测量B→{π，η，η′}lnuₗ分支比并利用半轻子标记的B介子确定|Vₑb|
Measurements of B --> {pi,eta,eta;{'}}lnu_{l} branching fractions and determination of |V_{ub}| with semileptonically tagged B mesons.
作者信息
Aubert B, Bona M, Karyotakis Y, Lees J P, Poireau V, Prencipe E, Prudent X, Tisserand V, Garra Tico J, Grauges E, Lopez L, Palano A, Pappagallo M, Eigen G, Stugu B, Sun L, Abrams G S, Battaglia M, Brown D N, Cahn R N, Jacobsen R G, Kerth L T, Kolomensky Yu G, Kukartsev G, Lynch G, Osipenkov I L, Ronan M T, Tackmann K, Tanabe T, Hawkes C M, Soni N, Watson A T, Koch H, Schroeder T, Walker D, Asgeirsson D J, Cuhadar-Donszelmann T, Fulsom B G, Hearty C, Mattison T S, McKenna J A, Barrett M, Khan A, Teodorescu L, Blinov V E, Bukin A D, Buzykaev A R, Druzhinin V P, Golubev V B, Onuchin A P, Serednyakov S I, Skovpen Yu I, Solodov E P, Todyshev K Yu, Bondioli M, Curry S, Eschrich I, Kirkby D, Lankford A J, Lund P, Mandelkern M, Martin E C, Stoker D P, Abachi S, Buchanan C, Gary J W, Liu F, Long O, Shen B C, Vitug G M, Yasin Z, Zhang L, Sharma V, Campagnari C, Hong T M, Kovalskyi D, Mazur M A, Richman J D, Beck T W, Eisner A M, Flacco C J, Heusch C A, Kroseberg J, Lockman W S, Schalk T, Schumm B A, Seiden A, Wang L, Wilson M G, Winstrom L O, Cheng C H, Doll D A, Echenard B, Fang F, Hitlin D G, Narsky I, Piatenko T, Porter F C, Andreassen R, Mancinelli G, Meadows B T, Mishra K, Sokoloff M D, Blanc F, Bloom P C, Ford W T, Gaz A, Hirschauer J F, Kreisel A, Nagel M, Nauenberg U, Smith J G, Ulmer K A, Wagner S R, Ayad R, Soffer A, Toki W H, Wilson R J, Altenburg D D, Feltresi E, Hauke A, Jasper H, Karbach M, Merkel J, Petzold A, Spaan B, Wacker K, Kobel M J, Mader W F, Nogowski R, Schubert K R, Schwierz R, Sundermann J E, Volk A, Bernard D, Bonneaud G R, Latour E, Thiebaux Ch, Verderi M, Clark P J, Gradl W, Playfer S, Watson J E, Andreotti M, Bettoni D, Bozzi C, Calabrese R, Cecchi A, Cibinetto G, Franchini P, Luppi E, Negrini M, Petrella A, Piemontese L, Santoro V, Baldini-Ferroli R, Calcaterra A, de Sangro R, Finocchiaro G, Pacetti S, Patteri P, Peruzzi I M, Piccolo M, Rama M, Zallo A, Buzzo A, Contri R, Lo Vetere M, Macri M M, Monge M R, Passaggio S, Patrignani C, Robutti E, Santroni A, Tosi S, Chaisanguanthum K S, Morii M, Dubitzky R S, Marks J, Schenk S, Uwer U, Klose V, Lacker H M, De Nardo G, Lista L, Monorchio D, Onorato G, Sciacca C, Bard D J, Dauncey P D, Nash J A, Panduro Vazquez W, Tibbetts M, Behera P K, Chai X, Charles M J, Mallik U, Cochran J, Crawley H B, Dong L, Meyer W T, Prell S, Rosenberg E I, Rubin A E, Gao Y Y, Gritsan A V, Guo Z J, Lae C K, Denig A G, Fritsch M, Schott G, Arnaud N, Béquilleux J, D'Orazio