CERN Accelerating science

Home > Search Results: recid:436746
Search Tips
Advanced Search
Add to Search +
Search collections:
Sort by: Display results: Output format:
CERN Document Server 2,046 records found  1 - 10nextend  jump to record: Search took 1.13 seconds. 
1.
(100)
A measurement of the $\tau$ mass and the first CPT test with $\tau$ leptons / OPAL Collaboration
We measure the mass of the tau lepton to be 1775.1+-1.6(stat)+-1.0(sys t.) MeV using tau pairs from Z0 decays. To test CPT invariance we compare the masses of the positively and negatively charged tau leptons. [...]
hep-ex/0005009; CERN-EP-2000-056; CERN-EP-2000-056.- Geneva : CERN, 2000 - 13 p. - Published in : Phys. Lett. B 492 (2000) 23-31 Fulltext: arXiv:hep-ex_0005009 - PDF; 0005009 - PDF; External link: Preprint - Please contact the library if you need to access this document.
Detailed record - Similar records
2.
(91)
An upper limit for the $\tau$-neutrino mass from $\tau \to 5\pi^{\pm} \nu_{\tau}$ decays / OPAL Collaboration
An upper limit for the tau-neutrino mass has been determined from the decay tau -> 5pi+- \nu_tau using data collected with the OPAL detector from 1991 to 1995 in e+e- collisions at \sqrt{s} ~ M_Z. A limit of 43.2 MeV at 95% CL is obtained using a two-dimensional method in the 5pi invariant mass and energy distribution from 22 selected events. [...]
hep-ex/9806035; CERN-EP-98-055; CERN-EP-98-55; CERN-EP-98-055.- Geneva : CERN, 1998 - 17 p. - Published in : Eur. Phys. J. C 5 (1998) 229-237 Fulltext: 9806035 - PDF; arXiv:hep-ex_9806035 - PDF; External link: Preprint - Please contact the library if you need to access this document.
Detailed record - Similar records
3.
(90)
A Study of One-Prong Tau Decays with a Charged Kaon / OPAL Collaboration
From an analysis of the ionisation energy loss of charged particles selected from 110326 e+e- -> tau+tau- candidates recorded by the OPAL detector at e+e- centre-of-mass energies near the Z0 resonance, we determine the one-prong tau decay branching ratios: Br(tau- -> nu_tau K- >=0h0) = 1.528 +- 0.039 +- 0.040 % Br(tau- -> nu_tau K-) = 0.658 +- 0.024 +- 0.029 % where the h0 notation refers to a pi0, an eta, a K^0_S, or a K^0_L, and where the first uncertainty is statistical and the second is systematic..
hep-ex/0009017; CERN-EP-2000-091; OPAL-PR-315; CERN-EP-2000-091.- Geneva : CERN, 2001 - 31 p. - Published in : Eur. Phys. J. C 19 (2001) 653-665 Fulltext: 0009017 - PDF; arXiv:hep-ex_0009017 - PDF; External link: Preprint - Please contact the library if you need to access this document.
Detailed record - Similar records
4.
(90)
$\tau$ decays with neutral kaons / OPAL Collaboration
The branching ratio of the tau lepton to a neutral K meson is measured from a sample of approximately 200,000 tau decays recorded by the OPAL detector at centre-of-mass energies near the Z0 resonance. The measurement is based on two samples which identify one-prong tau decays with KL and KS mesons. [...]
hep-ex/9911029; CERN-EP-99-154; CERN-EP-99-154.- Geneva : CERN, 2000 - 22 p. - Published in : Eur. Phys. J. C 13 (2000) 213-23 Fulltext: arXiv:hep-ex_9911029 - PDF; 9911029 - PDF; External link: Preprint - Please contact the library if you need to access this document.
Detailed record - Similar records
5.
