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CERN Document Server Encontrados 84 registros  1 - 10siguientefinal  ir al registro: La búsqueda tardó 0.60 segundos. 
1.
Measurement of the quark to photon fragmentation function through the inclusive production of prompt photons in hadronic $Z^0$ decays / OPAL Collaboration
The inclusive production of prompt photons with energy above 10 GeV is measured using the OPAL detector in hadronic Z^0 decays at LEP. In contrast to previous measurements, the prompt photons were not required to be isolated. [...]
hep-ex/9708020; CERN-PPE-97-086; CERN-PPE-97-86; CERN-PPE-97-086.- Geneva : CERN, 1998 - 24 p. - Published in : Eur. Phys. J. C 2 (1998) 39-48 Fulltext: PDF; External links: Fulltext; Fulltext
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2.
Precision electroweak measurements on the $Z$ resonance / ALEPH Collaboration
We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLD experiment using a polarised beam at SLC. [...]
hep-ex/0509008; SLAC-R-774; CERN-PH-EP-2005-041; SLAC-R-774; CERN-L3-304.- Geneva : CERN, 2006 - 302 p. ALEPH Papers - Published in : Phys. Rep. 427 (2006) 257 Fulltext: phep-2005-041 - PDF; arXiv:hep-ex_0509008 - PDF; External link: SLAC Document Server
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3.
Measurements of the $B^{**}$ and $B_{s}^{**}$ Mass Peaks and B Mixing using Data from the OPAL experiment / Bell, A N
RAL-TH-98-004. - Chilton : RAL, 1997. - 149 p.

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4.
Measurement of the branching fractions and forward-backward asymmetries of the $Z^{0}$ into light quarks / OPAL Collaboration
1997 - Published in : Z. Phys. C 76 (1997) 387-400
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5.
Search for scalar top and scalar bottom quarks at $\sqrt {s} $ = 183 GeV at LEP / OPAL Collaboration
Searches for a scalar top quark and a scalar bottom quark have been performed using a total data sample of 56.8 pb-1 at a centre-of-mass energy of 183 GeV collected with the OPAL detector at LEP. No candidate events were observed. [...]
hep-ex/9808026; CERN-EP-98-107; CERN-EP-98-107.- Geneva : CERN, 1999 - 28 p. - Published in : Eur. Phys. J. C 6 (1999) 225-238 Fulltext: 9808026 - PDF; arXiv:hep-ex_9808026 - PDF; External link: hep-ex/9808026 PDF - Please contact the library if you need to access this document.
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6.
Measurement of the one-prong hadronic $\tau$ branching ratios at LEP / OPAL Collaboration
The branching ratios of the \tau^- -> h^- \nu_\tau, \tau^- -> h^- \pi^0 \nu_\tau, \tau^- -> h^- >=2 \pi^0 \nu_\tau decays have been measured using the 1991-1995 data recorded with the OPAL detector at LEP. These branching ratios are measured simultaneously using three selection criteria and are found to be BR(\tau^- -> h^- \nu_\tau) = (11.98 +/- 0.13 +/- 0.16)% BR(\tau^- -> h^- \pi^0 \nu_\tau) = (25.89 +/- 0.17 +/- 0.29)% BR(\tau^- -> h^- >=2 \pi^0 \nu_\tau) = ( 9.91 +/- 0.31 +/- 0.27)% where the first error is statistical and the second is systematic..
hep-ex/9801029; CERN-PPE-97-152; CERN-PPE-97-152.- Geneva : CERN, 1998 - 23 p. - Published in : Eur. Phys. J. C 4 (1998) 193-206 Fulltext: arXiv:hep-ex_9801029 - PDF; 9801029 - PDF; ppe-97-152 - PDF; External link: hep-ex/9801029 PDF - Please contact the library if you need to access this document.
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7.
