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CERN Document Server Sök i 2,041 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 4.16 sekunder. 
1.
(100)
A study of B meson oscillations using hadronic $Z^0$ decays containing leptons / OPAL Collaboration
An event sample enriched in semileptonic decays of b hadrons is selected using an inclusive lepton selection from approximately 3.0 million hadronic Z^0 decays collected with the OPAL detector. This sample is used to investigate B meson oscillations by reconstructing a proper decay time for the parent of each lepton, using a jet charge method to estimate the production flavour of this parent, and using the lepton charge to tag the decay flavour. [...]
hep-ex/9707009; CERN-PPE-97-036; CERN-PPE-97-36; CERN-PPE-97-036.- Geneva : CERN, 1997 - 36 p. - Published in : Z. Phys. C 76 (1997) 401-415 Fulltext: arXiv:hep-ex_9707009 - PDF; 9707009 - PDF; External link: hep-ex/9707009 PDF - Please contact the library if you need to access this document.
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2.
(91)
An updated study of B meson oscillations using dilepton events / OPAL Collaboration
This paper reports a study of B meson oscillations using hadronic Z^0 decays with two identified leptons, and updates a previous publication by including data collected in 1994. Decay times are reconstructed for each of the semileptonic B decays by forming vertices which include the lepton and by estimating the B meson momentum. [...]
hep-ex/9707010; CERN-PPE-97-064; CERN-PPE-97-64; CERN-PPE-97-064.- Geneva : CERN, 1997 - 18 p. - Published in : Z. Phys. C 76 (1997) 417-423 Fulltext: arXiv:hep-ex_9707010 - PDF; 9707010 - PDF; External link: hep-ex/9707010 PDF - Please contact the library if you need to access this document.
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3.
(68)
Measurement of the $B^{+}$ and $B^{0}$ lifetimes and search for CP(T) violation using reconstructed secondary vertices / OPAL Collaboration
The lifetimes of the B+ and B0 mesons, and their ratio, have been measured in the OPAL experiment using 2.4 million hadronic Z0 decays recorded at LEP. Z0 -> b bbar decays were tagged using displaced secondary vertices and high momentum electrons and muons [...]
hep-ex/9901017; CERN-EP-98-195; CERN-EP-98-195.- Geneva : CERN, 2000 - 32 p. - Published in : Eur. Phys. J. C 12 (2000) 609-626 Fulltext: 9901017 - PDF; arXiv:hep-ex_9901017 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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4.
(65)
A Measurement of the Tau Topological Branching Ratios / DELPHI Collaboration
Using data collected in the DELPHI detector at LEP-1, measurements of the inclusive tau branching ratios for decay modes containing one, three, or five charged particles have been performed, giving the following results: B_1 = B(\tau^- -> (particle)^- \geq 0pi^0 \geq 0K^0 \nu_\tau(\bar{\nu})) = (85.316 +/- 0.093 +/- 0.049)%; B_3 = B(\tau^- -> 2h^-h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (14.569 +/- 0.093 +/- 0.048)%; B_5 = B(\tau^- -> 3h^-2h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (0.115 +/- 0.013 +/- 0.006)%, where h is either a charged pi or K meson. The first quoted uncertainties are statistical and the second systematic..
hep-ex/0105047; CERN-EP-2001-030; CERN-DELPHI-2001-091-CONF-519; CERN-EP-2001-030; DELPHI-2001-091-CONF-519.- Geneva : CERN, 2001 - 32 p. - Published in : Eur. Phys. J. C 20 (2001) 617-637 Fulltext: 0105047 - PDF; arXiv:hep-ex_0105047 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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5.
(59)
Midrapidity antiproton-to-proton ratio in pp collisions at $\sqrt{s} = 0.9$ and $7$~TeV measured by the ALICE experiment / ALICE collaboration
The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at $\sqrt{s} = 0.9$ and $7$~TeV during the initial running periods of the Large Hadron Collider(LHC). The measurement covers the transverse momentum interval $0.45 < p_{\rm{t}} < 1.05$~GeV/$c$ and rapidity $|y| < 0.5$. [...]
arXiv:1006.5432.- 2010 - 12 p. - Published in : Phys. Rev. Lett. 105 (2010) 072002 APS Open Access article: PDF; Fulltext: PDF; External link: DURHAM
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6.