A, Davier M, Firmino da Costa J, Grosdidier G, Höcker A, Lepeltier V, Le Diberder F, Lutz A M, Pruvot S, Roudeau P, Schune M H, Serrano J, Sordini V, Stocchi A, Wormser G, Lange D J, Wright D M, Bingham I, Burke J P, Chavez C A, Fry J R, Gabathuler E, Gamet R, Hutchcroft D E, Payne D J, Touramanis C, Bevan A J, George K A, Di Lodovico F, Sacco R, Sigamani M, Cowan G, Flaecher H U, Hopkins D A, Paramesvaran S, Salvatore F, Wren A C, Brown D N, Davis C L, Alwyn K E, Barlow N R, Barlow R J, Chia Y M, Edgar C L, Lafferty G D, West T J, Yi J I, Anderson J, Chen C, Jawahery A, Roberts D A, Simi G, Tuggle J M, Dallapiccola C, Hertzbach S S, Li X, Salvati E, Saremi S, Cowan R, Dujmic D, Fisher P H, Koeneke K, Sciolla G, Spitznagel M, Taylor F, Yamamoto R K, Zhao M, McLachlin S E, Patel P M, Robertson S H, Lazzaro A, Lombardo V, Palombo F, Bauer J M, Cremaldi L, Eschenburg V, Godang R, Kroeger R, Sanders D A, Summers D J, Zhao H W, Simard M, Taras P, Viaud F B, Nicholson H, Baak M A, Raven G, Snoek H L, Jessop C P, Knoepfel K J, Losecco J M, Wang W F, Benelli G, Corwin L A, Honscheid K, Kagan H, Kass R, Morris J P, Rahimi A M, Regensburger J J, Sekula S J, Wong Q K, Blount N L, Brau J, Frey R, Igonkina O, Kolb J A, Lu M, Rahmat R, Sinev N B, Strom D, Strube J, Torrence E, Castelli G, Gagliardi N, Margoni M, Morandin M, Posocco M, Rotondo M, Simonetto F, Stroili R, Voci C, Del Amo Sanchez P, Ben-Haim E, Briand H, Calderini G, Chauveau J, David P, Del Buono L, Hamon O, Leruste Ph, Ocariz J, Perez A, Prendki J, Gladney L, Biasini M, Covarelli R, Manoni E, Angelini C, Batignani G, Bettarini S, Carpinelli M, Cervelli A, Forti F, Giorgi M A, Lusiani A, Marchiori G, Morganti M, Neri N, Paoloni E, Rizzo G, Walsh J J, Biesiada J, Lopes Pegna D, Lu C, Olsen J, Smith A J S, Telnov A V, Anulli F, Baracchini E, Cavoto G, Del Re D, Di Marco E, Faccini R, Ferrarotto F, Ferroni F, Gaspero M, Jackson P D, Li Gioi L, Mazzoni M A, Morganti S, Piredda G, Polci F, Renga F, Voena C, Ebert M, Hartmann T, Schröder H, Waldi R, Adye T, Franek B, Olaiya E O, Roethel W, Wilson F F, Emery S, Escalier M, Esteve L, Gaidot A, Ganzhur S F, Hamel de Monchenault G, Kozanecki W, Vasseur G, Yèche Ch, Zito M, Chen X R, Liu H, Park W, Purohit M V, White R M, Wilson J R, Allen M T, Aston D, Bartoldus R, Bechtle P, Benitez J F, Cenci R, Coleman J P, Convery M R, Dingfelder J C, Dorfan J, Dubois-Felsmann G P, Dunwoodie W, Field R C, Gabareen A M, Gowdy S J, Graham M T, Grenier P, Hast C, Innes W R, Kaminski J, Kelsey M H, Kim H, Kim P, Kocian M L, Leith D W G S, Li S, Lindquist B, Luitz S, Luth V, Lynch H L, Macfarlane D B, Marsiske