B→Xulν部分分支比的测量及|Vub|的确定
Measurements of partial branching fractions for B-->Xulnu and determination of |Vub|.
作者信息
Aubert B, Bona M, Boutigny D, Karyotakis Y, Lees J P, Poireau V, Prudent X, Tisserand V, Zghiche A, 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, Button-Shafer J, Cahn R N, Groysman Y, Jacobsen R G, Kadyk J A, Kerth L T, Kolomensky Yu G, Kukartsev G, Lopes Pegna D, Lynch G, Mir L M, Orimoto T J, Osipenkov I L, Ronan M T, Tackmann K, Tanabe T, Wenzel W A, Del Amo Sanchez P, Hawkes C M, 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, Saleem M, Teodorescu L, Blinov V E, Bukin A D, 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, Foulkes S D, Gary J W, Liu F, Long O, Shen B C, Vitug G M, Zhang L, Paar H P, Rahatlou S, Sharma V, Berryhill J W, Campagnari C, Cunha A, Dahmes B, Hong T M, Kovalskyi D, 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, Wilson M G, Winstrom L O, Chen E, Cheng C H, 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, Chen S, Ford W T, Hirschauer J F, Kreisel A, Nagel M, Nauenberg U, Olivas A, Smith J G, Ulmer K A, Wagner S R, Zhang J, Gabareen A M, Soffer A, Toki W H, Wilson R J, Winklmeier F, Altenburg D D, Feltresi E, Hauke A, Jasper H, Merkel J, Petzold A, Spaan B, Wacker K, Klose V, Kobel M J, Lacker H M, Mader W F, Nogowski R, Schubert J, Schubert K R, Schwierz R, Sundermann J E, Volk A, Bernard D, Bonneaud G R, Latour E, Lombardo V, Thiebaux Ch, Verderi M, Clark P J, Gradl W, Muheim F, Playfer S, Robertson A I, Watson J E, Xie Y, Andreotti M, Bettoni D, Bozzi C, Calabrese R, Cecchi A, Cibinetto G, Franchini P, Luppi E, Negrini M, Petrella A, Piemontese L, Prencipe E, Santoro V, Anulli F, 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, Wu J, Dubitzky R S, Marks J, Schenk S, Uwer U, Bard D J, Dauncey P D, Flack R L, Nash J A, Vazquez W Panduro, Tibbetts M, Behera P K, Chai X, Charles M J, Mallik U, Cochran J, Crawley H B, Dong L, Eyges V, 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, Grosdidier G, Höcker A, Lepeltier V, Le Diberder F, Lutz A M, Pruvot S, Rodier S, Roudeau P, Schune M H, Serrano J, Sordini V, Stocchi A, Wang W F, 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, Schofield K C, Touramanis C, Bevan A J, Clarke C, George K A, Di Lodovico F, Menges W, Sacco R, Cowan G, Flaecher H U, Hopkins D A, Paramesvaran S, Salvatore F, Wren A C, Brown D N, Davis C L, Allison J, Bailey D, 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, Blaylock G, Dallapiccola C, Hertzbach S S, Li X, Moore T B, Salvati E, Saremi S, Cowan R, Dujmic D, Fisher P H, Koeneke K, Sciolla G, Spitznagel M, Taylor F, Yamamoto R K, Zhao M, Zheng Y, McLachlin S E, Patel P M, Robertson S H, Lazzaro A, Palombo F, Bauer J M, Cremaldi L, Eschenburg V, Godang R, Kroeger R, Sanders D A, Summers D J, Zhao H W, Brunet S, Côté D, Simard M, Taras P, Viaud F B, Nicholson H, De Nardo G, Fabozzi F, Lista L, Monorchio D, Sciacca C, Baak M A, Raven G, Snoek H L, Jessop C P, Knoepfel K J, Losecco J M, 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, Gagliardi N, Gaz A, Margoni M, Morandin M, Pompili A, Posocco M, Rotondo M, Simonetto F, Stroili R, Voci C, Ben-Haim E, Briand H, Calderini G, Chauveau J, David P, Del Buono L, de la Vaissière Ch, Hamon O, Leruste Ph, Malclès J, Ocariz