Aubert B, Barate R, Boutigny D, Couderc F, Karyotakis Y, Lees J P, Poireau V, Tisserand V, Zghiche A, Grauges-Pous E, Palano A, Pappagallo M, Pompili A, Chen J C, Qi N D, Rong G, Wang P, Zhu Y S, Eigen G, Ofte I, Stugu B, Abrams G S, Borgland A W, Breon A B, Brown D N, Button-Shafer J, Cahn R N, Charles E, Day C T, Gill M S, Gritsan A V, Groysman Y, Jacobsen R G, Kadel R W, Kadyk J, Kerth L T, Kolomensky Yu G, Kukartsev G, Lynch G, Mir L M, Oddone P J, Orimoto T J, Pripstein M, Roe N A, Ronan M T, Wenzel W A, Barrett M, Ford K E, Harrison T J, Hart A J, Hawkes C M, Morgan S E, Watson A T, Fritsch M, Goetzen K, Held T, Koch H, Lewandowski B, Pelizaeus M, Peters K, Schroeder T, Steinke M, Boyd J T, Burke J P, Chevalier N, Cottingham W N, Kelly M P, Cuhadar-Donszelmann T, Hearty C, Knecht N S, Mattison T S, McKenna J A, Thiessen D, Khan A, Kyberd P, Teodorescu L, Blinov A E, Blinov V E, Bukin A D, Druzhinin V P, Golubev V B, Ivanchenko V N, Kravchenko E A, Onuchin A P, Serednyakov S I, Skovpen Yu I, Solodov E P, Yushkov A N, Best D, Bondioli M, Bruinsma M, Chao M, Eschrich I, Kirkby D, Lankford A J, Mandelkern M, Mommsen R K, Roethel W, Stoker D P, Buchanan C, Hartfiel B L, Weinstein A J R, Foulkes S D, Gary J W, Long O, Shen B C, Wang K, Zhang L, Del Re D, Hadavand H K, Hill E J, MacFarlane D B, Paar H P, Rahatlou Sh, Sharma V, Berryhill J W, Campagnari C, Cunha A, Dahmes B, Hong T M, Lu A, Mazur M A, Richman J D, Verkerke W, Beck T W, Eisner A M, Flacco C J, Heusch C A, Kroseberg J, Lockman W S, Nesom G, Schalk T, Schumm B A, Seiden A, Spradlin P, Williams D C, Wilson M G, Albert J, Chen E, Dubois-Felsmann G P, Dvoretskii A, Hitlin D G, Narsky I, Piatenko T, Porter F C, Ryd A, Samuel A, Yang S, Jayatilleke S, Mancinelli G, Meadows B T, Sokoloff M D, Blanc F, Bloom P, Chen S, Ford W T, Nauenberg U, Olivas A, Rankin P, Ruddick W O, Smith J G, Ulmer K A, Zhang J, Chen A, Eckhart E A, Harton J L, Soffer A, Toki W H, Wilson R J, Zeng Q, Spaan B, Altenburg D, Brandt T, Brose J, Dickopp M, Feltresi E, Hauke A, Lacker H M, Maly E, Nogowski R, Otto S, Petzold A, Schott G, Schubert J, Schubert K R, Schwierz R, Sundermann J E, Bernard D, Bonneaud G R, Grenier P, Schrenk S, Thiebaux Ch, Vasileiadis G, Verderi M, Bard D J, Clark P J, Gradl W, Muheim F, Playfer S, Xie Y, Andreotti M, Azzolini V, Bettoni D, Bozzi C, Calabrese R, Cibinetto G, Luppi E, Negrini M, Piemontese L, Sarti A, Anulli F, Baldini-Ferroli R, Calcaterra A, de Sangro R, Finocchiaro G, Patteri P, Peruzzi I M, Piccolo M, Zallo A, Buzzo A, Capra R, Contri R, Lo Vetere M, Macri M, Monge M R, Passaggio S, Patrignani C, Robutti E, Santroni A, Tosi S, Bailey S, Brandenburg G, Chaisanguanthum K S, Morii M, Won E, Dubitzky R S, Langenegger U, Marks