CERN Accelerating science

000376591 001__ 376591
000376591 003__ SzGeCERN
000376591 005__ 20211029042915.0
000376591 0248_ $$aoai:cds.cern.ch:376591$$pcerncds:hep-ex$$pcerncds:CERN$$pcerncds:CERN:FULLTEXT$$pcerncds:FULLTEXT
000376591 0247_ $$2DOI$$a10.1016/S0370-2693(99)00309-3
000376591 035__ $$9CERN annual report$$a1999-3.0195
000376591 035__ $$9SLAC$$a3936260
000376591 035__ $$9SPIRES$$a3936260
000376591 035__ $$9arXiv$$aoai:arXiv.org:hep-ex/9901019
000376591 035__ $$9Inspire$$a482314
000376591 037__ $$9arXiv$$ahep-ex/9901019$$chep-ex
000376591 037__ $$aCERN-PPE-98-196
000376591 037__ $$aCERN-PPE-98-0196
000376591 037__ $$aCERN-EP-98-196
000376591 041__ $$aeng
000376591 084__ $$2CERN Library$$aEP-1998-196
000376591 088__ $$99901019
000376591 088__ $$aCERN-EP-98-196
000376591 100__ $$aAbbiendi, G.
000376591 245__ $$aColour reconnection studies in $e^{+}e^{-} \to W^{+}W^{-}$ at $\sqrt{s}$=183 GeV
000376591 260__ $$c1999
000376591 269__ $$aGeneva$$bCERN$$c10 Dec 1998
000376591 300__ $$a21 p
000376591 340__ $$apaper
000376591 500__ $$9arXiv$$a20 pages, LaTeX, 4 eps figures included, submitted to Physics Letters B
000376591 520__ $$aThe predicted effects of final state interactions such as colour reconnection are investigated by measuring properties of hadronic decays of W bosons, recorded at a centre-of-mass energy of sqrt(s)=182.7 GeV in the OPAL detector at LEP. Dependence on the modelling of hadronic W decays is avoided by comparing W+W- -> qqqq events with the non-leptonic component of W+W- -> qqlnu events. The scaled momentum distribution, its mean value, x_p, and that of the charged particle multiplicity, n_ch, are measured and found to be consistent in the two channels. The measured differences are: Diff(x_p) = +0.7 +- 0.8 +- 0.6 and Diff(n_ch) = (-0.09 +- 0.09 +-0.05)*10**-2. In addition, measurements of rapidity and thrust are performed for W+W- -> qqqq events. The data are described well by standard QCD models and disfavour one model of colour reconnection within the ARIADNE program. The current implementation of the ELLIS-GEIGER model of colour reconnection is excluded. At the current level of statistical precision no evidence for colour reconnection effects was found in the observables studied. The predicted effect of colour reconnection on OPAL measurements of M_W is also quantified in the context of models studied.
000376591 520__ $$aThe predicted effects of final state interactions such as colour reconnection are investigated by measuring properties of hadronic decays of W bosons, recorded at a centre-of-mass energy of sqrt(s)=182.7 GeV in the OPAL detector at LEP. Dependence on the modelling of hadronic W decays is avoided by comparing W+W- -> qqqq events with the non-leptonic component of W+W- -> qqlnu events. The scaled momentum distribution, its mean value, x_p, and that of the charged particle multiplicity, n_ch, are measured and found to be consistent in the two channels. The measured differences are: Diff(x_p) = +0.7 +- 0.8 +- 0.6 and Diff(n_ch) = (-0.09 +- 0.09 +-0.05)*10**-2. In addition, measurements of rapidity and thrust are performed for W+W- -> qqqq events. The data are described well by standard QCD models and disfavour one model of colour reconnection within the ARIADNE program. The current implementation of the ELLIS-GEIGER model of colour reconnection is excluded. At the current level of statistical precision no evidence for colour reconnection effects was found in the observables studied. The predicted effect of colour reconnection on OPAL measurements of M_W is also quantified in the context of models studied.
000376591 520__ $$9HEPDATA$$hCERN-LEP. Colour reconnection studies in E+ E- --> W+ W-.
