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CERN Document Server Encontrados 2,051 registros  1 - 10siguientefinal  ir al registro: La búsqueda tardó 1.22 segundos. 
1.
(100)
Search for charginos and neutralinos in $e^+ e^-$ collisions at centre-of-mass energies near 183 GeV and constraints on the MSSM parameter space / ALEPH Collaboration
Searches for charginos and neutralinos are performed with the data collected by the ALEPH detector at LEP at centre-of-mass energies near 183 GeV. In these searches, it is assumed that R-parity is conserved and that the lightest neutralino is the LSP. [...]
CERN-EP-99-014.- Geneva : CERN, 1999 - 48 p. ALEPH Papers - Published in : Eur. Phys. J. C 11 (1999) 193-216 Fulltext: PDF; - CERN library copies
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2.
(91)
Searches for the neutral Higgs bosons of the MSSM in $e^+ e^-$ collisions at centre-of-mass energies of 181-184 GeV / ALEPH Collaboration
The data collected by ALEPH at LEP at centre-of-mass energies ranging from 181 to 184 GeV, corresponding to an integrated luminosity of 57 pb-1, are analysed to search for pair-produced neutral Higgs bosons h and A, in the b bbar b bbar and tau+ tau- b bbar final states. Two events are found in the data with 2.5 expected from standard model processes. [...]
CERN-EP-98-145.- Geneva : CERN, 1998 - 19 p. ALEPH Papers - Published in : Phys. Lett. B 440 (1998) 419
- Published in : Phys. Lett. B 447 (1998) 355 (Erratum) Fulltext: PDF; - CERN library copies
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3.
(84)
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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4.
(82)
Search for invisible Higgs boson decays in $e^{+}e^{-}$ collisions at centre-of-mass energies up to 184 GeV / ALEPH Collaboration
In a data sample of 78.3 pb^-1 collected in 1996 and 1997 by the ALEPH detector at centre-of-mass energies from 161 to 184 GeV, invisible decays of a Higgs boson have been searched for in the reaction e+e- --> hZ, where the Z can decay into e+e-, mu+mu- or qqbar. No evidence for a signal is found and limits on the production cross section are derived as a function of the Higgs boson mass. [...]
CERN-EP-99-008.- Geneva : CERN, 1999 - 15 p. ALEPH Papers - Published in : Phys. Lett. B 450 (1999) 301 Fulltext: PDF; - CERN library copies
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5.
(80)
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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6.
(76)
Measurement of the Hadronic Photon-Structure Function at LEP 1 for $l$-Angle-$Q^{2}$ $r$-Angle Values between 9.9 and 284 $GeV^{2}$ / ALEPH Collaboration
Inclusive gamma^*gamma interactions to hadronic final states where one scattered electron or positron is detected in the electromagnetic calorimeters have been studied in the LEP 1 data taken by ALEPH from 1991 to 1995. The event sample has been used to measure the hadronic structure function of the photon F_2^gamma in three bins with <Q^2> of 9.9, 20.7 and 284 GeV^2..
CERN-EP-99-063.- Geneva : CERN, 1999 - 21 p. ALEPH Papers - Published in : Phys. Lett. B 458 (1999) 152-166 Fulltext: PDF; - CERN library copies
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7.
(76)
Measurement of the W mass in $e^{+} e^{-}$ collisions at 183 GeV / ALEPH Collaboration
1999 - Published in : Phys. Lett. B 453 (1999) 121-37
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8.
(75)
Absolute mass lower limit for the lightest neutralino of the MSSM from $e^{+}e^{-}$ data at $\sqrt{s}$ up to 209 GeV / ALEPH Collaboration
Charginos and neutralinos are searched for in the data collected by the ALEPH experiment at LEP for centre-of-mass energies up to 209 GeV. The negative result of these searches is combined with those from searches for sleptons and Higgs bosons to derive an absolute lower limit of 43.1 GeV/c2 on the mass of the lightest supersymmetric particle (LSP), assumed to be the lightest neutralino. [...]
CERN-EP-2003-077.- Geneva : CERN, 2004 - 21 p. ALEPH Papers - Published in : Phys. Lett. B 583 (2004) 247-263 Fulltext: PDF; - CERN library copies
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9.
(73)
Search for charginos and neutralinos with R-parity violation at $\sqrt{s}$ = 130 and 136 GeV / ALEPH Collaboration
Searches for charginos and neutralinos produced in e+e- collisions at centre-of-mass energies of 130 and 136 GeV have been performed under the assumptions that R-parity is not conserved, that the dominant R-parity violating coupling involves only leptonic fields, and that the lifetime of the lightest supersymmetric particle can be neglected. In the 5.7 pb-1 data sample collected by ALEPH, no candidate events were found. [...]
CERN-PPE-96-086; FSU-SCRI-96-142.- Geneva : CERN, 1996 - 12 p. ALEPH Papers - Published in : Phys. Lett. B 384 (1996) 461-470 Fulltext: PDF;
In : 28th International Conference on High-energy Physics, Warsaw, Poland, 25 - 31 Jul 1996, pp.PA13-030 - CERN library copies
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10.
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Search for R-Parity Violating Decays of Supersymmetric Particles in $e^{+}e^{-}$ Collisions at Centre-of-Mass Energies near 183 GeV / ALEPH Collaboration
Searches for pair-production of supersymmetric particles under the assumption that R-parity is violated via a single dominant $LL{\bar E}$, $LQ{\bar D}$ or ${\bar U} {\bar D} {\bar D}$ coupling are performed using the data collected by the \ALEPH\ collaboration at centre-of-mass energies of 181--184~$\gev$. The observed candidate events in the data are in agreement with the Standard Model expectations. [...]
CERN-EP-99-093.- Geneva : CERN, 2000 - 33 p. ALEPH Papers - Published in : Eur. Phys. J. C 13 (2000) 29-46 English: EPS; French: EPS; Fulltext: ep-99-093.fig2_a - EPS; ep-99-093.fig2_b - EPS; ep-99-093.fig2_c - EPS; ep-99-093.fig3_a - EPS; ep-99-093.fig3_b - EPS; ep-99-093.fig1_d - EPS; ep-99-093.fig1_c - EPS; ep-99-093.fig1_b - EPS; ep-99-093.fig1_a - EPS; ep-99-093 - PDF; ep-99-093.fig1_h - EPS; ep-99-093.fig13_a - EPS; ep-99-093.fig13_b - EPS; ep-99-093.fig12_d - EPS; ep-99-093.fig12_a - EPS; ep-99-093.fig12_b - EPS; ep-99-093.fig12_c - EPS; ep-99-093.fig11_b - EPS; ep-99-093.fig11_a - EPS; ep-99-093.fig6_d - EPS; ep-99-093.fig6_a - EPS; ep-99-093.fig6_b - EPS; ep-99-093.fig6_c - EPS; ep-99-093.fig4_b - EPS; ep-99-093.fig4_c - EPS; ep-99-093.fig4_a - EPS; ep-99-093.fig4_d - EPS; ep-99-093.fig5_b - EPS; ep-99-093.fig5_a - EPS; German: EPS; - CERN library copies
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