Starting from a sample of four million hadronic Z decays collected with the ALEPH detector at LEP, 404 charged and neutral B mesons are fully reconstructed and used to look for resonant structure in the Bπ system. An excess of events is observed above the expected background in the Bπ mass spectrum at a mass ≈5.7 GeV/c2, consistent with the production and decay to B(∗)π of the B∗∗ states predicted by Heavy Quark Symmetry (HQS). In the framework of HQS, it is found that the mass of the state is MeV/c2 and the relative production rate of the B∗∗ system is . In the same sample of B mesons, significant Bπ± charge-flavour correlations are observed, which may prove important for tagging the initial B state in future CP violation studies.
Resonant structure and flavour tagging in the Bπ± system using fully reconstructed B decays / R. Barate;D. Buskulic;D. Decamp;P. Ghez;C. Goy;J.-P. Lees;A. Lucotte;E. Merle;M.-N. Minard;J.-Y. Nief;B. Pietrzyk;R. Alemany;G. Boix;M.P. Casado;M. Chmeissani;J.M. Crespo;M. Delfino;E. Fernandez;M. Fernandez-Bosman;Ll. Garrido;E. Graugès;A. Juste;M. Martinez;G. Merino;R. Miquel;Ll.M. Mir;I.C. Park;A. Pascual;J.A. Perlas;I. Riu;F. Sanchez;A. Colaleo;D. Creanza;M. de Palma;G. Gelao;G. Iaselli;G. Maggi;M. Maggi;S. Nuzzo;A. Ranieri;G. Raso;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;A. Tricomi;G. Zito;X. Huang;J. Lin;Q. Ouyang;T. Wang;Y. Xie;R. Xu;S. Xue;J. Zhang;L. Zhang;W. Zhao;D. Abbaneo;U. Becker;P. Bright-Thomas;D. Casper;M. Cattaneo;V. Ciulli;G. Dissertori;H. Drevermann;R.W. Forty;M. Frank;R. Hagelberg;J.B. Hansen;J. Harvey;R. Jacobsen;P. Janot;B. Jost;I. Lehraus;P. Mato;A. Minten;L. Moneta;A. Pacheco;J.-F. Pusztaszeri;F. Ranjard;L. Rolandi;D. Rousseau;D. Schlatter;M. Schmitt;O. Schneider;W. Tejessy;F. Teubert;I.R. Tomalin;H. Wachsmuth;A. Wagner;Z. Ajaltouni;F. Badaud;G. Chazelle;O. Deschamps;A. Falvard;C. Ferdi;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;S. Monteil;J-C. Montret;D. Pallin;P. Perret;F. Podlyski;J. Proriol;P. Rosnet;J.D. Hansen;J.R. Hansen;P.H. Hansen;B.S. Nilsson;B. Rensch;A. Wäänänen;G. Daskalakis;A. Kyriakis;C. Markou;E. Simopoulou;I. Siotis;A. Vayaki;A. Blondel;G. Bonneaud;J.-C. Brient;P. Bourdon;A. Rougé;M. Rumpf;A. Valassi;M. Verderi;H. Videau;E. Focardi;G. Parrini;K. Zachariadou;M. Corden;C. Georgiopoulos;D.E. Jaffe;A. Antonelli;G. Bencivenni;G. Bologna;F. Bossi;P. Campana;G. Capon;F. Cerutti;V. Chiarella;G. Felici;P. Laurelli;G. Mannocchi;F. Murtas;G.P. Murtas;L. Passalacqua;M. Pepe-Altarelli;L. Curtis;A.W. Halley;J.G. Lynch;P. Negus;V. O'Shea;C. Raine;J.M. Scarr;K. Smith;P. Teixeira-Dias;A.S. Thompson;E. Thomson;O. Buchmüller;S. Dhamotharan;C. Geweniger;G. Graefe;P. Hanke;G. Hansper;V. Hepp;E.E. Kluge;A. Putzer;J. Sommer;K. Tittel;S. Werner;M. Wunsch;R. Beuselinck;D.M. Binnie;W. Cameron;P.J. Dornan;M. Girone;S. Goodsir;E.B. Martin;N. Marinelli;A. Moutoussi;J. Nash;J.K. Sedgbeer;P. Spagnolo;M.D. Williams;V.M. Ghete;P. Girtler;E. Kneringer;D. Kuhn;G. Rudolph;A.P. Betteridge;C.K. Bowdery;P.G. Buck;P. Colrain;G. Crawford;A.J. Finch;F. Foster;G. Hughes;R.W.L. Jones;M.I. Williams;I. Giehl;A.M. Greene;C. Hoffmann;K. Jakobs;K. Kleinknecht;G. Quast;B. Renk;E. Rohne;H.