000376591 520__ $$aThe predicted effects of final state interactions such as colour reconnection are investigated by measuring properties of hadronic decays of W bosons, recorded at a centre-of-mass energy of sqrt(s)=182.7 GeV in the OPAL detector at LEP. Dependence on the modelling of hadronic W decays is avoided by comparing W+W- -> qqqq events with the non-leptonic component of W+W- -> qqlnu events. The scaled momentum distribution, its mean value, x_p, and that of the charged particle multiplicity, n_ch, are measured and found to be consistent in the two channels. The measured differences are: Diff(x_p) = +0.7 +- 0.8 +- 0.6 and Diff(n_ch) = (-0.09 +- 0.09 +-0.05)*10**-2. In addition, measurements of rapidity and thrust are performed for W+W- -> qqqq events. The data are described well by standard QCD models and disfavour one model of 
000376591 520__ $$aThe predicted effects of final state interactions such as colour reconnection are investigated by measuring properties of hadronic decays of W bosons, recorded at a centre-of-mass energy of sqrt(s)=182.7 GeV in the OPAL detector at LEP. Dependence on the modelling of hadronic W decays is avoided by comparing W+W- -> qqqq events with the non-leptonic component of W+W- -> qqlnu events. The scaled momentum distribution, its mean value, x_p, and that of the charged particle multiplicity, n_ch, are measured and found to be consistent in the two channels. The measured differences are: Diff(x_p) = +0.7 +- 0.8 +- 0.6 and Diff(n_ch) = (-0.09 +- 0.09 +-0.05)*10**-2. In addition, measurements of rapidity and thrust are performed for W+W- -> qqqq events. The data are described well by standard QCD models and disfavour one model of colour reconnection within the ARIADNE program. The current implementation of the ELLIS-GEIGER model of colour reconnection is excluded. At the current level of statistical precision no evidence for colour reconnection effects was found in the observables studied. The predicted effect of colour reconnection on OPAL measurements of M_W is also quantified in the context of models studied.
000376591 520__ $$aThe predicted effects of final state interactions such as colour reconnection are investigated by measuring properties of hadronic decays of W bosons, recorded at a centre-of-mass energy of sqrt(s)=182.7 GeV in the OPAL detector at LEP. Dependence on the modelling of hadronic W decays is avoided by comparing W+W- -> qqqq events with the non-leptonic component of W+W- -> qqlnu events. The scaled momentum distribution, its mean value, x_p, and that of the charged particle multiplicity, n_ch, are measured and found to be consistent in the two channels. The measured differences are: Diff(x_p) = +0.7 +- 0.8 +- 0.6 and Diff(n_ch) = (-0.09 +- 0.09 +-0.05)*10**-2. In addition, measurements of rapidity and thrust are performed for W+W- -> qqqq events. The data are described well by standard QCD models and disfavour one model of colour reconnection within the ARIADNE program. The current implementation of the ELLIS-GEIGER model of colour reconnection is excluded. At the current level of statistical precision no evidence for colour reconnection effects was found in the observables studied. The predicted effect of colour reconnection on OPAL measurements of M_W is also quantified in the context of models studied.
000376591 520__ $$9Elsevier$$aThe predicted effects of final state interactions such as colour reconnection are investigated by measuring properties of hadronic decays of W bosons, recorded at a centre-of-mass energy of s ≃182.7 GeV in the OPAL detector at LEP. Dependence on the modelling of hadronic W decays is avoided by comparing W + W − → q q ′ q q ′ events with the non-leptonic component of W + W − → q q ′ ℓ ν ℓ events. The scaled momentum distribution, its mean value, 〈 x p 〉, and that of the charged particle multiplicity, 〈 n ch 〉, are measured and found to be consistent in the two channels. The measured differences are: Δ〈n ch 〉=〈n ch 4q 〉−2〈n ch qq ℓν 〉=+0.7±0.8±0.6 Δ〈x p 〉=〈x p 4q 〉−〈x p qq ℓν 〉=(−0.09±0.09±0.05)×10 −2 . In addition, measurements of rapidity and thrust are performed for W + W − → q q ′ q q ′ events. The data are described well by standard QCD models and disfavour one model of colour reconnection within the ARIADNE program. The current implementation of the Ellis-Geiger model of colour reconnection is excluded. At the current level of statistical precision no evidence for colour reconnection effects was found in the observables studied. The predicted effect of colour reconnection on OPAL measurements of M W is also quantified in the context of models studied.
000376591 542__ $$fCopyright @ unknown. Published by Elsevier B.V.