(89)
Measurement of the Branching Ratio for $D_{s} \to \tau\nu_{\tau}$ Decays / OPAL Collaboration
Using about 3.9 million hadronic Z decays from e+e- collisions recorded by the OPAL detector at LEP at centre-of-mass energies near MZ the branching ratio for the decay D_s -> tau nu_tau has been measured to be (7.0 +/- 2.1(stat) +/- 2.0 (syst))%. This result can be used to derive the decay constant of the D_s meson: f(D_s) = 286 +/- 44(stat) +/- 41(syst) MeV..
hep-ex/0103012; CERN-EP-2001-019; CERN-EP-2001-019.- Geneva : CERN, 2001 - 23 p. - Published in : Phys. Lett. B 516 (2001) 236-248 Fulltext: 0103012 - PDF; arXiv:hep-ex_0103012 - PDF; External link: Preprint - Please contact the library if you need to access this document.
Detailed record - Similar records
6.
(85)
A measurement of the $\tau^{-} \to e^{-} \overline{\nu}_{e}\nu_{\tau}$ branching ratio / OPAL Collaboration
The branching ratio for the decay tau->e nue nutau has been measured using Z0 decay data collected by the OPAL experiment at LEP. In total 33073 tau->e nue nutau candidates were identified from a sample of 186197 selected tau decays, giving a branching ratio of 17.81 +- 0.09(stat) +_ 0.06(sys)%. [...]
hep-ex/9812017; CERN-EP-98-175; CERN-EP-98-175.- Geneva : CERN, 1999 - 17 p. - Published in : Phys. Lett. B 447 (1999) 134-146 Fulltext: arXiv:hep-ex_9812017 - PDF; 9812017 - PDF; External link: Preprint - Please contact the library if you need to access this document.
Detailed record - Similar records
7.
(84)
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.
Detailed record - Similar records
8.
(84)
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.
Detailed record - Similar records
9.
(83)
Search for Lepton Flavour Violation in $e^+e^-$ Collisions at $\sqrt{s}$ = 189 - 209 GeV / OPAL Collaboration
We search for lepton flavour violating events (e mu, e tau and mu tau) that could be directly produced in e+e- annihilations, using the full available data sample collected with the OPAL detector at centre-of-mass energies between 189 GeV and 209 GeV. In general, the Standard Model expectations describe the data well for all the channels and at each sqrt(s). [...]
hep-ex/0109011; CERN-EP-2001-061; CERN-EP-2001-061.- Geneva : CERN, 2001 - 16 p. - Published in : Phys. Lett. B 519 (2001) 23-32 Fulltext: S0370269301010863 - XML; arXiv:hep-ex_0109011 - PDF; 0109011 - PDF; External link: Preprint - Please contact the library if you need to access this document.
Detailed record - Similar records
10.
(82)
Bose-Einstein Correlations of $\pi^{0}$ Pairs from Hadronic $Z^{0}$ Decays / OPAL Collaboration
We observed Bose-Einstein correlation in pi0 pairs produced in Z0 decays using the data sample collected by the OPAL detector at LEP 1 from 1991 to 1995. Using a static Gaussian picture for the pion emitter source, we obtain the chaoticity parameter lambda = 0.55 +- 0.10 +- 0.10 and the source radius R = (0.59 +- 0.08 +- 0.05) fm. [...]
hep-ex/0302027; CERN-EP-2003-005; CERN-EP-2003-005.- Geneva : CERN, 2003 - 19 p. - Published in : Phys. Lett. B 559 (2003) 131-143 Fulltext: arXiv:hep-ex_0302027 - PDF; ep-2003-005 - PDF; S037026930300337X - XML; External link: Preprint - Please contact the library if you need to access this document.
Detailed record - Similar records

Haven't found what you were looking for? Try your search on other servers:
recid:436746 in Amazon
recid:436746 in CERN EDMS
recid:436746 in CERN Intranet
recid:436746 in CiteSeer
recid:436746 in Google Books
recid:436746 in Google Scholar
recid:436746 in Google Web
recid:436746 in IEC		recid:436746 in IHS
recid:436746 in INSPIRE
recid:436746 in ISO
recid:436746 in KISS Books/Journals
recid:436746 in KISS Preprints
recid:436746 in NEBIS
recid:436746 in SLAC Library Catalog