J, Uwer U, Bhimji W, Bowerman D A, Dauncey P D, Egede U, Gaillard J R, Morton G W, Nash J A, Nikolich M B, Taylor G P, Charles M J, Grenier G J, Mallik U, Cochran J, Crawley H B, Meyer W T, Prell S, Rosenberg E I, Rubin A E, Yi J, Arnaud N, Davier M, Giroux X, Grosdidier G, Höcker A, Le Diberder F, Lepeltier V, Lutz A M, Petersen T C, Pierini M, Plaszczynski S, Rodier S, Roudeau P, Schune M H, Stocchi A, Wormser G, Cheng C H, Lange D J, Simani M C, Wright D M, Bevan A J, Chavez C A, Coleman J P, Forster I J, Fry J R, Gabathuler E, Gamet R, George K A, Hutchcroft D E, Parry R J, Payne D J, Touramanis C, Cormack C M, Di Lodovico F, Brown C L, Cowan G, Flack R L, Flaecher H U, Green M G, Jackson P S, McMahon T R, Ricciardi S, Salvatore F, Winter M A, Brown D, Davis C L, Allison J, Barlow N R, Barlow R J, Hodgkinson M C, Lafferty G D, Naisbit M T, Williams J C, Chen C, Farbin A, Hulsbergen W D, Jawahery A, Kovalskyi D, Lae C K, Lillard V, Roberts D A, Blaylock G, Dallapiccola C, Hertzbach S S, Kofler R, Koptchev V B, Moore T B, Saremi S, Staengle H, Willocq S, Cowan R, Koeneke K, Sciolla G, Sekula S J, Taylor F, Yamamoto R K, Patel P M, Robertson S H, Lazzaro A, Lombardo V, Palombo F, Bauer J M, Cremaldi L, Eschenburg V, Godang R, Kroeger R, Reidy J, Sanders D A, Summers D J, Zhao H W, Brunet S, Côté D, Taras P, Nicholson H, Cavallo N, De Nardo G, Fabozzi F, Gatto C, Lista L, Monorchio D, Paolucci P, Piccolo D, Sciacca C, Baak M, Bulten H, Raven G, Snoek H L, Wilden L, Jessop C P, Losecco J M, Allmendinger T, Benelli G, Gan K K, Honscheid K, Hufnagel D, Kagan H, Kass R, Pulliam T, Rahimi A M, Ter-Antonyan R, Wong Q K, Brau J, Frey R, Igonkina O, Lu M, Potter C T, Sinev N B, Strom D, Torrence E, Colecchia F, Dorigo A, Galeazzi F, Margoni M, Morandin M, Posocco M, Rotondo M, Simonetto F, Stroili R, Voci C, Benayoun M, Briand H, Chauveau J, David P, Del Buono L, de la Vaissière Ch, Hamon O, John M J J, Leruste Ph, Malclès J, Ocariz J, Roos L, Therin G, Behera P K, Gladney L, Guo Q H, Panetta J, Biasini M, Covarelli R, Pioppi M, Angelini C, Batignani G, Bettarini S, Bucci F, Calderini G, Carpinelli M, Forti F, Giorgi M A, Lusiani A, Marchiori G, Morganti M, Neri N, Paoloni E, Rama M, Rizzo G, Simi G, Walsh J, Haire M, Judd D, Paick K, Wagoner D E, Danielson N, Elmer P, Lau Y P, Lu C, Olsen J, Smith A J S, Telnov A V, Bellini F, Cavoto G, D'Orazio A, Di Marco E, Faccini R, Ferrarotto F, Ferroni F, Gaspero M, Li Gioi L, Mazzoni M A, Morganti S, Piredda G, Polci F, Tehrani F Safai, Voena C, Christ S, Schröder H, Wagner G, Waldi R, Adye T, De Groot N, Franek B, Gopal G P, Olaiya E O, Wilson F F, Aleksan R, Emery S, Gaidot A, Ganzhur S F, Giraud P-F, Graziani G, de Monchenault G Hamel, Kozanecki W, Legendre