Abstract
The 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-→qq̄′qq̄′ events with the non-leptonic component of W+W-→qq̄′ℓv̄ℓ events. The scaled momentum distribution, its mean value, 〈xp〉, and that of the charged particle multiplicity, 〈nch〉, are measured and found to be consistent in the two channels. The measured differences are: Δ〈nch〉 = 〈nch4q〉 - 2〈nchqqℓv〉 = +0.7 ± 0.6 Δ〈xp〉 = 〈xp4q〉 - 〈xpqqℓv〉 = (-0.09 ± 0.09 ± 0.05) × 10-2 In addition, measurements of rapidity and thrust are performed for W+W-→ qq̄′qq̄′ 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 MW is also quantified in the context of models studied.
| Original language | English |
|---|---|
| Pages (from-to) | 153-168 |
| Number of pages | 16 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 453 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 1999 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
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In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 453, No. 1-2, 1999, p. 153-168.
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Colour reconnection studies in e+e-→W+W- at √s = 183 GeV
AU - Abbiendi, G.
AU - Ackerstaff, K.
AU - Alexander, G.
AU - Allison, J.
AU - Altekamp, N.
AU - Anderson, K. J.
AU - Anderson, S.
AU - Arcelli, S.
AU - Asai, S.
AU - Ashby, S. F.
AU - Axen, D.
AU - Azuelos, G.
AU - Ball, A. H.
AU - Barberio, E.
AU - Barlow, R. J.
AU - Bartoldus, R.
AU - Batley, J. R.
AU - Baumann, S.
AU - Bechtluft, J.
AU - Behnke, T.
AU - Bell, K. W.
AU - Bella, G.
AU - Bellerive, A.
AU - Bentvelsen, S.
AU - Bethke, S.
AU - Betts, S.
AU - Biebel, O.
AU - Biguzzi, A.
AU - Bird, S. D.
AU - Blobel, V.
AU - Bloodworth, I. J.
AU - Bock, P.
AU - Böhme, J.
AU - Bonacorsi, D.
AU - Boutemeur, M.
AU - Braibant, S.
AU - Bright-Thomas, P.
AU - Brigliadori, L.
AU - Brown, R. M.
AU - Burckhart, H. J.
AU - Capiluppi, P.
AU - Carnegie, R. K.
AU - Carter, A. A.
AU - Carter, J. R.
AU - Chang, C. Y.
AU - Charlton, D. G.
AU - Chrisman, D.
AU - Ciocca, C.
AU - Clarke, P. E.L.
AU - Clay, E.
AU - Cohen, I.
AU - Conboy, J. E.
AU - Cooke, O. C.
AU - Couyoumtzelis, C.
AU - Coxe, R. L.
AU - Cuffiani, M.
AU - Dado, S.
AU - Dallavalle, G. M.
AU - Davis, R.
AU - de Jong, S.
AU - de Roeck, A.
AU - Dervan, P.
AU - Desch, K.
AU - Dienes, B.
AU - Dixit, M. S.
AU - Dubbert, J.
AU - Duchovni, E.
AU - Duckeck, G.
AU - Duerdoth, I. P.
AU - Eatough, D.
AU - Estabrooks, P. G.
AU - Etzion, E.
AU - Fabbri, F.
AU - Fanti, M.
AU - Faust, A. A.
AU - Fiedler, F.
AU - Fierro, M.
AU - Fleck, I.
AU - Folman, R.
AU - Fürtjes, A.
AU - Futyan, D. I.
AU - Gagnon, P.
AU - Gary, J. W.
AU - Gascon, J.
AU - Gascon-Shotkin, S. M.
AU - Gaycken, G.
AU - Geich-Gimbel, C.
AU - Giacomelli, G.
AU - Giacomelli, P.
AU - Gibson, V.
AU - Gibson, W. R.
AU - Gingrich, D. M.
AU - Glenzinski, D.
AU - Goldberg, J.
AU - Gorn, W.
AU - Grandi, C.
AU - Graham, K.
AU - Gross, E.
AU - Grunhaus, J.
AU - Gruwe, M.
AU - Hanson, G. G.
AU - Hansroul, M.
AU - Hapke, M.
AU - Harder, K.
AU - Harel, A.
