CERN Accelerating science

OPAL Conference Proceedings

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2018-06-13
06:11
Analysis of small angle Bhabha scattering at LEP / Lee, A (Maryland U.) /OPAL
1992 - 6 p. - Published in : (1992) , pp. 43-48 Fulltext: PDF;
In : 27th Rencontres de Moriond : Leptonic Session, Les Arcs, France, 15 - 22 Mar 1992, pp.43-48

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2018-04-20
06:05
Searches for GMSB at √s = 189 GeV at LEP / Taylor, Gary (UC, Santa Cruz)
Searches for Gauge Mediated Supersymmetry Breaking topologies are performed on 170 pb−1 of data collected at a centre of mass energy of 188.6 GeV by each of the four LEP experiments. No evidence for such processes is found, allowing 95% C.L. lower limits to be set on the masses of various particles in the context of GMSB. [...]
- Published in : , pp. 7.12 Fulltext: PDF; External link: Fulltext
In : Meeting of the Division of Particles and Fields (DPF) of the American Physical Society (APS), Los Angeles, CA, USA, 6 - 9 Jan 1999, pp.7.12

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2018-03-29
17:40
Search for the Standard Model Higgs Boson at LEP /DELPHI Collaboration ; ALEPH Collaboration ; L3 Collaboration ; OPAL Collaboration
The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have collected 2461 pb−1 of e+e− collision data at centre-of-mass energies between 189 and 209 GeV, of which 536 pb−1 have energies above 206 GeV. The data have been used to search for the Standard Model Higgs boson. [...]
CERN-ALEPH-2002-024; CERN-ALEPH-CONF-2002-013; DELPHI-2002-088-CONF-621; CERN-DELPHI-2002-088-CONF-621; L3-Note-2766; OPAL-TN721; LHWG-Note-2002-01.- Geneva : CERN, 2002 - 28 p. Fulltext: cer-002264432 - PDF; aleph-2002-024 - PDF;
In : 31st International Conference on High Energy Physics, Amsterdam, The Netherlands, 25 - 31 Jul 2002

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2018-03-01
06:11
Prompt photon production in hadronic events at LEP / Boutigny, D (Annecy, LAPP)
We review some recent results on photon emission off quarks obtained by the four LEP experiments. These experimental results are compared to different Monte-Carlo predictions and to an exact matrix element calculation at the order (ems). [...]
1992 - 6 p. - Published in : (1992) , pp. 37-42 Fulltext: PDF;
In : 27th Rencontres de Moriond : Hadronic Session, Les Arcs, France, 22 - 28 Mar 1992, pp.37-42

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2018-02-21
06:04
LEP precision results / Kawamoto, T (Tokyo U., ICEPP)
Precision measurements at LEP are reviewed, with main focus on the electroweak measurements and tests of the Standard Model. [...]
2001. - 23 p.
Full text - Fulltext

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2018-02-21
06:04
LEP W measurements / Saeki, Takayuki (Tokyo U., ICEPP)
In June 1996, the LEP center-of-mass energy was raised to 161 GeV, just above the threshold of pair-production of W bosons, and LEP2 experiments started. [...]
2001. - 35 p.
Full text - Fulltext

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2018-02-21
06:04
LEP Higgs / Mori, T (Tokyo U., ICEPP)
LEP had long been the only place where the Higgs boson could be unambiguously searched for. As the LEP experiments verified the gauge interactions more and more rigorously, searches for the Higgs boson, which forms the very basis of the gauge theories, were taking on more and more importance in LEP physics. [...]
2001. - 15 p.
Full text - Fulltext

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2018-01-31
07:36
Photon radiation from quarks at LEP / Thompson, J C (Rutherford)
Earlier measurements at LEP of isolated hard photons in hadronic zo decays attributed to radiation from primary quark pairs, have been extended in the ALEPH experiment to include their production inside hadron jets. Events are selected where all particles combine "democratically" to form 2 hadron jets, one of which contains a photon with a fractional energy z � 0. [...]
1994 - 6 p. - Published in : (1994) , pp. 45-50 Fulltext: PDF;
In : 29th Rencontres de Moriond : Hadronic Session, Méribel-lès-Allues, France, 19 - 26 Mar 1994, pp.45-50

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2018-01-30
07:15
Measurement of tau lepton decays to kaons at OPAL / Ward, C P (Cambridge U.) /OPAL
1995 - 4 p. - Published in : (1995) , pp. 207-210 Fulltext: PDF;
In : 30th Rencontres de Moriond : Leptonic Session, Les Arcs, France, 11 - 18 Mar 1995, pp.207-210

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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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