Measurement of the inclusive charmless and double-charm B branching ratios

P Abreu,W Kucewicz, K Nawrocki,B Jeanmarie, J Van Eldik,C Bosio,D Crennell,G Damgaard,N I Zimine,A Augustinus,E K Johansson, R Nicolaidou,Yu Belokopytov,S Heising, P Adzic,S Fichet,P Chochula,F Parodi,G Vegni,B Loerstad,Sergio Navas, A Ouraou,R Marco,S Ragazzi,Jan Timmermans,D Stampfer,W S C Williams,D Radojicic,N J Kjaer,N Neufeld, L Pape,G Smadja,G D Alekseev,J Dolbeau,Mingshui Chen,V Kostioukhine,P Roudeau, E Vlasov, G Valenti,G Grosdidier,W De Boer, S Amato, M Houlden,Jose Salt,P Herquet,G Rinaudo,A W Borgland,O Klapp,J Lemonne, O Rohne,G R Smith,D Bertini,P Chliapnikov,W Mitaroff,J Ridky,Z Krumshtein,A De Min, F Scuri,B De Lotto,H Saarikko,M J Bates,A Zalewska, V Hedberg,T B Skaali,R Barbier,M Canepa,I Bozovic,D Treille,Yu A Khokhlov, K H Becks,T Tabarelli,R Strub, S Stapnes,G Tristram,E N Gazis, C Petridou,E Zevgolatakos,O Yushchenko,A B Fenyuk, F Glege,M Mccubbin,J Guy,A G Olshevski,K A Drees,M Szczekowski,A S Vodopianov,J Cuevas Maestro,W Venus,Jungyu Yi,S De Brabandere,C Caso,D Fassouliotis,Ronald D G Mckay,O Smirnova,R Janik,N Redaelli,R Sekulin, S Nemecek,F J Harris,P Billoir,P Negri, D Gele,M Battaglia,X Moreau,G Ekspong,A N Sisakian,V Malychev,J P Laugier,M Elsing,M Witek,T L Hessing,Carlos A Reyes Garcia,A G Frodesen,A M Wetherell,A Leisos,J H Wickens,H T Phillips,M Pegoraro, W Adam, K Doroba, P Antilogus,E Graziani, A Romero,M Bonesini, L Di Ciaccio,F Verbeure,I Van Vulpen,T Lesiak, P Kluit,F Fuldaquenzer,O Kouznetsov, A Stocchi, J Heuser,F Hahn,E C Katsoufis,Klaus Monig,B A Khomenko,A Malek,E Higon,F Pierre,M Chapkin, M Margoni,S Haider,M S Bilenky, J Marco, P Vincent,G Sajot,B Tome,T Rovelli, P Paganini,M Caccia,L Jonsson,T Adye,W T Meyer,J Chudoba,Y Arnoud,M Michelotto,R Ehret,P Kubinec,O Solovianov,S O Holmgren, R Chierici, R Fruhwirth,M Koratzinos,B Bouquet,Y Sacquin,J C Marin,A L Read,R Silvestre,J R Mahon,C De La Vaissiere, C Bourdarios,P Buschmann, R Orava, H Pernegger,J Libby,M Mazzucato, N Demaria,L Peralta,G Piana, B Asman,T Camporesi, N Smirnov,A Duperrin,R Contri,N Pukhaeva,P J Holt,K Muenich,P Niss,S Hahn,B Ueberschaer,R Alemany,M Dracos,W Neumann,S Tzamarias,D Vilanova,A Passeri,V Lefebure,V Nikolaenko,G Transtromer,I Gonzalez Caballero,Hugh M Herr,G Cosme,Daniel Wicke,I Kronkvist,F Martinezvidal,R Gokieli,F Naraghi,G Leder,E Vallazza, R Brenner,T Brenke,P Rosinsky,J M Brunet,W D Apel,K Belous,C Berat,G Fanourakis,F Carena,C Mariotti,E Piotto,B Erzen,C Stanescu,F Ledroit,F Matorras,A Sopczak,G Polok,M Szeptycka,R Jacobsson,L Tortora,A Sheridan, C Joram,D Bloch,H Palka,T Myklebust,P Renton,V Ruhlmannkleider,D Yu Bardin,P Andersson, Piet Van Dam,A J Camacho Rozas,M Dris, P N Ratoff,P Seager, M Mulders, P Morettini, F Simonetto,V Lepeltier,C Martinezrivero,S Marti I Garcia,A Deghorain,Ph Charpentier,S Hoorelbeke,R Moller,Elisabeth Falk Harris,R Reinhardt,F Waldner,S Stanic,S Todorova,W Oberschultebeckmann,U Mjoernmark,A Nygren,M Regler,L Vitale,F Bianchi,A Di Diodato,P Poropat,H Dijkstra, A Tsirou,W Bonivento,J Fayot,N Vassilopoulos, V Canale,K Kurvinen,O Barring,C Matteuzzi,A M Segar,D W Lane,Maciej Gorski,J Macnaughton, P Bambade,Tord Ekelof,M Verlato,G Matthiae,P Zalewski,M Winter,G Eigen,V Pozdniakov,J H Cowell,R Henriques,C Troncon,A Van Lysebetten, P Checchia,P P Allport, A Baroncelli,Barry King,F Formenti,T Wlodek,M Davenport, T Burgsmuller,M Pernicka,A Grefrath,C Kreuter,G Myatt,P S L Booth, M Boonekamp,M A E Schyns,U Schwickerath,M A Bizouard,K Karafasoulis, A Cattai,W J Murray,T Buran,M C Espirito Santo,R Mcnulty,Josef Strauss,K Hamacher, G I Borisov,L Ventura,R C A Brown,M Bozzo,C Walck,B Dalmagne,M Begalli,Ch