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CERN Document Server 110 records found  1 - 10próximoend  jump to record: Search took 0.78 seconds. 
1.
Quark and Gluon Jets at LEP / Parsons, Mark Ian
CERN-ALEPH-THESIS-94-166 ; RALT-027. - Geneva : CERN, 1994. - 171 p.

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2.
A measurement of the semileptonic branching ratio BR(b-baryon $\rightarrow p l\overline{\nu}X$) and a study of inclusive $\pi^{\pm}$, $K^{\pm}$, ($p,\overline{p}$) production in Z decays / ALEPH Collaboration
Inclusive pi^+/-, K^+/- (p,pbar) production is investigated using data recorded by the ALEPH detector between 1992 and 1994. The momentum spectra and multiplicities are measured separately in Z -->bbar, Z-->ccbar and Z-->uubar,ddbar,ssbar decays. [...]
CERN-PPE-97-153.- Geneva : CERN, 1998 - 37 p. ALEPH Papers - Published in : Eur. Phys. J. C 5 (1998) 205-227 Fulltext: PDF; - CERN library copies
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3.
An upper limit on the $\tau$ neutrino mass from three- and five-prong tau decays / ALEPH Collaboration
A bound on the tau neutrino mass is established using the data collected from 1991 to 1995 at Ecm = M(Z) with the ALEPH detector. Two separate limits are derived by fitting the distribution of visible energy vs invariant mass in tau+ -> pi+ pi+ pi- nu and tau+ -> pi+ pi+ pi- pi- pi+ (pi0) nu decays. [...]
CERN-PPE-97-138.- Geneva : CERN, 1998 - 23 p. ALEPH Papers - Published in : Eur. Phys. J. C 2 (1998) 395-406 Fulltext: PDF; - CERN library copies
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4.
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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5.
Updated measurement of the $\tau$ lepton lifetime / ALEPH Collaboration
A new measurement of the mean lifetime of the tau lepton is presented. Three different analysis methods are applied to a sample of 90000 tau pairs, collected in 1993 and 1994 with the ALEPH detector at LEP. [...]
hep-ex/9710026; CERN-PPE-97-090; CERN-PPE-97-90; FSU-SCRI-98-12; CERN-PPE-97-090.- Geneva : CERN, 1997 - 13 p. ALEPH Papers - Published in : Phys. Lett. B 414 (1997) 362-372 Fulltext: ppe-97-090 - PDF; arXiv:hep-ex_9710026 - PDF; - Please contact the library if you need to access this document.
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6.
Three-prong $\tau$ decays with charged kaons / ALEPH Collaboration
Final states with charged kaons in three-prong $\tau$ decays are studied by exploiting the particle identification from the dE/dx measurement. The results are based on a sample of about $1.6\times 10^{5}$ detected $\tau$ pairs collected with the ALEPH detector between 1991 and 1995 around the Z peak. [...]
CERN-PPE-97-069.- Geneva : CERN, 1998 - 33 p. ALEPH Papers - Published in : Eur. Phys. J. C 1 (1998) 65-79 Fulltext: PDF; - CERN library copies
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7.
Search for sleptons in $e^+ e^-$ collisions at centre-of-mass energies of 161 GeV and 172 GeV / ALEPH Collaboration
The data recorded by the ALEPH experiment at LEP at centre-of-mass energies of 161 GeV and 172 GeV were analysed to search for sleptons, the supersymmetric partners of leptons. No evidence for the production of these particles was found. [...]
hep-ex/9706006; CERN-PPE-97-056; CERN-PPE-97-56; FSU-SCRI-97-125; CERN-PPE-97-056.- Geneva : CERN, 1997 - 17 p. ALEPH Papers - Published in : Phys. Lett. B 407 (1997) 377-388 Fulltext: arXiv:hep-ex_9706006 - PDF; 9706006 - PDF; External link: hep-ex/9706006 PDF - Please contact the library if you need to access this document.
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8.
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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9.
Search for the $B_{c}$ meson in hadronic Z decays / ALEPH Collaboration
A search for the Bc meson decaying into the channels J/psi pi+ and J/psi l nu (l = e or mu) is performed in a sample of 3.9 million hadronic Z decays collected by the ALEPH detector. This search results in the observation of 0 and 2 candidates in each of these channels, respectively, while 0.44 and 0.81 background events are expected. [...]
CERN-PPE-97-026; FSU-SCRI-97-79.- Tallahassee, FL : Florida State Univ., 1997 - 16 p. ALEPH Papers - Published in : Phys. Lett. B 402 (1997) 213-226 Fulltext: PDF;
In : 28th International Conference on High-energy Physics, Warsaw, Poland, 25 - 31 Jul 1996, pp.PA01-069 - CERN library copies
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10.
Measurement of the branching fraction for $D^{0} \rightarrow K^{-}\pi^{+}$ / ALEPH Collaboration
The branching fraction for D0 -> K- pi+ is measured with the statistics collected by ALEPH from 1991 to 1994. The method is based on the comparison between the rate for the reconstructed D*+ -> D0 pi+, D0 -> K- pi+ decay chain and the rate for inclusive soft pion production at low transverse momentum with respect to the nearest jet [...]
CERN-PPE-97-024.- Geneva : CERN, 1997 - 13 p. ALEPH Papers - Published in : Phys. Lett. B 403 (1997) 367-376 Fulltext: PDF;
In : 28th International Conference on High-energy Physics, Warsaw, Poland, 25 - 31 Jul 1996, pp.PA05-062 - CERN library copies
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CERN Document Server : 110 records found   1 - 10próximoend  jump to record:
Veja também: nomes de autores similares
1 Parsons, M
1 Parsons, M F
1 Parsons, M O
1 Parsons, M R
1 Parsons, M S
2 Parsons, M.I.
2 Parsons, Mark
1 Parsons, Mark Ian
1 Parsons, Mark James
2 Parsons, Maxwell
2 Parsons, Maxwell F
1 Parsons, Michael L
1 Parsons, Mike
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