-G. Sander;P. van Gemmeren;C. Zeitnitz;J.J. Aubert;C. Benchouk;A. Bonissent;G. Bujosa;D. Calvet;J. Carr;P. Coyle;F. Etienne;O. Leroy;F. Motsch;P. Payre;M. Talby;A. Sadouki;M. Thulasidas;K. Trabelsi;M. Aleppo;M. Antonelli;F. Ragusa;R. Berlich;W. Blum;V. Büscher;H. Dietl;G. Ganis;H. Kroha;G. Lütjens;C. Mannert;W. Männer;H.-G. Moser;S. Schael;R. Settles;H. Seywerd;H. Stenzel;W. Wiedenmann;G. Wolf;J. Boucrot;O. Callot;S. Chen;A. Cordier;M. Davier;L. Duflot;J.-F. Grivaz;Ph. Heusse;A. Höcker;A. Jacholkowska;D.W. Kim;F. Le Diberder;J. Lefrançois;A.-M. Lutz;M.-H. Schune;E. Tournefier;J.-J. Veillet;I. Videau;D. Zerwas;P. Azzurri;G. Bagliesi;G. Batignani;S. Bettarini;T. Boccali;C. Bozzi;G. Calderini;M. Carpinelli;M.A. Ciocci;R. Dell'Orso;R. Fantechi;I. Ferrante;L. Foà;F. Forti;A. Giassi;M.A. Giorgi;A. Gregorio;F. Ligabue;A. Lusiani;P.S. Marrocchesi;A. Messineo;F. Palla;G. Rizzo;G. Sanguinetti;A. Sciabà;R. Tenchini;G. Tonelli;C. Vannini;A. Venturi;P.G. Verdini;G.A. Blair;L.M. Bryant;J.T. Chambers;M.G. Green;T. Medcalf;P. Perrodo;J.A. Strong;J.H. von Wimmersperg-Toeller;D.R. Botterill;R.W. Clifft;T.R. Edgecock;S. Haywood;P.R. Norton;J.C. Thompson;A.E. Wright;B. Bloch-Devaux;P. Colas;S. Emery;W. Kozanecki;E. Lançon;M.-C. Lemaire;E. Locci;P. Perez;J. Rander;J.-F. Renardy;A. Roussarie;J.-P. Schuller;J. Schwindling;A. Trabelsi;B. Vallage;S.N. Black;J.H. Dann;R.P. Johnson;H.Y. Kim;N. Konstantinidis;A.M. Litke;M.A. McNeil;G. Taylor;C.N. Booth;C.A.J. Brew;S. Cartwright;F. Combley;M.S. Kelly;M. Lehto;J. Reeve;L.F. Thompson;K. Affholderbach;A. Böhrer;S. Brandt;G. Cowan;C. Grupen;P. Saraiva;L. Smolik;F. Stephan;M. Apollonio;L. Bosisio;R. Della Marina;G. Giannini;B. Gobbo;G. Musolino;J. Rothberg;S. Wasserbaech;S.R. Armstrong;E. Charles;P. Elmer;D.P.S. Ferguson;Y. Gao;S. González;T.C. Greening;O.J. Hayes;H. Hu;S. Jin;P.A. McNamara III;J.M. Nachtman;J. Nielsen;W. Orejudos;Y.B. Pan;Y. Saadi;I.J. Scott;J. Walsh;Sau Lan Wu;X. Wu;G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 425:(1998), pp. 215-226. [10.1016/S0370-2693(98)00180-4]
Resonant structure and flavour tagging in the Bπ± system using fully reconstructed B decays
FOCARDI, ETTORE;CIULLI, VITALIANO;
1998
Abstract
Starting from a sample of four million hadronic Z decays collected with the ALEPH detector at LEP, 404 charged and neutral B mesons are fully reconstructed and used to look for resonant structure in the Bπ system. An excess of events is observed above the expected background in the Bπ mass spectrum at a mass ≈5.7 GeV/c2, consistent with the production and decay to B(∗)π of the B∗∗ states predicted by Heavy Quark Symmetry (HQS). In the framework of HQS, it is found that the mass of the state is MeV/c2 and the relative production rate of the B∗∗ system is . In the same sample of B mesons, significant Bπ± charge-flavour correlations are observed, which may prove important for tagging the initial B state in future CP violation studies.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.