000376591 595__ $$aCERN-EP
000376591 595__ $$aLANL EDS
000376591 595__ $$aOA
000376591 595__ $$aSIS INSP99
000376591 65017 $$2SzGeCERN$$aParticle Physics - Experiment
000376591 6531_ $$9CERN$$aW+ W-
000376591 6531_ $$9CERN$$ae+ e-
000376591 690C_ $$aARTICLE
000376591 690C_ $$aCERN
000376591 693__ $$aCERN LEP$$eOPAL
000376591 695__ $$9LANL EDS$$aHigh Energy Physics - Experiment
000376591 697C_ $$aLexiW
000376591 700__ $$aAckerstaff, K.
000376591 700__ $$aAlexander, G.
000376591 700__ $$aAllison, John
000376591 700__ $$aAltekamp, N.
000376591 700__ $$aAnderson, K.J.
000376591 700__ $$aAnderson, S.
000376591 700__ $$aArcelli, S.
000376591 700__ $$aAsai, S.
000376591 700__ $$aAshby, S.F.
000376591 700__ $$aAxen, D.
000376591 700__ $$aAzuelos, G.
000376591 700__ $$aBall, A.H.
000376591 700__ $$aBarberio, E.
000376591 700__ $$aBarlow, Roger J.
000376591 700__ $$aBartoldus, R.
000376591 700__ $$aBatley, J.R.
000376591 700__ $$aBaumann, S.
000376591 700__ $$aBechtluft, J.
000376591 700__ $$aBehnke, T.
000376591 700__ $$aBell, Kenneth Watson
000376591 700__ $$aBella, G.
000376591 700__ $$aBellerive, A.
000376591 700__ $$aBentvelsen, S.
000376591 700__ $$aBethke, S.
000376591 700__ $$aBetts, S.
000376591 700__ $$aBiebel, O.
000376591 700__ $$aBiguzzi, A.
000376591 700__ $$aBird, S.D.
000376591 700__ $$aBlobel, V.
000376591 700__ $$aBloodworth, I.J.
000376591 700__ $$aBock, P.
000376591 700__ $$aBohme, J.
000376591 700__ $$aBonacorsi, D.
000376591 700__ $$aBoutemeur, M.
000376591 700__ $$aBraibant, S.
000376591 700__ $$aBright-Thomas, P.
000376591 700__ $$aBrigliadori, L.
000376591 700__ $$aBrown, Robert M.
000376591 700__ $$aBurckhart, H.J.
000376591 700__ $$aCapiluppi, P.
000376591 700__ $$aCarnegie, R.K.
000376591 700__ $$aCarter, A.A.
000376591 700__ $$aCarter, J.R.
000376591 700__ $$aChang, C.Y.
000376591 700__ $$aCharlton, David G.
000376591 700__ $$aChrisman, D.
000376591 700__ $$aCiocca, C.
000376591 700__ $$aClarke, P.E.L.
000376591 700__ $$aClay, E.
000376591 700__ $$aCohen, I.
000376591 700__ $$aConboy, J.E.
000376591 700__ $$aCooke, O.C.
000376591 700__ $$aCouyoumtzelis, C.
000376591 700__ $$aCoxe, R.L.
000376591 700__ $$aCuffiani, M.
000376591 700__ $$aDado, S.
000376591 700__ $$aDallavalle, G.Marco
000376591 700__ $$aDavis, R.
000376591 700__ $$aDe Jong, S.
000376591 700__ $$ade Roeck, A.
000376591 700__ $$aDervan, P.
000376591 700__ $$aDesch, K.
000376591 700__ $$aDienes, B.
000376591 700__ $$aDixit, M.S.
000376591 700__ $$aDubbert, J.
000376591 700__ $$aDuchovni, E.
000376591 700__ $$aDuckeck, G.
000376591 700__ $$aDuerdoth, I.P.
000376591 700__ $$aEatough, D.
000376591 700__ $$aEstabrooks, P.G.
000376591 700__ $$aEtzion, E.
000376591 700__ $$aFabbri, F.
000376591 700__ $$aFanti, M.
000376591 700__ $$aFaust, A.A.
000376591 700__ $$aFiedler, F.
000376591 700__ $$aFierro, M.
000376591 700__ $$aFleck, I.
000376591 700__ $$aFolman, R.
000376591 700__ $$aFurtjes, A.
000376591 700__ $$aFutyan, D.I.
000376591 700__ $$aGagnon, P.
000376591 700__ $$aGary, J.W.
000376591 700__ $$aGascon, J.
