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CERN Accelerating science

OPAL Conference Proceedings

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2018-01-10
06:52
Measurement of the branching fractions and forward-backward asymmetries of the Z0 into light quarks / Grandi, Claudio (Bologna U.)
Using approximately 4.3 million hadronic Z0 decays collected with the OPAL detector at LEP between 1990 and 1995, we measure the branching fractions of the zo into up-type and down-type light quarks, Rq, and the forward-backward asymmetries, AFB (q) . High-momentum stable particles are used to tag parton flavours and double tagged events are used to determine the flavour tagging efficiencies. [...]
1997 - 4 p. - Published in : (1997) , pp. 145-148 Fulltext: PDF;
In : 32nd Rencontres de Moriond : Leptonic Session, Les Arcs, France, 15 - 22 Mar 1997, pp.145-148

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2018-01-09
06:36
Study of Phi(1020), D*+- and B* spin alignment in hadronic Z0 decays / Robins, S (Technion) /OPAL
1997 - 2 p. - Published in : (1997) , pp. 315-316 Fulltext: PDF;
In : 32nd Rencontres de Moriond, Les Arcs, France, 22 - 29 Mar 1997, pp.315-316

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2018-01-09
06:36
Jet rates in e+ e- annihilation between s**(1/2) = 22-GeV and 172-GeV / Pfeifenschneider, P (Aachen, Tech. Hochsch.) /OPAL
1997 - 2 p. - Published in : (1997) , pp. 305-306 Fulltext: PDF;
In : 32nd Rencontres de Moriond, Les Arcs, France, 22 - 29 Mar 1997, pp.305-306

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2018-01-09
06:36
Search for new physics at LEP 2 / Gross, Eilam (Weizmann Inst.)
The results of the search for Higgs bosons, Charginos, Neutralinos, Sleptons, Squarks and light Gravitinos with the LEP accelerator at 130-172 GeV center-of-mass energy are briefly described. Prospects for Standard Model Higgs search at higher center-of-mass energies are also given..
1997 - 8 p. - Published in : (1997) , pp. 15-22 Fulltext: PDF;
In : 32nd Rencontres de Moriond, Les Arcs, France, 22 - 29 Mar 1997, pp.15-22

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2018-01-06
06:00
Higgs Searches at LEP2 / Isamu, Nakamura (JSPS, Tokyo)
Searches for Higgs bosons are reported. The searches are performed based on the data coilected by the four LEP experiments ALEPH, DELPHI, L3, and OPAL at a center-of-mass energy of 189 GeV. [...]
Hanoi : The Gioi, 2001 - 4 p. - Published in : , pp. 375-378 Fulltext: PDF;
In : 34th Rencontres de Moriond, Les Arcs, France, 20 - 27 Mar 1999, pp.375-378

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2017-12-08
06:44
Difermion Cross-sections At LEPII / Sachs, K (Freiburg U.)
Precision measurements at LEPII provide a unique test of Standard Model predictions. Re­sults from the four LEP collaborations ALEPH, DELPIII, L3 and OPAL on the difermion cross sections and asymmetries obtained at centre-of- mass energies between 192 and 202 GeV are presented. [...]
Hanoi : The Gioi, 2001 - 8 p. - Published in : , pp. 405-412 Fulltext: PDF;
In : 35th Rencontres de Moriond: Electroweak Interactions and Unified Theories, Les Arcs, France, 11 - 18 Mar 2000, pp.405-412

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2017-12-08
06:44
LEP II Boson Cross-sections And Couplings / Sbarra, C (Victoria U.) /OPAL
Measurements performed at LEP of W-pair, Z-pair and single W production cross- sections up to 202 GeV centre-of-mass energy are presented, together with measurements of the trilinear gauge boson couplings predicted by the Standard Model, namely the WWZ and $WW\gamma$ vertices. In addition, limits are set to possible anomalous couplings among three neutral gauge bosons as well as among four gauge bosons..
Hanoi : The Gioi, 2001 - 8 p. - Published in : , pp. 339-346 Fulltext: PDF;
In : 35th Rencontres de Moriond: Electroweak Interactions and Unified Theories, Les Arcs, France, 11 - 18 Mar 2000, pp.339-346

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2017-12-08
06:44
Measurement of the mass of the W boson at LEP and determination of electroweak parameters / Straessner, A (Aachen, Tech. Hochsch.)
Precise measurements of the W mass and width performed at LEP are presented, which yield $M_W$ = 80.427 ± 0.046 GeV and $Γ_W$ = 2.12 ± 0.11 GeV. A comparison is made between this direct determination and the W mass value obtained indirectly in an analysis of other electroweak measurements. [...]
2002 - 9 p. - Published in : Subnucl. Ser.: 38 (2002) , pp. 647-655
- Published in : , pp. 535-364 Fulltext: PDF;

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2017-12-05
06:20
Measurement of the W mass at LEP2 / Parkes, Chris J (Liverpool U.) /LEP
2000 - 5 p. - Published in : , pp. 205-209 fulltext: PDF;
In : 35th Rencontres de Moriond, Les Arcs, France, 18 - 25 Mar 2000, pp.205-209

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2017-12-05
06:20
Bose-Einstein correlations in W+ W- events at LEP2 / van Dalen, Jorn A (Nijmegen U.)
Analyses of Bose-Einstein Correlations in w+w- events at LEP2 by the four LEP collaborations are presented. In particular, Bose-Einstein correlations in w+w- overlap are investigated and the possible existence of these correlations between particles coming from different W's, which may influence the W mass measurements in the fully-hadronic channel e+e- --+ w+w- --+ qiihq3ij<. [...]
2000 - 6 p. - Published in : , pp. 233-238 fulltext: PDF;
In : 35th Rencontres de Moriond, Les Arcs, France, 18 - 25 Mar 2000, pp.233-238

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