AU - Hargrove, C. K.
AU - Hartmann, C.
AU - Hauschild, M.
AU - Hawkes, C. M.
AU - Hawkings, R.
AU - Hemingway, R. J.
AU - Herndon, M.
AU - Herten, G.
AU - Heuer, R. D.
AU - Hildreth, M. D.
AU - Hill, J. C.
AU - Hobson, P. R.
AU - Hoch, M.
AU - Hocker, A.
AU - Hoffman, K.
AU - Homer, R. J.
AU - Honma, A. K.
AU - Horváth, D.
AU - Hossain, K. R.
AU - Howard, R.
AU - Huntemeyer, P.
AU - Igo-Kemenes, P.
AU - Imrie, D. C.
AU - Ishii, K.
AU - Jacob, F. R.
AU - Jawahery, A.
AU - Jeremie, H.
AU - Jimack, M.
AU - Jones, C. R.
AU - Jovanovic, P.
AU - Junk, T. R.
AU - Karlen, D.
AU - Kartvelishvili, V.
AU - Kawagoe, K.
AU - Kawamoto, T.
AU - Kayal, P. I.
AU - Keeler, R. K.
AU - Kellogg, R. G.
AU - Kennedy, B. W.
AU - Kim, D. H.
AU - Klier, A.
AU - Kluth, S.
AU - Kobayashi, T.
AU - Kobel, M.
AU - Koetke, D. S.
AU - Kokott, T. P.
AU - Kolrep, M.
AU - Komamiya, S.
AU - Kowalewski, R. V.
AU - Kress, T.
AU - Krieger, P.
AU - von Krogh, J.
AU - Kuhl, T.
AU - Kyberd, P.
AU - Lafferty, G. D.
AU - Landsman, H.
AU - Lanske, D.
AU - Lauber, J.
AU - Lautenschlager, S. R.
AU - Lawson, I.
AU - Layter, J. G.
AU - Lazic, D.
AU - Lee, A. M.
AU - Lellouch, D.
AU - Letts, J.
AU - Levinson, L.
AU - Liebisch, R.
AU - List, B.
AU - Littlewood, C.
AU - Lloyd, A. W.
AU - Lloyd, S. L.
AU - Loebinger, F. K.
AU - Long, G. D.
AU - Losty, M. J.
AU - Ludwig, J.
AU - Liu, D.
AU - Macchiolo, A.
AU - Macpherson, A.
AU - Mader, W.
AU - Mannelli, M.
AU - Marcellini, S.
AU - Markopoulos, C.
AU - Martin, A. J.
AU - Martin, J. P.
AU - Martinez, G.
AU - Mashimo, T.
AU - Möttig, P.
AU - McDonald, W. J.
AU - McKenna, J.
AU - Mckigney, E. A.
AU - McMahon, T. J.
AU - McPherson, R. A.
AU - Meijers, F.
AU - Menke, S.
AU - Merritt, F. S.
AU - Mes, H.
AU - Meyer, J.
AU - Michelini, A.
AU - Mihara, S.
AU - Mikenberg, G.
AU - Miller, D. J.
AU - Mir, R.
AU - Mohr, W.
AU - Montanari, A.
AU - Mori, T.
AU - Nagai, K.
AU - Nakamura, I.
AU - Neal, H. A.
AU - Nellen, B.
AU - Nisius, R.
AU - O'Neale, S. W.
AU - Oakham, F. G.
AU - Odorici, F.
AU - Ogren, H. O.
AU - Oreglia, M. J.
AU - Orito, S.
AU - Pálinkás, J.
AU - Pásztor, G.
AU - Pater, J. R.
AU - Patrick, G. N.
AU - Patt, J.
AU - Perez-Ochoa, R.
AU - Petzold, S.
AU - Pfeifenschneider, P.
AU - Pilcher, J. E.
AU - Pinfold, J.
AU - Plane, D. E.
AU - Poffenberger, P.
AU - Polok, J.
AU - Przybycień, M.
AU - Rembser, C.
AU - Rick, H.
AU - Robertson, S.
AU - Robins, S. A.
AU - Rodning, N.
AU - Roney, J. M.
AU - Roscoe, K.
AU - Rossi, A. M.
AU - Rozen, Y.
