Bose-Einstein correlations in W-pair decays with an event-mixing technique

Schael S; Barate R; Bruneliere R; De Bonis I; Decamp D; Goy C; Jezequel S; Lees JP; Martin F; Merle E; Minard MN; Pietrzyk B; Trocme B; Bravo S; Casado MP; Chmeissani A; Crespo JM; Fernandez E; Fernandez Bosman A; Garrido L; Martinez A; Pacheco A; Ruiz H; Colaleo A; Creanza D; De Filippis N; de Palma M; Iaselli G; Maggi G; Maggi M; Nuzzo S; Ranieri A; Raso G; Ruggieri F; Selvaggi G; Silvestris L; Tempesta P; Tricomi A; Zito G; Huang X; Lin J; Ouyang Q; Wang T; Xie Y; Xu R; Xue S; Zhang J; Zhang L; Zhao W; Abbaneo D; Barklow T; Buchmuller O; Cattaneo M; Clerbaux B; Drevermann H; Forty RW; Frank M; Gianotti F; Hansen JB; Harvey J; Hutchcroft DE; Janot P; Jost B; Kado M; Mato P; Moutoussi A; Ranjard F; Rolandi L; Schlatter D; Sguazzoni G; Teubert F; Valassi A; Videau I; Badaud F; Dessagne S; Falvard A; Fayolle D; Gay P; Jousset J; Michel B; Monteil S; Pallin D; Pascolo JM; Perret P; Hansen JD; Hansen JR; Hansen PH; Kraan AC; Nilsson BS; Kyriakis A; Markou C; Simopoulou E; Vayaki A; Zachariadou K; Blondel A; Brient JC; Machefert F; Rouge A; Videau H; Ciulli V; Focardi E; Parrini G; Antonelli A; Antonelli M; Bencivenni G; Bossi F; Capon G; Cerutti E; Chiarella V; Laurelli P; Mannocchi G; Murtas GP; Passalacqua L; Kennedy J; Lynch JG; Negus P; O'Shea V; Thompson AS; Wasserbaech S; Cavanaugh R; Dhamotharan S; Geweniger C; Hanke P; Hepp V; Kluge EE; Putzer A; Stenzel H; Tittel K; Wunsch M; Beuselinck R; Cameron W; Davies G; Dornan PJ; Girone M; Marinelli N; Nowell J; Rutherford SA; Sedgbeer JK; Thompson JC; White R; Ghete VM; Girtler P; Kneringer E; Kuhn D; Rudolph G; Bouhova Thacker E; Bowdery CK; Clarke DP; Ellis G; Finch AJ; Foster F; Hughes G; Jones RWL; Pearson MR; Robertson NA; Smizanska M; van der Aa O; Delaere C; Leibenguth G; Lemaitre V; Blumenschein U; Holldorfer F; Jakobs K; Kayser F; Kleinknecht K; Muller AS; Renk B; Sander HG; Schmeling S; Wachsmuth H; Zeitnitz C; Ziegler T; Bonissent A; Coyle P; Curtil C; Ealet A; Fouchez D; Payre P; Tilquin A; Ragusa F; David A; Dietl H; Ganis G; Huttmann K; Lutjens G; Manner W; Moser HG; Settles R; Villegas M; Wolf G; Boucrot J; Callot O; Davier M; Duflot L; Grivaz JF; Heusse P; Jacholkowska A; Serin L; Veillet JJ; Azzurri P; Bagliesi G; Boccali I; Foa L; Giammanco A; Giassi A; Ligabue F; MESSINEO, ALBERTO MARIA; Palla F; Sanguinetti G; Sciaba A; Spagnolo P; Tenchini R; Venturi A; Verdini PG; Awunor O; Blair GA; Cowan G; Garcia Bellido A; Green MG; Medcalf T; Misiejuk A; Strong JA; Teixeira Dias P; Clifft RW; Edgecock TR; Norton PR; Tomalin IR; Ward JJ; Bloch Devaux B; Boumediene D; Colas P; Fabbro B; Lancon E; Lemaire MC; Locci E; Perez P; Rander J; Tuchming B; Vallage B; Litke AM; Taylor G; Booth CN; Cartwright S; Combley F; Hodgson PN; Lehto M; Thompson LF; Bohrer A; Brandt S; Grupen C; Hess J; Ngac A; Prange G; Borean C; Giannini G; He H; Putz J; Rothberg J; Armstrong SR; Berkelman K; Cranmer K; Ferguson DPS; Gao Y; Gonzalez S; Hayes OJ; Hu H; Jin S; Kile J; McNamara PA; Nielsen J; Pan YB; von Wimmersperg Toeller JH; Wiedenmann W; Wu J; Wu SL; Wu X; Zobernig G; Dissertori G.

doi:10.1016/j.physletb.2004.12.018

Bose-Einstein correlations in W-pair decays are studied using data collected by the ALEPH detector at LEP at e(+)e(-) centre-of-mass energies from 183 to 209 GeV. The analysis is based on the comparison of WW --> q (q) over barq (q) over bar events to "mixed" events constructed with the hadronic part of WW --> q (q) over bar lv events. The data are in agreement with the hypothesis that Bose-Einstein correlations are present only for pions from the same W decay. The JETSET model with Bose-Einstein correlations between pions from different W bosons is disfavoured. (C) 2004 Elsevier B.V. All rights reserved.