(57)
Search for $\mbox{B}^0_s- \overline{\mbox{B}^0_s}$ oscillations and a measurement of $\mbox{B}^0_d-\overline{\mbox{B}^0_d}$ oscillations using events with an inclusively reconstructed vertex / DELPHI Collaboration
Neutral B meson oscillations in the B0_s - anti-B0_s and B0_d - anti-B0_d systems were studied using a sample of about 4.0 million hadronic Z decays recorded by the DELPHI detector between 1992 and 2000. Events with a high transverse momentum lepton were removed and a sample of 770 k events with an inclusively reconstructed vertex was selected. [...]
hep-ex/0303032; CERN-EP-2002-078; CERN-EP-2002-078.- Geneva : CERN, 2003 - 34 p. - Published in : Eur. Phys. J. C 28 (2003) 155-173 Fulltext: ep-2002-078 - PDF; 0303032 - PDF; arXiv:hep-ex_0303032 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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7.
(57)
Measurement of the $B^0_s$ Lifetime and Study of $B^0_s - \overline{B^0_s}$ Oscillations using $D_{s}l$ Events / DELPHI Collaboration
Lifetime and oscillations of $\Bs$ mesons have been studied in eventswith a large transverse momentum lepton and a $\Ds$ of opposite electric charge>the same hemisphere, selected from about 3.6 million hadronic $\Zz$decays accumulated by DELPHI between 1992 and 1995. \\The $\Bs$ lifetime and the fractional width difference between the two physical>
hep-ex/0107077; CERN-EP-2000-043; CERN-EP-2000-043.- Geneva : CERN, 2000 - 47 p. - Published in : Eur. Phys. J. C 16 (2000) 555-578 Fulltext: ep-2000-043 - PDF; arXiv:hep-ex_0107077 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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8.
(57)
A Study of the Lorentz Structure in $\tau$ Decays / DELPHI Collaboration
This paper describes a measurement of the Michel parameters, $\eta$, $\rho$, $\xi$, $\xi \delta$, and the average $\nu_{\tau}$helicity, $h_{\nu_{\tau}}$, in $\tau$ lepton decays together withthe first measurement of the tensor coupling in the weak charged current.The $\tau^{+} \tau^{-}$ pairs were produced at the LEP $\mathrm{e^{+} e^{-}}$collider at CERN from 1992 through 1995 in the DELPHI detector.Assuming lepton universality in the decays of the $\tau$ the measured valuesof the parameters were:$\eta = -0.005 \pm 0.036 \pm 0.037$,$\rho = 0.775 \pm 0.023 \pm 0.020$,$\xi = 0.929 \pm 0.070 \pm 0.030$,$\xi\delta = 0.779 \pm 0.070 \pm 0.028$, $h_{\nu_{\tau}} = -0.997 \pm 0.027 \pm 0.011$.The strength of the tensor coupling was measured to be $\kappa^W_\tau = -0.029\pm 0.036 \pm 0.018$. The first error is statistical and the second erroris systematic in all cases.The results are consistent with the $V\!-\!A$ structure of the weak chargedcurrent in decays of the $\tau$ lepton..
hep-ex/0107076; CERN-EP-2000-027; CERN-EP-2000-027.- Geneva : CERN, 2000 - 38 p. - Published in : Eur. Phys. J. C 16 (2000) 229-252 Fulltext: ep-2000-027 - PDF; arXiv:hep-ex_0107076 - PDF; External link: Preprint
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.e-page 278 - Please contact the library if you need to access this document.
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9.
(53)
Measurement of the semileptonic b branching fractions and average b mixing parameter in Z decays / DELPHI Collaboration
The semileptonic branching fractions for primary and cascade b decays BR(b -> lepton-), BR(b -> c -> lepton+) and BR(b -> cbar -> lepton-) were measured in hadronic Z decays collected by the DELPHI experiment at LEP. The sample was enriched in b decays using the lifetime information and various techniques were used to separate leptons from direct or cascade b decays [...]
hep-ex/0105080; CERN-EP-2000-157; CERN-EP-2000-157.- Geneva : CERN, 2001 - 40 p. - Published in : Eur. Phys. J. C 20 (2001) 455-478 Fulltext: arXiv:hep-ex_0105080 - PDF; ep-2000-157 - PDF; External link: Preprint
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.e-page 408 - Please contact the library if you need to access this document.
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10.
(53)
A Precise Measurement of the Tau Lifetime / DELPHI Collaboration
The tau lepton lifetime has been measured with the e+e- -> tau+tau- events collected by the DELPHI detector at LEP in the years 1991-1995. Three different methods have been exploited, using both one-prong and three-prong tau decay channels. [...]
hep-ex/0410010; CERN-EP-2003-070; CERN-EP-2003-070.- Geneva : CERN, 2004 - 27 p. - Published in : Eur. Phys. J. C 36 (2004) 283-296 Fulltext: ep-2003-070 - PDF; arXiv:hep-ex_0410010 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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