Lepton asymmetry measurements inB¯→D*l−ν¯land implications forV-Aand the form factors

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ID: 273562
1993
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Abstract
We present a measurement of the lepton decay asymmetry Afb in the reaction B¯→D*l−ν¯l using data collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The value of Afb confirms that the chirality of the weak interaction is predominantly left-handed in b→c transitions as expected in the standard model, if it is assumed that the lepton current is also left-handed. Using Afb and the previously determined branching ratio, q2 distribution, and D* polarization, we obtain the first measurement of the form-factor ratios that are used to describe this semileptonic decay.
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Authors S. Sanghera,T. Skwarnicki,R. Stroynowski,Marina Artuso,M. Goldberg,N. Horwitz,R. Kennett,G. C. Moneti,F. Muheim,S. Playfer,Y. Rozen,P. Rubin,Sheldon Stone,M. Thulasidas,W.-M. Yao,G. Zhu,A. V. Barnes,J. Bartelt,S. E. Csorna,Z. Egyed,V. Jain,P. Sheldon,D. S. Akerib,B. Barish,M. Chadha,D. F. Cowen,G. Eigen,J. S. Miller,J. Urheim,A. J. Weinstein,D. Acosta,G. Masek,B. Ong,H. Paar,M. Sivertz,Alice Bean,J. Gronberg,Robert Kutschke,S. Menary,R. J. Morrison,H. Nelson,J. Richman,H. Tajima,D. Schmidt,D. Sperka,M. Witherell,M. Procario,M. Daoudi,W. T. Ford,D. R. Johnson,K. Lingel,M. Lohner,P. Rankin,J. G. Smith,J. P. Alexander,C. Bebek,K. Berkelman,D. Besson,T. E. Browder,D. G. Cassel,D. M. Coffman,P. S. Drell,R. Ehrlich,R. S. Galik,Maurice Garcia-Sciveres,B. Geiser,B. Gittelman,S. W. Gray,D. L. Hartill,B. K. Heltsley,K. Honscheid,C. Jones,J. Kandaswamy,N. Katayama,P. C. Kim,D. L. Kreinick,G. S. Ludwig,J. Masui,J. Mevissen,N. B. Mistry,C. R. Ng,E. Nordberg,C. O’Grady,J. R. Patterson,D. Peterson,D. Riley,M. Sapper,M. Selen,H. Worden,M. Worris,F. Würthwein,P. Avery,A. Freyberger,J. Rodriguez,R. Stephens,J. Yelton,D. Cinabro,S. Henderson,K. Kinoshita,T. Liu,M. Saulnier,R. Wilson,H. Yamamoto,A. J. Sadoff,R. Ammar,S. Ball,P. Baringer,D. Coppage,N. Copty,R. Davis,N. Hancock,M. Kelly,N. Kwak,H. Lam,Y. Kubota,M. Lattery,J. K. Nelson,S. Patton,D. Perticone,Ronald Poling,V. Savinov,S. Schrenk,R. Wang,M. S. Alam,I. J. Kim,B. Nemati,J. J. O’Neill,V. Romero,H. Severini,C. R. Sun,P.-N. Wang,M. M. Zoeller,G. Crawford,R. Fulton,K. K. Gan,H. Kagan,R. Kass,J. Lee,R. Malchow,F. Morrow,M. Sung,C. White,J. Whitmore,P. Wilson,F. Butler,X. Fu,G. Kalbfleisch,M. Lambrecht,P. Skubic,J. Snow,D. Bortoletto,D. N. Brown,J. Dominick,R. L. McIlwain,T. Miao,D. H. Miller,M. Modesitt,S. F. Schaffner,E. I. Shibata,I. P. J. Shipsey,M. Battle,J. Ernst,H. Kroha,S. Roberts,K. Sparks,E. H. Thorndike,C.-H. Wang;S. Sanghera;T. Skwarnicki;R. Stroynowski;Marina Artuso;M. Goldberg;N. Horwitz;R. Kennett;G. C. Moneti;F. Muheim;S. Playfer;Y. Rozen;P. Rubin;Sheldon Stone;M. Thulasidas;W.-M. Yao;G. Zhu;A. V. Barnes;J. Bartelt;S. E. Csorna;Z. Egyed;V. Jain;P. Sheldon;D. S. Akerib;B. Barish;M. Chadha;D. F. Cowen;G. Eigen;J. S. Miller;J. Urheim;A. J. Weinstein;D. Acosta;G. Masek;B. Ong;H. Paar;M. Sivertz;Alice Bean;J. Gronberg;Robert Kutschke;S. Menary;R. J. Morrison;H. Nelson;J. Richman;H. Tajima;D. Schmidt;D. Sperka;M. Witherell;M. Procario;M. Daoudi;W. T. Ford;D. R. Johnson;K. Lingel;M. Lohner;P. Rankin;J. G. Smith;J. P. Alexander;C. Bebek;K. Berkelman;D. Besson;T. E. Browder;D. G. Cassel;D. M. Coffman;P. S. Drell;R. Ehrlich;R. S. Galik;Maurice Garcia-Sciveres;B. Geiser;B. Gittelman;S. W. Gray;D. L. Hartill;B. K. Heltsley;K. Honscheid;C. Jones;J. Kandaswamy;N. Katayama;P. C. Kim;D. L. Kreinick;G. S. Ludwig;J. Masui;J. Mevissen;N. B. Mistry;C. R. Ng;E. Nordberg;C. O’Grady;J. R. Patterson;D. Peterson;D. Riley;M. Sapper;M. Selen;H. Worden;M. Worris;F. Würthwein;P. Avery;A. Freyberger;J. Rodriguez;R. Stephens;J. Yelton;D. Cinabro;S. Henderson;K. Kinoshita;T. Liu;M. Saulnier;R. Wilson;H. Yamamoto;A. J. Sadoff;R. Ammar;S. Ball;P. Baringer;D. Coppage;N. Copty;R. Davis;N. Hancock;M. Kelly;N. Kwak;H. Lam;Y. Kubota;M. Lattery;J. K. Nelson;S. Patton;D. Perticone;Ronald Poling;V. Savinov;S. Schrenk;R. Wang;M. S. Alam;I. J. Kim;B. Nemati;J. J. O’Neill;V. Romero;H. Severini;C. R. Sun;P.-N. Wang;M. M. Zoeller;G. Crawford;R. Fulton;K. K. Gan;H. Kagan;R. Kass;J. Lee;R. Malchow;F. Morrow;M. Sung;C. White;J. Whitmore;P. Wilson;F. Butler;X. Fu;G. Kalbfleisch;M. Lambrecht;P. Skubic;J. Snow;D. Bortoletto;D. N. Brown;J. Dominick;R. L. McIlwain;T. Miao;D. H. Miller;M. Modesitt;S. F. Schaffner;E. I. Shibata;I. P. J. Shipsey;M. Battle;J. Ernst;H. Kroha;S. Roberts;K. Sparks;E. H. Thorndike;C.-H. Wang;
Journal physical review d
Year 1993
DOI
10.1103/physrevd.47.791
URL
https://sciprofiles.com/publication/view/96800f23cb91a6cd92a219b7184176b3
Keywords
model chirality polarization asymmetry branching form factors weak lepton cornell

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