A direct measurement of |V cs| in hadronic W decays using a charm tag

R Barate,H Wachsmuth,J.G Lynch,P Tempesta,G Ellis,F Hölldorfer,R Xu,G Chazelle,R Alemany,Y Saadi,W Männer,G Mannocchi,J Rothberg,B.S Nilsson,G.A Blair,S Monteil,J Lefrançois,S Schmeling,B Fabbro,P Saeger,B Bloch-Devaux,M Aleppo,A Wäänänen,C Markou,S Dessagne,B Tuchming,U Becker,G Bologna,J Jousset,K Zachariadou,F Bossi,C Geweniger,G Giannini,P Coyle,G Lütjens,V Hepp,P Maley,A Valassi,T Medcalf,D Fouchez,M De Palma,B Rensch,G Rizzo,A Vayaki,Q Ouyang,S.R Armstrong,B Gobbo,A Trabelsi,S Dhamotharan,M Swynghedauw,H Przysiezniak,A Böhrer,S Jin,B Renk,F Teubert,G Rudolph,O.J Hayes,A Antonelli,K Hüttmann,A Blondel,G Parrini,R Beuselinck,H.-A Nürnberger,O Schneider,A Gregorio,B Pietrzyk,G Boix,P Colas,E Simopoulou,G Bencivenni,K Tittel,F Machefert,W Orejudos,F Gianotti,G Hughes,G Merino,G Calderini,O Callot,A Moutoussi,E Tournefier,J Kile,F Combley,B Vallage,H Videau,I Lehraus,M Chmeissani,F Badaud,L Passalacqua,A Ranieri,U Sieler,M Pepe-Altarelli,P Morawitz,S Schael,P Campana,H Drevermann,C Guicheney,I Videau,M Kröcker,H Seywerd,B Jost,J Boucrot,J.H Dann,P Girtler,H Ruiz,F Ruggieri,A Ealet,F Murtas,C Mannert,M.-N Minard,F Podlyski,J Nowell,F Ranjard,F Foster,C Georgiopoulos,C Ferdi,E Rohne,M Wunsch,M Davier,A Misiejuk,C Bozzi,T.C Greening,G Capon,S Xue,D Schlatter,C Loomis,R Settles,B Raeven,A Minten,K Affholderbach,A Pacheco,E Thomson,S Bravo,A Rougé,I Giehl,A Putzer,C Zeitnitz,G Sanguinetti,M Corden,W Cameron,E Merle,H Dietl,S Goodsir,W Tejessy,I Ferrante,G Prange,S Werner,B Michel,Jean-Claude Montret ,Y B Pan ,S.n Black ,P Henrard ,D Smith ,A Giassi ,R Cavanaugh ,G Mäggi ,V M Ghete ,S Nuzzo ,A Venturi ,G Zito ,J.m Crespo ,J Carr ,J Heß ,M Smižanská ,E Fernández ,C Raine ,K Jakobs ,P Pérez ,J B De Viviede Regie ,R Tanaka ,V Büscher ,P Perret ,M G Green ,A Juste Rozas ,E Focardi ,J B Hansen ,P Negus ,G Cowan ,M Maggi ,P Laurelli ,W Wiedenmann ,G Bagliesi ,J Rander ,J Lin ,C Grupen ,P Spagnolo ,P Hodgson ,K Kleinknecht ,E Lançon ,G Daskalakis ,M P Casado ,G Wolf ,J Guenther ,S Gilardoni ,D Botterill ,G Quast ,V O’shea ,J.j Aubert ,G Dissertori ,E Graugés ,S Wasserbaech ,Matthew Chalmers ,J Zhang ,Y S Gao ,J Nielsen ,A Rosowsky ,P Hanke ,D Zerwas ,P Elmer ,D Creanza ,F Ligabue ,P Janot ,J.c Thompson ,I Scott ,S Jézéquel ,H Stenzel ,I Riu ,T Wang ,O Buchmüller ,Y Xie ,N Marinelli ,T Boccali ,Ll Garrido ,E B Martin ,A Kyriakis ,T.r Edgecock ,M Cattaneo ,O Deschamps ,T Ziegler ,A Tilquin ,N Konstantinidis ,Alison Wright ,H Y Kim ,J.-F Grivaz ,D Pallin ,V Chiarella ,J R Hansen ,M Frank ,M Girone ,Р Тенчини ,A.w Halley ,A Falvard ,Siegmund Brandt ,E Locci ,X Wu ,D Kühn ,G Faı̈f ,I R Tomalin ,A Jachołkowska ,A Colaleo ,J Nash ,A Messineo ,A M Litke ,L Curtis ,M Fernández-Bosman ,P H Hansen ,G Iaselli ,D Décamp ,G Ganis ,P.g Buck ,J Pütz ,F Palla ,P Heusse ,A.‐S Müller ,V Ciulli ,G Raso ,Jane Coles ,M Martı́nez ,P Mató ,R.w Williams ,P.a Mcnamara ,R Dell’orso ,M Lehto ,F Cerutti ,R Miquel ,G Sguazzoni ,J Walsh ,E.-E Kluge ,L Zhang ,F Ragusa ,D.p.s Ferguson ,Z Ajaltouni ,M.i Williams ,S González ,A J Finch ,M Williams ,A Tricomi ,P G Verdini ,A Bonissent ,P Azzurri ,G Selvaggi ,L Serin ,M.a Mcneil ,P Teixeira-Dias ,C Goy ,L Duflot ,W Zhao ,S Chen ,D Abbaneo ,H Hu ,G Rolandi ,M Antonelli ,J Harvey ,A Sciabà ,R Forty ,O Leroy ,L Silvestris ,L.t Jones ,L.f Thompson ,M Kado ,M Schmitt ,E Kneringer ,X T Huang ,Philippe Ghez ,J F Renardy ,N A Robertson ,R W Clifft ,J K Sedgbeer ,J H Von Wimmersperg-Toeller ,M C Lemaire ,P S Marrocchesi ,C N Booth ,J C Brient ,H G Sander ,J P Lees ,S L Cartwright ,J A Strong ,A S Thompson ,D E Hutchcroft ,P J Dornan ,J D Hansen ,C K Bowdery ,Roger Jones ,L M Mir ,J J Veillet ,F F Martin ,P R Norton ,S L Wu ,G N Taylor ,D M Binnie ,J J Ward ,G Zobernig

doi:10.1016/s0370-2693(99)01088-6

A direct measurement of |V cs| in hadronic W decays using a charm tag

R Barate, H Wachsmuth + Show 339 more

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https://doi.org/10.1016/s0370-2693(99)01088-6

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#Inclusive Production Rate #Final State + Show 8 more

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Abstract

The inclusive charm production rate in W decays is measured from a study of the properties of final state particles. The sample of W pairs is selected from 67.7 pb −1 collected by ALEPH in 1996 and 1997 at centre-of-mass energies near 172 and 183 GeV in the channels W +W −→4q and W +W −→ℓνq q ̄ . The branching fraction of hadronic W decays to a final state containing a c quark, R W c= Γ(W→cX)/Γ(W→hadrons), is measured to be 0.51±0.05 stat±0.03 syst. This allows a direct determination of the CKM matrix element |V cs|=1.00±0.11 stat±0.07 syst.

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