AU - Runge, K.
AU - Runolfsson, O.
AU - Rust, D. R.
AU - Sachs, K.
AU - Saeki, T.
AU - Sahr, O.
AU - Sang, W. M.
AU - Sarkisyan, E. K.G.
AU - Sbarra, C.
AU - Schaile, A. D.
AU - Schaile, O.
AU - Scharf, F.
AU - Scharff-Hansen, P.
AU - Schieck, J.
AU - Schmitt, B.
AU - Schmitt, S.
AU - Schöning, A.
AU - Schroder, M.
AU - Schumacher, M.
AU - Schwick, C.
AU - Scott, W. G.
AU - Seuster, R.
AU - Shears, T. G.
AU - Shen, B. C.
AU - Shepherd-Themistocleous, C. H.
AU - Sherwood, P.
AU - Siroli, G. P.
AU - Sittler, A.
AU - Skuja, A.
AU - Smith, A. M.
AU - Snow, G. A.
AU - Sobie, R.
AU - Söldner-Rembold, S.
AU - Spagnolo, S.
AU - Sproston, M.
AU - Stahl, A.
AU - Stephens, K.
AU - Steuerer, J.
AU - Stoll, K.
AU - Strom, D.
AU - Ströhmer, R.
AU - Surrow, B.
AU - Talbot, S. D.
AU - Taras, P.
AU - Tarem, S.
AU - Teuscher, R.
AU - Thiergen, M.
AU - Thomas, J.
AU - Thomson, M. A.
AU - von Törne, E.
AU - Torrence, E.
AU - Towers, S.
AU - Trigger, I.
AU - Trócsányi, Z.
AU - Tsur, E.
AU - Turcot, A. S.
AU - Turner-Watson, M. F.
AU - Ueda, I.
AU - van Kooten, R.
AU - Vannerem, P.
AU - Verzocchi, M.
AU - Voss, H.
AU - Wäckerle, F.
AU - Wagner, A.
AU - Ward, C. P.
AU - Ward, D. R.
AU - Watkins, P. M.
AU - Watson, A. T.
AU - Watson, N. K.
AU - Wells, P. S.
AU - Wermes, N.
AU - White, J. S.
AU - Wilson, G. W.
AU - Wilson, J. A.
AU - Wyatt, T. R.
AU - Yamashita, S.
AU - Yekutieli, G.
AU - Zacek, V.
AU - Zer-Zion, D.
PY - 1999
Y1 - 1999
N2 - The 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-→qq̄′qq̄′ events with the non-leptonic component of W+W-→qq̄′ℓv̄ℓ events. The scaled momentum distribution, its mean value, 〈xp〉, and that of the charged particle multiplicity, 〈nch〉, are measured and found to be consistent in the two channels. The measured differences are: Δ〈nch〉 = 〈nch4q〉 - 2〈nchqqℓv〉 = +0.7 ± 0.6 Δ〈xp〉 = 〈xp4q〉 - 〈xpqqℓv〉 = (-0.09 ± 0.09 ± 0.05) × 10-2 In addition, measurements of rapidity and thrust are performed for W+W-→ qq̄′qq̄′ 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 MW is also quantified in the context of models studied.
AB - The 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-→qq̄′qq̄′ events with the non-leptonic component of W+W-→qq̄′ℓv̄ℓ events. The scaled momentum distribution, its mean value, 〈xp〉, and that of the charged particle multiplicity, 〈nch〉, are measured and found to be consistent in the two channels. The measured differences are: Δ〈nch〉 = 〈nch4q〉 - 2〈nchqqℓv〉 = +0.7 ± 0.6 Δ〈xp〉 = 〈xp4q〉 - 〈xpqqℓv〉 = (-0.09 ± 0.09 ± 0.05) × 10-2 In addition, measurements of rapidity and thrust are performed for W+W-→ qq̄′qq̄′ 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 MW is also quantified in the context of models studied.
UR - http://www.scopus.com/inward/record.url?scp=0040146369&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0040146369&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(99)00309-3
DO - 10.1016/S0370-2693(99)00309-3
M3 - Article
AN - SCOPUS:0040146369
SN - 0370-2693
VL - 453
SP - 153
EP - 168
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-2
ER -