measured differential two-jet rate and angular distributions in four-jet events. The result is found to be in excellent agreement with QCD, CA/CF = 2.20 +- 0.09 (stat) +- 0.13 (syst) , TF/CF = 0.29 +- 0.05 (stat) +- 0.06 (syst) . [...]
CERN-PPE-97-002.- Geneva : CERN, 1997 - 28 p. ALEPH Papers - Published in : Z. Phys. C 76 (1997) 1-14 Fulltext: PDF; - CERN library copies
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8.
(69)
Measurement of the W mass in $WW \to q \overline{q}q \overline{q}$ at 183 GeV with neural network / Duperrin, A (Lyon, IPN)
LYCEN-98-69 ; DELPHI-98-150-PHYS-794. - 1998. - 14 p.
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9.
(68)
Measurement of W-pair production in $e^{+}e^{-}$ collisions at centre-of-mass energies from 183 to 209 GeV / ALEPH Collaboration
The W+W- production cross section is measured from a data sample corresponding to a total integrated luminosity of 683 pb-1, collected by the ALEPH experiment at LEP at centre-of-mass energies from 183 to 209 GeV.Individual cross sections for the different topologies arising from W decays into leptons or hadrons, as well as the total W-pair cross section are given at eight centre-of-mass energies. The results are found to be in agreement with recently developed Standard Model calculations at the one percent level. [...]
CERN-PH-EP-2004-012.- Geneva : CERN, 2004 - 27 p. ALEPH Papers - Published in : Eur. Phys. J. C 38 (2004) 147-160 Fulltext: PDF; - CERN library copies
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10.
(59)
Measurement of the transverse spin correlations in the decay $Z \rightarrow \tau^+\tau^-$ / ALEPH Collaboration
For tau leptons produced in e^+e^- -> tau^+ tau^- interactions there are, in addition to the longitudinal spin correlations, two independent transverse spin correlations associated with the transverse (within the production plane) and normal (to the production plane) polarization components. A measurement of the transverse-transverse and transverse-normal tau spin correlations in the decay Z -> tau^+ tau^-, C_{TT} and C_{TN}, is presented based on the aplanarity angle of the decay products of both tau leptons. [...]
CERN-PPE-97-047.- Geneva : CERN, 1997 - 14 p. ALEPH Papers - Published in : Phys. Lett. B 405 (1997) 191-201 Fulltext: PDF; - CERN library copies
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