H, Messner R, Muller D R, Neal H, Nelson S, O'Grady C P, Ofte I, Perazzo A, Perl M, Ratcliff B N, Roodman A, Salnikov A A, Schindler R H, Schwiening J, Snyder A, Su D, Sullivan M K, Suzuki K, Swain S K, Thompson J M, Va'vra J, Wagner A P, Weaver M, West C A, Wisniewski W J, Wittgen M, Wright D H, Wulsin H W, Yarritu A K, Yi K, Young C C, Ziegler V, Burchat P R, Edwards A J, Majewski S A, Miyashita T S, Petersen B A, Wilden L, Ahmed S, Alam M S, Bula R, Ernst J A, Pan B, Saeed M A, Zain S B, Spanier S M, Wogsland B J, Eckmann R, Ritchie J L, Ruland A M, Schilling C J, Schwitters R F, Drummond B W, Izen J M, Lou X C, Bianchi F, Gamba D, Pelliccioni M, Bomben M, Bosisio L, Cartaro C, Della Ricca G, Lanceri L, Vitale L, Azzolini V, Lopez-March N, Martinez-Vidal F, Milanes D A, Oyanguren A, Albert J, Banerjee Sw, Bhuyan B, Choi H H F, Hamano K, Kowalewski R, Lewczuk M J, Nugent I M, Roney J M, Sobie R J, Gershon T J, Harrison P F, Ilic J, Latham T E, Mohanty G B, Band H R, Chen X, Dasu S, Flood K T, Pan Y, Pierini M, Prepost R, Vuosalo C O, Wu S L
机构信息
Laboratoire de Physique des Particules, IN2P3/CNRS et Université de Savoie, F-74941 Annecy-Le-Vieux, France.
出版信息
Phys Rev Lett. 2008 Aug 22;101(8):081801. doi: 10.1103/PhysRevLett.101.081801.
We report measurements of branching fractions for the decays B-->Plnu_{l}, where P are the pseudoscalar charmless mesons pi;{-}, pi;{0}, eta and eta;{'}, based on 348 fb;{-1} of data collected with the BABAR detector, using B0 and B+ mesons found in the recoil of a second B meson decaying as B-->D;{(*)}lnu_{l}. Assuming isospin symmetry, we combine pionic branching fractions to obtain B(B;{0}-->pi;{-}l;{+}nu_{l})=(1.54+/-0.17_{(stat)}+/-0.09_{(syst)})x10;{-4}; we find 3.2sigma evidence of the decay B;{+}-->etal;{+}nu_{l} and measure its branching fraction to be (0.64+/-0.20_{(stat)}+/-0.03_{(syst)})x10;{-4}, and determine B(B;{+}-->eta;{'}l;{+}nu_{l})<0.47x10;{-4} to 90% confidence level. Using partial branching fractions for the pionic decays in ranges of the momentum transfer and a variety of form factor calculation, we obtain values of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element |V_{ub}| in ranging from 3.6x10;{-3} to 4.1x10;{-3}.
我们报告了基于使用BABAR探测器收集的348 fb⁻¹数据，对衰变B→Plνₗ的分支比测量结果，其中P是赝标无粲介子π⁻、π⁰、η和η′，使用在第二个B介子衰变为B→D⁽*⁾νₗ的反冲中发现的B⁰和B⁺介子。假设同位旋对称性，我们合并了π介子的分支比以得到B(B⁰→π⁻l⁺νₗ) = (1.54±0.17₍统计₎±0.09₍系统₎)×10⁻⁴；我们发现有3.2σ的证据证明衰变B⁺→ηl⁺νₗ，并测量其分支比为(0.64±0.20₍统计₎±0.03₍系统₎)×10⁻⁴，并确定在90%置信水平下B(B⁺→η′l⁺νₗ) < 0.47×10⁻⁴。利用π介子衰变在动量转移范围内的部分分支比和各种形状因子计算，我们得到了卡比博 - 小林 - 益川矩阵元|Vub|大小的值，范围从3.6×10⁻³到4.1×10⁻³。
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