Jarlskog,O Botner,M Pimenta,R Leitner,C Kourkoumelis,V A Uvarov,A Tilquin,A De Angelis,L Carroll,M Nieuwenhuizen,P Rebecchi, J H Thomas,K Grzelak,E I Rosenberg,V Chorowicz, K Hultqvist, E Migliore,J P Gerber,R Pain,N N Khovanski,B Stugu,C Parkes,C Gaspar,P D Dauncey,M Gandelman,V Gracco,G Della Ricca, G A Chelkov,S Squarcia,I A Tyapkin, T Moa,H Schneider,D Z Toet,C Cerruti, T Todorov,A Normand,J N Jackson,P Juillot,M Berggren, C Meroni,A Nomerotski,B Franek,K Papageorgiou,D Gamba,V Chabaud,J Medbo,D Loukas,T Podobnik,F Fontanelli,P Jonsson,Th D Papadopoulou, K Korcyl,L Chaussard,L N Gerdyukov,G Lenzen,D Souzasantos,D J Holthuizen, P Ronchese, D Liko,G Orazi,L Lanceri,P Kokkinias, G Jarlskog,P Bruckman,T Spassov,U Flagmeyer,G Mcpherson,J D Durand,G C Zucchelli,J E Garcia,M Gaspar,Delyth M Reid,C Green,E Boudinov, A Perrotta, J H Lopes,K D Brand, U Gasparini,N Ghodbane,O Podobrin,F Mazzucato,A Markou, A Tomaradze,G J Barker,R C Shellard, M Besancon,H Rahmani, F Cossutti,D Edsall,F Mandl,P Gris,M Baubillier,A Petrolini, J Drees,N Neumeister,L Bugge, M Lethuillier,W Da Silva, S Czellar,M Bigi,F R Cavallo,P Branchini,V Obraztsov,B Golob,R Keranen, M Calvi,S Katsanevas, F Barao,A Onofre,J M Lopez,P Collins,C De Clercq,G W Van Apeldoorn,A Djannati, U Parzefall,O Ullaland,M Nikolenko,U Amaldi,J Fuster,F L Navarria,T G M Malmgren,I Stavitski,A Ruiz,I Lippi,Peter Fischer,G Wilkinson, L Mirabito,Manfred Krammer,J E Augustin,P Ferrari,V Verzi,D Zavrtanik,C Weiser,R Lauhakangas,A Sadovsky,P Privitera,R Paiva,P Langefeld,A Galloni,M Gunther,J Rames,C K Legan, L G Tkachev,S Cabrera,B S Nielsen,J P Engel,J G Loken,A Ferrer,Z Hajduk,E Fokitis,A Hallgren,L K Resvanis, M V Castillo Gimenez,F Kapusta, P Jarry, M Feindt,J J Hernandez,F Terranova,A Andreazza, D Sampsonidis,M L Turluer,A Tonazzo,A Lipniacka, L Lyons,L S Vertogradov,K Stevenson, V Vrba, D Bertrand,K Huet,F Richard,A M Zaitsev,C Lacasta, Hansjorg Klein,B Marechal,A Pullia, A Maio,M R Monge,L De Paula,P Sponholz, J Hrubec,S Paiano,S Almehed,Ph Gavillet,K Osterberg,D Knoblauch,Y Sedykh,Mattias Ellert, M Sannino,L Gorn,H Foeth,A Firestone,L Mundim,G Crosetti,A C Benvenuti,H B Crawley,T J V Bowcock,M Tyndel, G Zumerle,J W Lamsa, P Baillon,E Spiriti,M E Pol,M Colomer,M Paganoni,F Tegenfeldt,P Beilliere,B Muryn,J Grahl,P Delpierre,E Cortina,H Wahlen,A Trombini,P Lutz,R Sosnowski,G Wolf,G P Gopal,O G Chikilev,P Jalocha

PHYSICS LETTERS B（1998）

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摘要

The DELPHI experiment at LEP has measured the inclusive charmless B hadron decay branching ratio, the B branching ratio into two charmed particles, and the total number of charmed particles per B decay, using the hadronic Z data taken between 1992 and 1995. The results are extracted from a fit to the b-tagging probability distribution based on the precise impact parameter measurements made using the microvertex detector. The inclusive charmless B branching ratio, including B decays into hidden charm (c (c) over bar), is measured to be 0.033 +/- 0.021. The B branching ratio into two open charmed particles is 0.136 +/- 0.042. The mean number of charmed particles per B decay (including hidden charm) is 1.147 +/- 0.041. After subtracting the B decay branching ratio into hidden charm, the charmless B branching ratio is found to be 0.007 +/- 0.021, compatible with the Standard Model expectation. Models that predict an additional contribution to the charmless B branching ratio of 0.037 or higher are excluded with at least 95% confidence. (C) 1998 Elsevier Science B.V. All rights reserved.

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decay,physics

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