J, Perez A, Prendki J, Gladney L, Biasini M, Covarelli R, Manoni E, Angelini C, Batignani G, Bettarini S, Carpinelli M, Cenci R, Cervelli A, Forti F, Giorgi M A, Lusiani A, Marchiori G, Mazur M A, Morganti M, Neri N, Paoloni E, Rizzo G, Walsh J J, Biesiada J, Elmer P, Lau Y P, Lu C, Olsen J, Smith A J S, Telnov A V, Baracchini E, Bellini F, 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, Castelli G, Franek B, Olaiya E O, Roethel W, Wilson F F, Emery S, Escalier M, 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, Claus R, Coleman J P, Convery M R, Dingfelder J C, Dorfan J, Dubois-Felsmann G P, Dunwoodie W, Field R C, Glanzman T, 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, Luitz S, Luth V, Lynch H L, Macfarlane D B, Marsiske H, Messner R, Muller D R, O'Grady C P, Ofte I, Perazzo A, Perl M, Pulliam T, 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, Wisniewski W J, Wittgen M, Wright D H, 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, Jain V, Pan B, Saeed M A, Wappler F R, Zain S B, Krishnamurthy M, Spanier S M, Eckmann R, Ritchie J L, Ruland A M, Schilling C J, Schwitters R F, Izen J M, Lou X C, Ye S, Bianchi F, Gallo F, Gamba D, Pelliccioni M, Bomben M, Bosisio L, Cartaro C, Cossutti F, 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, Hamano K, Kowalewski R, Nugent I M, Roney J M, Sobie R J, Harrison P F, Ilic J, Latham T E, Mohanty G B, Band H R, Chen X, Dasu S, Flood K T, Hollar J J, Kutter P E, Pan Y, Pierini M, Prepost R, Wu S L, Neal H
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 May 2;100(17):171802. doi: 10.1103/PhysRevLett.100.171802. Epub 2008 Apr 29.
We present partial branching fractions for inclusive charmless semileptonic B decays B[over ]-->X_{u}lnu[over ], and the determination of the Cabibbo-Kobayashi-Maskawa matrix element |V_{ub}|. The analysis is based on a sample of 383 x 10;{6} Upsilon(4S) decays into BB[over ] pairs collected with the BABAR detector at the SLAC PEP-II e;{+}e;{-} storage rings. We select events using the invariant mass M_{X} of the hadronic system, the invariant mass squared, q;{2}, of the lepton and neutrino pair, the kinematic variable P+, or one of their combinations. We then determine partial branching fractions in limited regions of phase space: DeltaB=(1.18+/-0.09_{stat}+/-0.07_{syst}+/-0.01_{theor})x10;{-3} (M_{X}<1.55 GeV/c;{2}), DeltaB=(0.95+/-0.10_{stat}+/-0.08_{syst}+/-0.01_{theor})x10;{-3} (P+<0.66 GeV/c), and DeltaB=(0.81+/-0.08_{stat}+/-0.07_{syst}+/-0.02_{theor})x10;{-3} (M_{X}<1.7 GeV/c;{2}, q;{2}>8 GeV;{2}/c;{4}). Corresponding values of |V_{ub}| are extracted using several theoretical calculations.
我们给出了包含无粲半轻子(B)衰变(\overline{B}\to X_{u}\ell\nu)的部分分支比，以及卡比博 - 小林 - 益川矩阵元(|V_{ub}|)的测定结果。该分析基于在SLAC的PEP - II正负电子对撞机上，利用BABAR探测器收集的(383\times10^{6})个(\Upsilon(4S))衰变到(B\overline{B})对的样本。我们通过强子系统的不变质量(M_{X})、轻子和中微子对的不变质量平方(q^{2})、运动学变量(P^{+})或它们的组合之一来选择事例。然后我们在相空间的有限区域确定部分分支比：(\Delta B=(1.18\pm0.09_{统计}\pm0.07_{系统}\pm0.01_{理论})\times10^{-3}(M_{X}<1.55\ GeV/c^{2}))，(\Delta B=(0.95\pm0.10_{统计}\pm0.08_{系统}\pm0.01_{理论})\times10^{-3}(P^{+}<0.66\ GeV/c))，以及(\Delta B=(0.81\pm0.08_{统计}\pm0.07_{系统}\pm0.02_{理论})\times10^{-3}(M_{X}<1.7\ GeV/c^{2},q^{2}>8\ GeV^{2}/c^{4}))。使用几种理论计算提取了(|V_{ub}|)的相应值。
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