Measurements of B ->pi,eta,eta 'l nu(l) branching fractions and determination of vertical bar V-ub vertical bar with semileptonically tagged B mesons
Articolo
Data di Pubblicazione:
2008
Abstract:
We report measurements of branching fractions for the decays B -> Pl nu(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 B-0 and B+ mesons found in the recoil of a second B meson decaying as B -> D-(*())l nu(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))) x 10(-4); we find 3.2 sigma evidence of the decay B+ -> eta l(+)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)) < 0.47 x 10(-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 vertical bar V-ub vertical bar in ranging from 3.6 x 10(-3) to 4.1 x 10(-3).
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
B. Aubert;M. Bona;Y. Karyotakis;J. P. Lees;V. Poireau;E. Prencipe;X. Prudent;V. Tisserand;J. G. Tico;E. Grauges;L. Lopez;A. Palano;M. Pappagallo;G. Eigen;B. Stugu;L. Sun;G. S. Abrams;M. Battaglia;D. N. Brown;R. N. Cahn;R. G. Jacobsen;L. T. Kerth;Y. G. Kolomensky;G. Kukartsev;G. Lynch;I. L. Osipenkov;M. T. Ronan;K. Tackmann;T. Tanabe;C. M. Hawkes;N. Soni;A. T. Watson;H. Koch;T. Schroeder;D. Walker;D. J. Asgeirsson;T. Cuhadar-Donszelmann;B. G. Fulsom;C. Hearty;T. S. Mattison;J. A. McKenna;M. Barrett;A. Khan;L. Teodorescu;V. E. Blinov;A. D. Bukin;A. R. Buzykaev;V. P. Druzhinin;V. B. Golubev;A. P. Onuchin;S. I. Serednyakov;Y. I. Skovpen;E. P. Solodov;K. Y. Todyshev;M. Bondioli;S. Curry;I. Eschrich;D. Kirkby;A. J. Lankford;P. Lund;M. Mandelkern;E. C. Martin;D. P. Stoker;S. Abachi;C. Buchanan;J. W. Gary;F. Liu;O. Long;B. C. Shen;G. M. Vitug;Z. Yasin;L. Zhang;V. Sharma;C. Campagnari;T. M. Hong;D. Kovalskyi;M. A. Mazur;J. D. Richman;T. W. Beck;A. M. Eisner;C. J. Flacco;C. A. Heusch;J. Kroseberg;W. S. Lockman;T. Schalk;B. A. Schumm;A. Seiden;L. Wang;M. G. Wilson;L. O. Winstrom;C. H. Cheng;D. A. Doll;B. Echenard;F. Fang;D. G. Hitlin;I. Narsky;T. Piatenko;F. C. Porter;R. Andreassen;G. Mancinelli;B. T. Meadows;K. Mishra;M. D. Sokoloff;F. Blanc;P. C. Bloom;W. T. Ford;A. Gaz;J. F. Hirschauer;A. Kreisel;M. Nagel;U. Nauenberg;J. G. Smith;K. A. Ulmer;S. R. Wagner;R. Ayad;A. Soffer;W. H. Toki;R. J. Wilson;D. D. Altenburg;E. Feltresi;A. Hauke;H. Jasper;M. Karbach;J. Merkel;A. Petzold;B. Spaan;K. Wacker;M. J. Kobel;W. F. Mader;R. Nogowski;K. R. Schubert;R. Schwierz;J. E. Sundermann;A. Volk;D. Bernard;G. R. Bonneaud;E. Latour;C. Thiebaux;M. Verderi;P. J. Clark;W. Gradl;S. Playfer;E. Watson;M. Andreotti;D. Bettoni;C. Bozzi;R. Calabrese;A. Cecchi;G. Cibinetto;P. Franchini;E. Luppi;M. Negrini;A. Petrella;L. Piemontese;V. Santoro;R. Baldini-Ferroli;A. Calcaterra;R. d. Sangro;G. Finocchiaro;S. Pacetti;P. Patteri;I. M. Peruzzi;M. Piccolo;M. Rama;A. Zallo;A. Buzzo;R. Contri;M. L. Vetere;M. M. Macri;M. R. Monge;S. Passaggio;C. Patrignani;E. Robutti;A. Santroni;S. Tosi;K. S. Chaisanguanthum;M. Morii;R. S. Dubitzky;J. Marks;S. Schenk;U. Uwer;V. Klose;H. M. Lacker;G. D. Nardo;L. Lista;D. Monorchio;G. Onorato;C. Sciacca;D. J. Bard;P. D. Dauncey;J. A. Nash;W. P. Vazquez;M. Tibbetts;P. K. Behera;X. Chai;M. J. Charles;U. Mallik;J. Cochran;H. B. Crawley;L. Dong;W. T. Meyer;S. Prell;E. I. Rosenberg;A. E. Rubin;Y. Y. Gao;A. V. Gritsan;Z. J. Guo;C. K. Lae;A. G. Denig;M. Fritsch;G. Schott;N. Arnaud;J. Bequilleux;A. D'Orazio;M. Davier;J. F. da Costa;G. Grosdidier;A. Hocker;V. Lepeltier;F. L. Diberder;A. M. Lutz;S. Pruvot;P. Roudeau;M. H. Schune;J. Serrano;V. Sordini;A. Stocchi;G. Wormser;J. Lange;D. M. Wright;I. Bingham;J. P. Burke;C. A. Chavez;J. R. Fry;E. Gabathuler;R. Gamet;D. E. Hutchcroft;D. J. Payne;C. Touramanis;A. J. Bevan;K. A. George;F. D. Lodovico;R. Sacco;M. Sigamani;G. Cowan;H. U. Flaecher;D. A. Hopkins;S. Paramesvaran;F. Salvatore;A. C. Wren;D. N. Brown;C. L. Davis;K. E. Alwyn;N. R. Barlow;R. J. Barlow;Y. M. Chia;C. L. Edgar;G. D. Lafferty;T. J. West;J. I. Yi;J. Anderson;C. Chen;A. Jawahery;D. A. Roberts;G. Simi;J. M. Tuggle;C. Dallapiccola;S. S. Hertzbach;X. Li;E. Salvati;S. Saremi;R. Cowan;D. Dujmic;P. H. Fisher;K. Koeneke;G. Sciolla;M. Spitznagel;F. Taylor;R. K. Yamamoto;M. Zhao;S. E. Mclachlin;P. M. Patel;H. Robertson;A. Lazzaro;V. Lombardo;F. Palombo;J. M. Bauer;L. Cremaldi;V. Eschenburg;R. Godang;R. Kroeger;D. A. Sanders;D. J. Summers;H. W. Zhao;M. Simard;P. Taras;F. B. Viaud;H. Nicholson;M. A. Baak;G. Raven;H. L. Snoek;C. P. Jessop;K. J. Knoepfel;J. M. LoSecco;W. F. Wang;G. Benelli;L. A. Corwin;K. Honscheid;H. Kagan;R. Kass;J. P. Morris;A. M.
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