000376591 700__ $$aGascon-Shotkin, S.M.
000376591 700__ $$aGaycken, G.
000376591 700__ $$aGeich-Gimbel, C.
000376591 700__ $$aGiacomelli, G.
000376591 700__ $$aGiacomelli, P.
000376591 700__ $$aGibson, V.
000376591 700__ $$aGibson, W.R.
000376591 700__ $$aGingrich, D.M.
000376591 700__ $$aGlenzinski, D.
000376591 700__ $$aGoldberg, J.
000376591 700__ $$aGorn, W.
000376591 700__ $$aGrandi, C.
000376591 700__ $$aGraham, K.
000376591 700__ $$aGross, E.
000376591 700__ $$aGrunhaus, J.
000376591 700__ $$aGruwe, M.
000376591 700__ $$aHanson, G.G.
000376591 700__ $$aHansroul, M.
000376591 700__ $$aHapke, M.
000376591 700__ $$aHarder, K.
000376591 700__ $$aHarel, A.
000376591 700__ $$aHargrove, C.K.
000376591 700__ $$aHartmann, C.
000376591 700__ $$aHauschild, M.
000376591 700__ $$aHawkes, C.M.
000376591 700__ $$aHawkings, R.
000376591 700__ $$aHemingway, R.J.
000376591 700__ $$aHerndon, M.
000376591 700__ $$aHerten, G.
000376591 700__ $$aHeuer, R.D.
000376591 700__ $$aHildreth, M.D.
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000376591 700__ $$aHoch, M.
000376591 700__ $$aHocker, James Andrew
000376591 700__ $$aHoffman, Kara Dion
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000376591 700__ $$aHonma, A.K.
000376591 700__ $$aHorvath, D.
000376591 700__ $$aHossain, K.R.
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000376591 700__ $$aHuntemeyer, P.
000376591 700__ $$aIgo-Kemenes, P.
000376591 700__ $$aImrie, D.C.
000376591 700__ $$aIshii, K.
000376591 700__ $$aJacob, F.R.
000376591 700__ $$aJawahery, A.
000376591 700__ $$aJeremie, H.
000376591 700__ $$aJimack, M.
000376591 700__ $$aJones, C.R.
000376591 700__ $$aJovanovic, P.
000376591 700__ $$aJunk, T.R.
000376591 700__ $$aKarlen, D.
000376591 700__ $$aKartvelishvili, V.
000376591 700__ $$aKawagoe, K.
000376591 700__ $$aKawamoto, T.
000376591 700__ $$aKayal, P.I.
000376591 700__ $$aKeeler, R.K.
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000376591 700__ $$aKennedy, B.W.
000376591 700__ $$aKim, D.H.
000376591 700__ $$aKlier, A.
000376591 700__ $$aKluth, S.
000376591 700__ $$aKobayashi, T.
000376591 700__ $$aKobel, M.
000376591 700__ $$aKoetke, D.S.
000376591 700__ $$aKokott, T.P.
000376591 700__ $$aKolrep, M.
000376591 700__ $$aKomamiya, S.
000376591 700__ $$aKowalewski, Robert V.
000376591 700__ $$aKress, T.
000376591 700__ $$aKrieger, P.
000376591 700__ $$avon Krogh, J.
000376591 700__ $$aKuhl, T.
000376591 700__ $$aKyberd, P.
000376591 700__ $$aLafferty, G.D.
000376591 700__ $$aLandsman, H.
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000376591 700__ $$aList, B.
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000376591 700__ $$aLloyd, A.W.
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000376591 700__ $$aMashimo, T.
000376591 700__ $$aMattig, Peter
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000376591 700__ $$aNagai, K.
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000376591 700__ $$aO'Neale, S.W.
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000376591 700__ $$aPalinkas, J.
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000376591 700__ $$aRembser, C.
000376591 700__ $$aRick, H.
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000376591 700__ $$aRossi, A.M.
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000376591 700__ $$aSchaile, O.
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000376591 700__ $$aScharff-Hansen, P.
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000376591 700__ $$aSchoning, A.
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000376591 700__ $$aSchwick, C.
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000376591 700__ $$aShears, T.G.
000376591 700__ $$aShen, B.C.
000376591 700__ $$aShepherd-Themistocleous, C.H.
000376591 700__ $$aSherwood, P.
000376591 700__ $$aSiroli, G.P.
000376591 700__ $$aSittler, A.
