A data sample of about 3.0 million hadronicZ decays collected by the ALEPH experiment at LEP in the years 1991 through 1994 is used to make an inclusive selection of B hadron events. In this event sample 4227±140±252B* mesons in the decayB*→Bγ and 1944±108±161B** u,d mesons decaying into a B meson and a charged pion are reconstructed. Here and in the followingB** u,d denotes the eightL=1(bū) and (bd) states and their charge conjugate. For the well establishedB* meson the following quantities are obtained:ΔM=M B*−MB=(45.30±0.35±0.87) MeV/c2 andN B*/(N B+N B*)=(77.1±2.6±7.0)%. The angular distribution of the photons in theB* rest frame is used to measure the relative contribution of longitudinalB* polarization states to beσ L/(σ L+σ T)=(33±6±5)%. In theM(Bπ)−M(B) mass difference resonance structure is observed at (424±4±10) MeV/c2, for which the shape and position is consistent with the expectation forB** u,d states decaying intoB(*)π ±. The relative production rate is determined to be where the third error reflects the uncertainty due to different production and decay models for the broadB** u,d states.

Production of excited beauty states inZ decays / D. Buskulic;D. Casper;I. Bonis;D. Decamp;P. Ghez;C. Goy;J. -P. Lees;A. Lucotte;M. -N. Minard;P. Odier;B. Pietrzyk;F. Ariztizabal;M. Chmeissani;J. M. Crespo;I. Efthymiopoulos;E. Fernandez;M. Fernandez-Bosman;V. Gaitan;Ll Garrido;M. Martinez;S. Orteu;A. Pacheco;C. Padilla;F. Palla;A. Pascual;J. A. Perlas;F. Sanchez;F. Teubert;A. Colaleo;D. Creanza;M. Palma;A. Farilla;G. Gelao;M. Girone;G. Iaselli;G. Maggi;M. Maggi;N. Marinelli;S. Natali;S. Nuzzo;A. Ranieri;G. Raso;F. Romano;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;G. Zito;X. Huang;J. Lin;Q. Ouyang;T. Wang;Y. Xie;R. Xu;S. Xue;J. Zhang;L. Zhang;W. Zhao;G. Bonvicini;M. Cattaneo;P. Comas;P. Coyle;H. Drevermann;A. Engelhardt;R. W. Forty;M. Frank;R. Hagelberg;J. Harvey;R. Jacobsen;P. Janot;B. Jost;J. Knobloch;I. Lehraus;C. Markou;E. B. Martin;P. Mato;H. Meinhard;A. Minten;R. Miquel;T. Oest;P. Palazzi;J. R. Pater;J. -F. Pusztaszeri;F. Ranjard;P. Rensing;L. Rolandi;D. Schlatter;M. Schmelling;O. Schneider;W. Tejessy;I. R. Tomalin;A. Venturi;H. Wachsmuth;W. Wiedenmann;T. Wildish;W. Witzeling;J. Wotschack;Z. Ajaltouni;M. Bardadin-Otwinowska;A. Barres;C. Boyer;A. Falvard;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;S. Monteil;J -C. Montret;D. Pallin;P. Perret;F. Podlyski;J. Proriol;J. -M. Rossignol;F. Saadi;T. Fearnley;J. B. Hansen;J. D. Hansen;J. R. Hansen;P. H. Hansen;B. S. Nilsson;A. Kyriakis;E. Simopoulou;I. Siotis;A. Vayaki;K. Zachariadou;A. Blondel;G. Bonneaud;J. C. Brient;P. Bourdon;L. Passalacqua;A. Rougé;M. Rumpf;R. Tanaka;A. Valassi;M. Verderi;H. Videau;D. J. Candlin;M. I. Parsons;E. Focardi;G. Parrini;M. Corden;M. Delfino;C. Georgiopoulos;D. E. Jaffe;A. Antonelli;G. Bencivenni;G. Bologna;F. Bossi;P. Campana;G. Capon;V. Chiarella;G. Felici;P. Laurelli;G. Mannocchi;F. Murtas;G. P. Murtas;M. Pepe-Altarelli;S. J. Dorris;A. W. Halley;I. Have;I. G. Knowles;J. G. Lynch;W. T. Morton;V. O’Shea;C. Raine;P. Reeves;J. M. Scarr;K. Smith;M. G. Smith;A. S. Thompson;F. Thomson;S. Thorn;R. M. Turnbull;U. Becker;O. Braun;C. Geweniger;G. Graefe;P. Hanke;V. Hepp;E. E. Kluge;A. Putzer;B. Rensch;M. Schmidt;J. Sommer;H. Stenzel;K. Tittel;S. Werner;M. Wunsch;R. Beuselinck;D. M. Binnie;W. Cameron;D. J. Colling;P. J. Dornan;N. Konstantinidis;L. Moneta;A. Moutoussi;J. Nash;G. San Martin;J. K. Sedgbeer;A. M. Stacey;G. Dissertori;P. Girtler;E. Kneringer;D. Kuhn;G. Rudolph;C. K. Bowdery;T. J. Brodbeck;P. Colrain;G. Crawford;A. J. Finch;F. Foster;G. Hughes;T. Sloan;E. P. Whelan;M. I. Williams;A. Galla;A. M. Greene;K. Kleinknecht;G. Quast;J. Raab;B. Renk;H. -G. Sander;R. Wanke;C. Zeitnitz;J. J. Aubert;A. M. Bencheikh;C. Benchouk;A. Bonissent;G. Bujosa;D. Calvet;J. Carr;C. Diaconu;F. Etienne;M. Thulasidas;D. Nicod;P. Payre;D. Rousseau;M. Talby;I. Abt;R. Assmann;C. Bauer;W. Blum;D. Brown;H. Dietl;F. Dydak;G. Ganis;C. Gotzhein;K. Jakobs;H. Kroha;G. Lütjens;G. Lutz;W. Männer;H. -G. Moser;R. Richter;A. Rosado-Schlosser;S. Schael;R. Settles;H. Seywerd;U. Stierlin;R. St. Denis;G. Wolf;R. Alemany;J. Boucrot;O. Callot;A. Cordier;F. Courault;M. Davier;L. Duflot;J. -F. Grivaz;Ph Heusse;M. Jacquet;D. W. Kim;F. Diberder;J. Lefrançois;A. -M. Lutz;G. Musolino;I. Nikolic;H. J. Park;I. C. Park;M. -H. Schune;S. Simion;J. -J. Veillet;I. Videau;D. Abbaneo;P. Azzurri;G. Bagliesi;G. Batignani;S. Bettarini;C. Bozzi;G. Calderini;M. Carpinelli;M. A. Ciocci;V. Ciulli;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;G. Rizzo;G. Sanguinetti;A. Sciabà;P. Spagnolo;J. Steinberger;R. Tenchini;G. Tonelli;G. Triggiani;C. Vannini;P. G. Verdini;J. Walsh;A. P. Betteridge;G. A. Blair;L. M. Bryant;F. Cerutti;Y. Gao;M. G. Green;D. L. Johnson;T. Medcalf;Ll M. Mir;P. Perrodo;J. A. Strong;V. Bertin;D. R. Botterill;R. W. Clifft;T. R. Edgecock;S. Haywood;M. Edwards;P. Maley;P. R. Norton;J. C. Thompson;B. Bloch-Devaux;P. Colas;H. Duarte;S. Emery;W. Kozanecki;E. Lançon;M. C. Lemaire;E. Locci;B. Marx;P. Perez;J. Rander;J. -F. Renardy;A. Rosowsky;A. Roussarie;J. -P. Schuller;J. Schwindling;D. Si Mohand;A. Trabelsi;B. Vallage;R. P. Johnson;H. Y. Kim;A. M. Litke;M. A. McNeil;G. Taylor;A. Beddall;C. N. Booth;R. Boswell;S. Cartwright;F. Combley;I. Dawson;A. Koksal;M. Letho;W. M. Newton;C. Rankin;L. F. Thompson;A. Böhrer;S. Brandt;G. Cowan;E. Feigl;C. Grupen;G. Lutters;J. Minguet-Rodriguez;F. Rivera;P. Saraiva;L. Smolik;F. Stephan;P. Gemmeren;M. Apollonio;L. Bosisio;R. Marina;G. Giannini;B. Gobbo;F. Ragusa;J. Rothberg;S. Wasserbaech;S. R. Armstrong;L. Bellantoni;P. Elmer;Z. Feng;D. P. S. Ferguson;Y. S. Gao;S. González;J. Grahl;J. L. Harton;O. J. Hayes;H. Hu;P. A. McNamara;J. M. Nachtman;W. Orejudos;Y. B. Pan;Y. Saadi;M. Schmitt;I. J. Scott;V. Sharma;J. D. Turk;A. M. Walsh;Sau Lan Wu;X. Wu;J. M. Yamartino;M. Zheng;G. Zobernig. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - ELETTRONICO. - 69:(1995), pp. 393-404. [10.1007/BF02907419]

