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CERN Document Server Encontrados 2,051 registros  1 - 10siguientefinal  ir al registro: La búsqueda tardó 1.29 segundos. 
1.
(100)
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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2.
(91)
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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3.
(90)
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.
(90)
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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5.
(84)
Improved measurement of the Triple-Gauge-Boson Couplings $\gamma WW$ and ZWW in $e^+ e^-$ collisions / ALEPH Collaboration
Triple gauge-boson couplings WWgamma and WWZ involving single-photon, single-W and W-pair production are determined using data samples collected at LEP with the ALEPH detector at centre-of-mass energies between 183 and 209 GeV. The integrated luminosity used is 700 pb-1 for the single-photon measurement and 683 pb-1 for the W channels. [...]
CERN-PH-EP-2004-065.- Geneva : CERN, 2005 - 21 p. ALEPH Papers - Published in : Phys. Lett. B 614 (2005) 7-26 Fulltext: PDF; - CERN library copies
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6.
(77)
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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7.
(75)
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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8.
(74)
Bose-Einstein correlations in W-pair decays with an event-mixing technique / ALEPH Collaboration
Bose-Einstein correlations in W-pair decays are studied using data collected by the ALEPH detector at LEP at e+e- centre-of-mass energies from 183 to 209 GeV. The analysis is based on the comparison of WW-->qqqq events to ``mixed'' events constructed with the hadronic part of WW-->qqlnu events. [...]
CERN-PH-EP-2004-053.- Geneva : CERN, 2005 - 16 p. ALEPH Papers - Published in : Phys. Lett. B 606 (2005) 265-275 Fulltext: PDF; - CERN library copies
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9.
(73)
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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10.
(72)
Search for a Scalar Top almost degenerate with the lightest Neutralino in $e^{+}e^{-}$ Collisions at $\sqrt{s}$ up to 202 GeV / ALEPH Collaboration
Data collected at centre-of-mass energies from 189 GeV to 202 GeV by the ALEPH detector at LEP, corresponding to an integrated luminosity of 411 pb-1, are analysed in a search for the scalar top in the decay channels 'stop -> c/u neutralino' for small mass differences between the stop and the lightest neutralino. No evidence for deviations from the Standard Model expectation is found and a lower limit of 59 GeV/c**2 is set for the stop mass, independent of the stop to neutralino mass difference and of the stop lifetime..
CERN-EP-2000-085.- Geneva : CERN, 2000 - 14 p. ALEPH Papers - Published in : Phys. Lett. B 488 (2000) 234-46 Fulltext: PDF; - CERN library copies
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