Measurement of theBhadron energy distribution inZ0decays

K Abe,A Chou,H Staengle,P C Rowson,F Suekane,N Oishi,R H Schindler,A W Weidemann,T Gillman,Y Iwasaki,J Yashima,R Cotton,C C Young,R Prepost,G B Word,R De Sangro,T H Burnett,R K Yamamoto,G Mancinelli,D Onoprienko,H O Cohn,G M Bilei,G Blaylock,M Daoudi,J E Brau,D Su,O Bardon,L Piemontese,A Hasan,V Cook,H Park,C Simopoulos,D W G S Leith,I Karliner,E L Hart,W J Wisniewski,H Yuta,V Lia,A Calcaterra,E Church,R Kajikawa,J Wyss,A P Waite,K Hasuko,R Verdier,A Szumilo,D Calloway,M Carpinelli,J A Jaros,H Kawahara,R W Zdarko,M Loreti,B N Ratcliff,E Torrence,T Maruyama,D O Caldwell,D Aston,M Piccolo,E Vella,R Frey,J P Fernandez,A Sugiyama,N B Sinev,H R Band,T Nagamine,G D Punkar,J L Harton,B I Einsenstein,T B Moore,C Baltay,T Schalk,A Lu,W W Ash,G L Bashindzhagyan,S Fahey,C Vannini,C Fan,M Langston,T W Reeves,M Kalelkar,R Messner,S Narita,U Nauenberg,S Willocq,R Dubois,T Akagi,M Woods,M Nussbaum,S S Hertzbach,O H Saxton,E Mazzucato,H L Lynch,J Schwiening,S Manly,A I Trandafir,R Elia,G Baranko,B Camanzi,N De Groot,D J Sherden,D Falciai,G Crawford,A C Benvenuti,W Busza,B Meadows ,F Taylor ,A K Mckemey,R Steiner,M B Barakat,D C Williams,J P Venuti,M Smy ,Ximeng Yang ,J Lauber ,H Neal,Y Ohnishi,D L Burke ,M X Liu,J S Whitaker,S Hedges ,J J Russell,K C Moffeit,N.m Krishna ,P L Reinertsen,P Jacques,T Pavel ,D R Muller ,D Jackson ,R A Johnson,Hiroaki Masuda ,P Mockett ,Henry W Kendall ,J Quigley,J T Shank,M Cavalli‐Sforza ,Y Hasegawa,N.j Allen ,Brett Bolen ,J R Johnson,R Ben‐David ,J R Bogart,I Peruzzi,S Suzuki,S.r Wagner ,M.e Huffer ,X Liu,C Y Prescott,M Dima,R J Plano,M.h Shaevitz ,S L White,P.n Burrows ,Robert S Wilson ,S Sen,B A Schumm,M J Fero,G Shapiro,A.o Bazarko ,D Bisello,R S B King ,Tohru Takahashi ,E Etzion,J A Coller,S Watts ,F J Wickens,J D Turk,S Yellin ,D G Coyne,T Bolton,A Castro,H J Kang,K Pitts ,J M Yamartino,J Va’vra ,E W Hughes,E Pieroni,S R Smith,L.s Rochester ,M G Strauss,R Cowan ,W Bugg ,P Dervan ,J Labs ,T W Markiewicz,T Usher,D Dong ,C H Park,A D’oliveira ,P G Verdini,J A Snyder,M Hildreth ,P Rensing ,T Barklow ,M King ,T R Junk ,R.s Panvini ,P.y.c Du ,G Mantovani,H Hwang,G R Bower,R Kroeger ,Chris Damerell ,J Reidy,P Stamer,R Castaldi,H Steiner,S Williams ,S González ,G Gladding,R Cassell,J Huber,J Ma,R Dell’orso ,M Breidenbach,K Shmakov ,A Lath,A Johnson ,L S Osborne,E R Weiss,Z Jiang ,D L Wagner,V.v Serbo ,K Baird ,M Swartz,R Kofler ,Y D Kim,G Zapalac,Jianfeng Zhou

doi:10.1103/physrevd.56.5310

Abstract

We have measured the B hadron energy distribution in Z0 decays using a sample of semi-leptonic B decays recorded in the SLD experiment at SLAC. The energy of each tagged B hadron was reconstructed using information from the lepton and a partially reconstructed charm-decay vertex. We compared the scaled energy distribution with several models of heavy quark fragmentation. The average scaled energy of primary B hadrons was found to be <x_E_B> = 0.716 +- 0.011 (stat.) +0.022 -0.021 (syst.).

Full Text