Production of excited beauty states inZ decays

FOCARDI, ETTORE;CIULLI, VITALIANO;
1995

Abstract

A data sample of about 3.0 million hadronicZ decays collected by the ALEPH experiment at LEP in the years 1991 through 1994 is used to make an inclusive selection of B hadron events. In this event sample 4227±140±252B* mesons in the decayB*→Bγ and 1944±108±161B** u,d mesons decaying into a B meson and a charged pion are reconstructed. Here and in the followingB** u,d denotes the eightL=1(bū) and (bd) states and their charge conjugate. For the well establishedB* meson the following quantities are obtained:ΔM=M B*−MB=(45.30±0.35±0.87) MeV/c2 andN B*/(N B+N B*)=(77.1±2.6±7.0)%. The angular distribution of the photons in theB* rest frame is used to measure the relative contribution of longitudinalB* polarization states to beσ L/(σ L+σ T)=(33±6±5)%. In theM(Bπ)−M(B) mass difference resonance structure is observed at (424±4±10) MeV/c2, for which the shape and position is consistent with the expectation forB** u,d states decaying intoB(*)π ±. The relative production rate is determined to be where the third error reflects the uncertainty due to different production and decay models for the broadB** u,d states.
1995
69
393
404
D. Buskulic;D. Casper;I. Bonis;D. Decamp;P. Ghez;C. Goy;J. -P. Lees;A. Lucotte;M. -N. Minard;P. Odier;B. Pietrzyk;F. Ariztizabal;M. Chmei...espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/638499
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 18
  • ???jsp.display-item.citation.isi??? ND
social impact