M, London G W, Mayer B, Vasseur G, Yèche Ch, Zito M, Purohit M V, Weidemann A W, Wilson J R, Yumiceva F X, Abe T, Allen M, Aston D, Bartoldus R, Berger N, Boyarski A M, Buchmueller O L, Claus R, Convery M R, Cristinziani M, Dingfelder J C, Dong D, Dorfan J, Dujmic D, Dunwoodie W, Fan S, Field R C, Glanzman T, Gowdy S J, Hadig T, Halyo V, Hast C, Hryn'ova T, Innes W R, Kelsey M H, Kim P, Kocian M L, Leith D W G S, Libby J, Luitz S, Luth V, Lynch H L, Marsiske H, Messner R, Mohapatra A K, Muller D R, O'Grady C P, Ozcan V E, Perazzo A, Perl M, Ratcliff B N, Roodman A, Salnikov A A, Schindler R H, Schwiening J, Snyder A, Soha A, Stelzer J, Strube J, Su D, Sullivan M K, Thompson J, Va'vra J, Wagner S R, Weaver M, Wisniewski W J, Wittgen M, Wright D H, Yarritu A K, Young C C, Burchat P R, Edwards A J, Majewski S A, Petersen B A, Roat C, Ahmed M, Ahmed S, Alam M S, Ernst J A, Saeed M A, Saleem M, Wappler F R, Bugg W, Krishnamurthy M, Spanier S M, Eckmann R, Kim H, Ritchie J L, Satpathy A, Schwitters R F, Izen J M, Kitayama I, Lou X C, Ye S, Bianchi F, Bona M, Gallo F, Gamba D, Bomben M, Bosisio L, Cartaro C, Cossutti F, Ricca G Della, Dittongo S, Grancagnolo S, Lanceri L, Poropat P, Vitale L, Vuagnin G, Martinez-Vidal F, Panvini R S, Banerjee Sw, Bhuyan B, Brown C M, Fortin D, Hamano K, Jackson P D, Kowalewski R, Roney J M, Sobie R J, Back J J, Harrison P F, Latham T E, Mohanty G B, Band H R, Chen X, Cheng B, Dasu S, Datta M, Eichenbaum A M, Flood K T, Graham M, Hollar J J, Johnson J R, Kutter P E, Li H, Liu R, Mellado B, Mihalyi A, Pan Y, Prepost R, Tan P, von Wimmersperg-Toeller J H, Wu J, Wu S L, Yu Z, Greene M G, Neal H
Laboratoire de Physique des Particules, Annecy-le-Vieux, France.
Phys Rev Lett. 2005 Jul 22;95(4):042001. doi: 10.1103/PhysRevLett.95.042001. Epub 2005 Jul 20.
We report the first measurement of the branching fraction f(00) for Gamma(4S) --> B(0)B(0). The data sample consists of 81.7 fb(-1) collected at the Gamma(4S) resonance with the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)e(-) storage ring. Using partial reconstruction of the decay B(0) --> D(+) l(-)nu(l) in which only the charged lepton and the soft pion from the decay D(+) --> D(0)pi(+) are reconstructed, we obtain f(00) = 0.487 +/- 0.010(stat) +/- 0.008(syst). Our result does not depend on the branching fractions of B(0) --> D(+)l(-)nu(l) and D(+) --> D(0)pi(+) decays, on the ratio of the charged and neutral B meson lifetimes, nor on the assumption of isospin symmetry.
我们报告了对Γ(4S)→B⁰B⁰分支比f(00)的首次测量。数据样本由在SLAC PEP-II非对称能量e⁺e⁻储存环上使用BABAR探测器在Γ(4S)共振处收集的81.7 fb⁻¹组成。通过对衰变B⁰→D⁺l⁻ν(l)进行部分重建，其中仅重建带电轻子和来自衰变D⁺→D⁰π⁺的软π介子，我们得到f(00)=0.487±0.010(统计)±0.008(系统)。我们的结果不依赖于B⁰→D⁺l⁻ν(l)和D⁺→D⁰π⁺衰变的分支比、带电和中性B介子寿命的比值，也不依赖于同位旋对称性假设。