Search for the $B_c$ meson in hadronic $Z^0$ decays / OPAL Collaboration
A search for decays of the B_c meson was performed using data collected from 1990-1995 with the OPAL detector on or near the Z peak at LEP. The decay channels B_c^+ -> J/psi pi^+, B_c^+ -> J/psi a_1^+ and B_c^+ -> J/psi ell^+ nu were investigated, where ell denotes an electron or a muon. [...]
hep-ex/9801026; CERN-PPE-97-137; CERN-PPE-97-137.- Geneva : CERN, 1998 - 17 p. - Published in : Phys. Lett. B 420 (1998) 157-168 Fulltext: arXiv:hep-ex_9801026 - PDF; 9801026 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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8.
Search for anomalous production of photonic events with missing energy in $e^+ e^-$ collisions at $\sqrt{s}$ = 130-172 GeV / OPAL Collaboration
Photonic events with large missing energy have been observed in e+e- collisions at centre-of-mass energies of 130, 136, 161 and 172 GeV using the OPAL detector at LEP. Results are presented based on search topologies designed to select events with a single photon and missing transverse energy or events with a pair of acoplanar photons. [...]
hep-ex/9801024; CERN-PPE-97-132; CERN-PPE-97-132.- Geneva : CERN, 1998 - 40 p. - Published in : Eur. Phys. J. C 2 (1998) 607-625 Fulltext: arXiv:hep-ex_9801024 - PDF; 9801024 - PDF; External link: hep-ex/9801024 PDF - Please contact the library if you need to access this document.
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9.
Search for anomalous production of dilepton events with missing transverse momentum in $e^{+} e^{-}$ collisions at $\sqrt{s}$ = 161 and 172 GeV / OPAL Collaboration
Events containing a pair of charged leptons and significant missing transverse momentum are selected from a data sample corresponding to a total integrated luminosity of 20.6 pb^-1 at centre-of-mass energies of 161 GeV and 172 GeV. The observed number of events, four at 161 GeV and nine at 172 GeV, is consistent with the number expected from Standard Model processes, predominantly arising from W+W- production with each W decaying leptonically. [...]
hep-ex/9710010; CERN-PPE-97-124; CERN-PPE-97-124.- Geneva : CERN, 1998 - 61 p. - Published in : Eur. Phys. J. C 4 (1998) 47-74 Fulltext: arXiv:hep-ex_9710010 - PDF; 9710010 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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10.
Search for Unstable Heavy and Excited Leptons in $e^+ e^-$ Collisions at $\sqrt{s}$ = 170-172 GeV / OPAL Collaboration
We have searched for unstable neutral and charged heavy leptons, N and L^+/-, and for excited states of neutral and charged leptons, nu*, e*, mu* and tau*, in e^+e^- collisions at centre-of-mass energies of 170 and 172 GeV using the OPAL detector at LEP. No evidence for their existence was found. [...]
hep-ex/9709027; CERN-PPE-97-123; CERN-PPE-97-123.- Geneva : CERN, 1998 - 42 p. - Published in : Eur. Phys. J. C Fulltext: arXiv:hep-ex_9709027 - PDF; 9709027 - PDF; External link: hep-ex/9709027 PDF - Please contact the library if you need to access this document.
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CERN Document Server : Encontrados 84 registros   1 - 10siguientefinal  ir al registro:
Vea también: autores con nombres similares
34 Bell, A
8 Bell, A C
1 Bell, A G
8 Bell, A J
1 Bell, A L
1 Bell, A M
30 Bell, A R
57 Bell, A S
2 Bell, A T
2 Bell, A.
3 Bell, A.J.
26 Bell, A.N.
4 Bell, A.S.
1 Bell, AL
1 Bell, AR
3 Bell, Aaron C
3 Bell, Alan
478 Bell, Alan James
1 Bell, Alan P
3 Bell, Alexander
1 Bell, Alexander J
3 Bell, Alexis T
1 Bell, Allan
1 Bell, Ana
1 Bell, Andreas
3 Bell, Andrew
554 Bell, Andrew Stuart
1 Bell, Andy
1 Bell, Angus
1 Bell, Angus S
1 Bell, Anthony
1 Bell, Anthony E
1 Bell, Anthony J
2 Bell, Anthony R
2 Bell, Antony
1 Bell, Arthur H
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