Inclusive B Decays to Wrong Sign Charmed Mesons J Abdallah , P Abreu , W Adam , P Adzic , T Albrecht , T Alderweireld , R Alemany-Fernandez , T Allmendinger , PP Allport , U Amaldi , N Amapane , S Amato , E Anashkin , A Andreazza , S Andringa , N Anjos , P Antilogus , WD Apel , Y Arnoud , S Ask , B Asman , JE Augustin , A Augustinus , P Baillon , A Ballestrero , P Bambade , R Barbiery , D Bardin , G Barker , A Baroncelli , M Battaglia , M Baubillier , KH Becks , M Begalli , A Behrmann , E Ben-Haim , N Benekos , A Benvenuti , C Berat , M Berggren , L Berntzon , D Bertrand , M Besancon , N Besson , D Bloch , M Blom , M Bluj , M Bonesini , M Boonekamp , PSL Booth , G Borisov , O Botner , B Bouquet , TJV Bowcock , I Boyko , M Bracko , R Brenner , E Brodet , P Bruckman , JM Brunet , L Bugge , P Buschmann , M Calvi , T Camporesi , V Canale , F Carena , N Castro , F Cavallo , M Chapkin , P Charpentier , P Checchia , R Chierici , P Chliapnikov , J Chudoba , SU Chung , K Cieslik , P Collins , R Contri , G Cosme , F Cossutti , MJ Costa , B Crawley , D Crennell , J Cuevas , J D'Hondt , J Dalmau , T da Silva , W Da Silva , G Della Ricca , A De Angelis , W De Boer , C De Clercq , B De Lotto , N De Maria , A De Min , L de Paula , L Di Ciaccio , A Di Simone , K Doroba , J Drees , M Dris , G Eigen , T Ekelof , M Ellert , M Elsing , MCE Santo , G Fanourakis , D Fassouliotis , M Feindt , J Fernandez , A Ferrer , R Ferro , U Flagmeyer , H Foeth , E Fokitis , F Fulda-Quenzer , J Fuster , M Gandelman , C Garcia , P Gavillet , E Gazis , T Geralis , R Gokieli , B Golob , G Gomez-Ceballos , P Goncalves , E Graziani , G Grosdider , K Grzelak , J Guy , C Haag , A Hallgren , K Hamacher , K Hamilton , J Hansen , S Haug , R Hauler , V Hedberg , M Hennecke , H Herr , J Hoffman , SO Holmgren , PJ Holt , MA Houlden , K Hultqvist , JN Jackson , G Jarlskog , P Jarry , D Jeans , EK Johansson , PD Johansson , P Jonsson , C Joram , L Jungermann , F Kapusta , S Katsanevas , E Katsoufis , G Kernel , BP Kersevan , A Kiiskinen , BT King , NJ Kjaer , P Kluit , P Kokkinias , C Kourkoumelis , O Kouznetsov , Z Krumstein , M Kucharczyk , J Lamsa , G Leder , F Ledroit , L Leinonen , R Leitner , J Lemonne , V Lepeltier , T Lesiak , W Liebig , D Liko , A Lipniacka , JH Lopes , JM Lopez , D Loukas , P Lutz , L Lyons , J MacNaughton , A Malek , S Maltezos , E Mandl , J Marco , R Marco , B Marechal , M Margoni , JC Marin , C Mariotti , A Markou , C Martinez-Rivero , J Masik , N Mastroyiannopoulos , F Matorras , C Matteuzzi , F Mazzucato , M Mazzucato , RM Nulty , C Meroni , WT Meyer , E Migliore , W Mitaroff , U Mjoernmark , T Moa , M Moch , K Moenig , R Monge , J Montenegro , D Moraes , S Moreno , P Morettini , U Mueller , K Muenich , M Mulders , L Mundim , W Murray , B Muryn , G Myatt , T Myklebust , M Nassiakou , F Navarria , K Nawrocki , R Nicolaidou , M Nikolenko , A Oblakowska-Mucha , V Obraztsov , A Olshevski , A Onofre , R Orava , K Osterberg , A Ouraou , A Oyanguren , M Paganoni , S Paiano , JP Palacios , H Palka , TD Papadopoulou , L Pape , C Parkes , F Parodi , U Parzefall , A Passeri , O Passon , L Peralta , V Perepelitsa , A Perrotta , A Petrolini , J Piedra , L Pieri , R Pierre , M Pimenta , E Piotto , T Podobnik , V Poireau , ME Pol , G Polok , P Poropat , V Pozdniakov , N Pukhaeva , A Pullia , J Rames , L Ramler , A Read , P Rebecchi , J Rehn , D Reid , R Reinhardt , P Renton , R Richard , J Ridky , M Rivero , D Rodriguez , A Romero , P Ronchese , E Rosenberg , P Roudeau , T Rovelli , V Ruhlmann-Kleider , D Ryabtchikov , A Sadovsky , L Salmi , J Salt , A Savoy-Navarro , U Schwickerath , C Schwanda , A Segar , R Sekulin , M Siebel , A Sisakian , G Smadja , O Smirnova , A Sokolov , A Sopczak , R Sosnowski , T Spassov , M Stanitzki , A Stocchi , J Strauss , B Stugu , M Szczekowski , M Szeptycka , T Szumlak , T Tabarelli , AC Taffard , E Tegenfeldt , J Timmermans , L Tkatchev , M Tobin , S Todorovova , A Tomaradze , B Tome , A Tonazzo , P Tortosa , P Travnicek , D Treille , G Tristram , M Trochimczuk , C Troncon , ML Turluer , IA Tyapkin , P Tyapkin , S Tzamarias , V Uvarov , G Valenti , P Van Dam , J Van Eldik , A Van Lysebetten , N van Remortel , I Van Vulpen , G Vegni , F Veloso , W Venus , F Verbeure , P Verdier , V Verzi , D Vilanova , L Vitale , V Vrba , H Wahlen , AJ Washbrook , C Weiser , D Wicke , J Wickens , G Wilkinson , M Winter , M Witek , O Yushchenko , A Zalewska , P Zalewski , D Zavrtanik , NI Zimin , A Zintchenko , M Zupan Physics letters B（2003）
摘要
The production of wrong sign charmed mesons b --> (D) over bar X-(s), D-(s) = (D-0, D+, D-s), is studied using the data collected by the DELPHI experiment in the years 1994 and 1995.Charmed mesons in Z --> b (b) over bar events are exclusively reconstructed by searching for the decays D-0 --> K(-)pi(+), D+ --> K(-)pi(+)pi(+) and D-s(+) --> phipi(+) --> K(+)K(-)pi(+). The wrong sign contribution is extracted by using two discriminant variables: the charge of the b-quark at decay time, estimated from the charges of identified particles, and the momentum of the charmed meson in the rest frame of the b-hadron.The inclusive branching fractions of b-hadrons into wrong sign charm mesons are measured to be: B(b --> (D) over bar X-0) + B(b --> D-X) = (9.3 +/- 1.7(stat) +/- 1.3(syst) +/- 0.4(B))%, B(b --> Ds-X) = (10.1 +/- 1.0(stat) +/- 0.6(syst) +/- 2.8(B))% where the first error is statistical, the second and third errors are systematic. (C) 2003 Published by Elsevier Science B.V.
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