000376591 700__ $$aSkuja, A.
000376591 700__ $$aSmith, A.M.
000376591 700__ $$aSnow, G.A.
000376591 700__ $$aSobie, R.
000376591 700__ $$aSoldner-Rembold, S.
000376591 700__ $$aSpagnolo, S.
000376591 700__ $$aSproston, M.
000376591 700__ $$aStahl, A.
000376591 700__ $$aStephens, K.
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000376591 700__ $$aStoll, K.
000376591 700__ $$aStrom, David M.
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000376591 700__ $$aTaras, P.
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000376591 700__ $$aThiergen, M.
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000376591 700__ $$avon Torne, E.
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000376591 700__ $$aTurner-Watson, M.F.
000376591 700__ $$aUeda, I.
000376591 700__ $$aVan Kooten, Rick J.
000376591 700__ $$aVannerem, P.
000376591 700__ $$aVerzocchi, M.
000376591 700__ $$aVoss, H.
000376591 700__ $$aWackerle, F.
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000376591 700__ $$aWatkins, P.M.
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000376591 700__ $$aWhite, J.S.
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000376591 710__ $$gOPAL Collaboration
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000376591 773__ $$c153-8$$n1-2$$pPhys. Lett. B$$v453$$y1999
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000376591 859__ [email protected]
000376591 8564_ $$uhttp://weblib.cern.ch/abstract?CERN-PPE-98-0196$$yPreprint
000376591 8564_ $$81240682$$s278289$$uhttps://cds.cern.ch/record/376591/files/arXiv:hep-ex_9901019.pdf
000376591 8564_ $$81240681$$s14571$$uhttps://cds.cern.ch/record/376591/files/pr267_04.png$$y00003 Corrected rapidity distribution for \WWqqqq\ events. Points indicate the data, with statistical (horizontal bars) and systematic uncertainties added in quadrature. Point to point correlations exist in the systematic uncertainties. Predictions of various Monte Carlo models (with and without colour reconnection) are shown as smooth curves. \VNI\ predictions correspond to the colour singlet variant of the \EG\ model. All models are normalised to the measured \nchQQQQ. \SK\ and \ARMII\ models are not shown as they are essentially indistinguishable from \KORALW.
000376591 8564_ $$81240683$$s30158$$uhttps://cds.cern.ch/record/376591/files/pr267_01.png$$y00000 Uncorrected charged multiplicity distributions for (a) \WWqqqq\ events and (b) the hadronic part of \WWqqln\ events. Points indicate the data, smooth curves show the expected sum of signal and background contributions for a variety of signal models, and the hatched histogram shows the expected background. Predictions of \KORALW, \PYTHIA\ and \EXCALIBUR\ are indistinguishable from one another.
000376591 8564_ $$81240684$$s37418$$uhttps://cds.cern.ch/record/376591/files/pr267_02.png$$y00001 Uncorrected charged multiplicity distributions for \WWqqqq\ events, compared with (a) \PYTHIA\ and the three \SK\ models of colour reconnection, and (b) \ARIADNE\ and \EG\ (colour blind) models of colour reconnection. Similarly, (c) compares the uncorrected thrust distribution for \WWqqqq\ events with a selection of the models, with and without colour reconnection. Points indicate the data, smooth curves show the expected sum of signal and background contributions for a variety of signal models, and the hatched histogram shows the expected background.
000376591 8564_ $$81240685$$s31108$$uhttps://cds.cern.ch/record/376591/files/pr267_03.png$$y00002 Corrected \protect\xp\ distributions for (a) \WWqqqq\ events, (b) the hadronic part of \WWqqln\ events and (c) the ratio of the \WWqqqq\ distribution to twice the \WWqqln\ distribution. Points indicate the data, with statistical (horizontal bars) and systematic uncertainties added in quadrature. Point to point correlations exist in the systematic uncertainties. Predictions of various Monte Carlo models (with and without colour reconnection) are shown as smooth curves. \VNI\ predictions correspond to the colour singlet variant of the \EG\ model. \SK\ and \ARMII\ models are not shown as they are essentially indistinguishable from \KORALW.
000376591 8564_ $$860214$$s212109$$uhttps://cds.cern.ch/record/376591/files/9901019.ps.gz$$yFulltext
000376591 8564_ $$860214$$s406735$$uhttps://cds.cern.ch/record/376591/files/9901019.pdf$$yFulltext
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