A new measurement of the forward-backward asymmetry in Z --> bbBAR decays is presented. Hadrons from b decays are tagged using their long lifetimes. The b quark charge and direction are reconstructed with a hemisphere charge algorithm. The asymmetry and reconstructed b hemisphere charge are measured in the 69 pb-1 of data collected by ALEPH during 1991, 1992 and 1993. They are used to extract sin2theta(w)eff, which is determined to be 0.2315 +/- 0.0016 (stat.) +/- 0.0009 (syst.), corresponding to an A(FB)b of 0.00992 +/- 0.0084 (stat.) +/- 0.0046 (stat.).

A Measurement of A(fb)(b) In Lifetime Tagged Heavy Flavor Z Decays / D. BUSKULIC;D. CASPER;I. DEBONIS;D. DECAMP;P. GHEZ;C. GOY;J. P. LEES;M. N. MINARD;P. ODIER;B. PETRZYK;F. ARIZTIZABAL;M. CHMEISSANI;J. M. CRESPO;I. EFTHYMIOPOULOS;E. FERNANDEZ;M. FERNANDEZBOSMAN;V. GAITAN;L. I. GARRIDO;M. MARTINEZ;T. MATTISON;S. ORTEU;A. PACHECO;C. PADILLO;F. PALLA;A. PASCUAL;J. A. PERLAS;F. TEUBERT;D. CREANZA;M. DEPALMA;A. FARILLA;G. IASELLI;G. MAGGI;N. MARINELLI;S. NATALI;S. NUZZO;A. RANIERI;G. RASO;F. ROMANO;F. RUGGIERI;G. SELVAGGI;L. SILVESTRIS;P. TEMPESTA;G. ZITO;Y. CHAI;D. HUANG;X. HUANG;J. LIN;T. WANG;Y. XIE;D. XU;R. XU;J. ZHANG;L. ZHANG;W. ZHAO;G. BONVICINI;J. BOUDREAU;P. COMAS;P. COYLE; DREVERMANN;A. ENGELHARDT;R. W. FORTY;G. GANIS;C. GAY;M. GIRONE;R. HAGELBERG;J. HARVEY;R. JACOBSEN;B. JOST;J. KNOBLOCH;I. LEHRAUS;M. MAGGI;C. MARKOU;P. MATO;H. MEINHARD;A. MINTEN;R. MIQUEL;P. PALAZZI;J. R. PATER;P. PERRODO;J. F. PUSZTASZERI;F. RANJARD;L. ROLANDI;J. ROTHBERG;M. SAICH;D. SCHLATTER;M. SCHMELLING;W. TEJESSY;I. R. TOMALIN;R. VEENHOF;A. VENTURI;H. WACHSMUTH;S. WASSERBAECH;W. WIEDENMANN;T. WILDISH;W. WITZELING;J. WOTSCHACK;Z. AJALTOUNI;M. BARDADINOTWINOWSKA;A. BARRES;C. BOYER;A. FALVARD;P. GAY;C. GUICHENEY;P. HENRARD;J. JOUSSET;B. MICHEL;J. C. MONTRET;D. PALLIN;P. PERRET;F. PODLYSKI;J. PRORJOL;F. SAADI;T. FEARNLEY;J. B. HANSEN;J. D. HANSEN;J. R. HANSEN;P. H. HANSEN;S. D. JOHNSON;R. MOLLERUD;B. S. NILSSON;A. KYRIAKIS;E. SIMOPOULOU;I. SIOTIS;A. VAYAKI;K. ZACHARIADOU;A. BLONDEL;G. BONNEAUD;J. C. BRIENT;P. BOURON;L. PASSALACQUA;A. ROUGE;M. RUMPF;R. TANAKA;A. VALASSI;M. VERDERI;H. VIDEAU;D. J. CANDLIN;M. I. PARSONS;E. VEITCH;E. FOCARDI;G. PARRINI;M. CORDEN;M. DELFINO;C. GEORGIOPOULOS;D. E. JAFFE;D. LEVINTHAL;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;M. PEPEALTARELLI;S. SALOMONE;P. COLRAIN;I. TENHAVE;I. G. KNOWLES;J. G. LYNCH;W. MAITLAND;W. T. MORTON;C. RAINE;P. REEVES;J. M. SCARR;K. SMITH;M. G. SMITH;A. S. THOMPSON;S. THORN;R. M. TURNBULL;U. BECKER;O. OBRAUN;C. GEWENIGER;P. HANKE;V. HEPP;E. E. KLUGE;A. PUTZER;B. RENSCH;M. SCHMIDT;H. STENZEL;K. TITTEL;M. WUNSCH;R. BEUSELINCK;D. M. BINNIE;W. CAMERON;M. CATTANEO;D. J. COLLING;P. J. DORNAN;J. F. HASSARD;N. KONSTANTINIDIS;L. MONETA;A. MOUTOUSSI;J. NASH;D. G. PAYNE;G. SANMARTIN;J. K. SEDGBEER;A. G. WRIGHT;P. GIRTLER;D. KUHN;G. RUDOLPH;R. VOGL;C. K. BOWDERY;T. J. BRODBECK;A. J. FINCH;F. FOSTER;G. HUGHES;D. JACKSON;N. R. KEEMER;M. NUTTALL;A. PATEL;T. SLOAN;S. W. SNOW;E. P. WHELAN;A. GALLA;A. M. GREENE;K. KLEINKNECHT;J. RAAB;B. RENK;H. G. SANDER;H. SCHMIDT;S. M. WALTHER;R. WANKE;B. WOLF;A. M. BENCHEIKH;C. BENCHOUK;A. BONISSENT;D. CALVERT;J. CARR;C. DIACONU;F. ETIENNE;D. NICOD;P. PAYRE;L. ROOS;D. ROUSSEAU;P. SCHWEMLING;M. TALBY;S. ADLUNG;R. ASSMANN;C. BAUER;W. BLUM;D. BROWN;P. CATTANEO;B. DEHNING;H. DIETL;F. DYDAK;M. FRANK;A. W. HALLEY;K. JAKOBS;H. KROHA;J. LAUBER;G. LUTJENS;G. LUTZ;W. MANNER;H. G. MOSER;R. RCHTER;S. SCHAEL;J. SCHRODER;A. S. SCHWARZ;R. SETTLES;H. SEYWERE;U. STIERLIN;U. STIEGLER;R. STDENIS;G. WOLF;R. ALEMANY;J. BOUCROT;O. CALLOT;A. CORDIER;F. COURAULT;M. DAVIER;L. DUFLOT;J. F. GRIVAZ;P. HEUSSE;P. JANOT;M. JACQUET;D. W. KIMTR;F. LEDIBERDER;J. LEFRANCOIS;A. M. LUTZ;G. MUSOLINO;I. NIKOLIC;H. J. PARK;I. C. PARK;S. SIMION;M. H. SCHUENE;J. J. VEILLET;I. VIDEAU;D. ABBANEO;G. BAGLIESI;G. BATIGNANI;U. BOTTIGLI;C. BOZZI;G. CALDERINI;M. CARPINELLI;M. A. CIOCCI;V. CIULLI;R. DELLORSO;I. FERRANTE;F. FIDECARO;L. FOA;F. FORTI;A. GIASSI;M. A. GIORGI;A. GREGORIO;F. LIGABUE;A. LUSIANI;P. S. MARROCCHESI;E. B. MARTIN;A. MESSINEO;G. RIZZO;G. SANGUINETTI;P. SPAGNOLO;J. STEINBERGER;R. TENCHINI;G. TONELLI;G. TRIGGIANI;C. VANNINI;P. G. VERDINI;J. WALSH;A. P. BETTERIDGE;Y. GAO;M. G. GREEN;D. L. JOHNSON;P. V. MARCH;T. MEDCALF;L. M. MIR;I. S. QUAZI;J. A. STRONG;V. BERTIN;D. R. BOTTERILL;R. W. CLIFFT;T. R. EDGECOCK;S. HAYWOOD;M. EDWARDS;P. R. NORTON;J. C. THOMPSON;B. BLOCHDEVAUX;P. COLAS;H. DUARTE;S. EMERY;W. KOZANECKI;E. LANCON;M. C. LEMAIRE;E. LOCCI;B. MARX;P. PEREZ;J. RANDER;J. F. RENARDY;A. ROSOWSKY;A. ROUSSARIE;J. P. SCHULLER;J. SCHWINDLING;D. S. MOHAND;B. VALLAGE;R. P. JOHNSON;A. M. LITKE;G. TAYLOR;J. WEAR;A. BEDDALL;C. BOOTH;S. CARTWRIGHT;F. COMBLEY;I. DAWSON;A. KOKSAL;C. RANKIN;L. F. THOMPSON;A. BOHRER;S. BRANDT;G. COWAN;E. FEIGL;C. GRUPEN;G. LUTTERS;J. MINGUETRODRIGUEZ;F. RIVERA;P. SARAIVA;U. SCHAFER;L. SMOLIK;L. BOSSISIO;R. DELLAMARINA;G. GIANNINI;B. GOBBO;L. PITIS;F. RAGUSA;L. BELLANTONI;J. S. CONWAY;Z. FENG;D. P. S.;Y. S. GAO;J. GRAHL;J. L. HARTON;O. J. HAYES;H. HU;J. M. NACHTMAN;Y. B. PAN;Y. SAADI;M. SCHMITT;I. SCOTT;V. SHARMA;J. D. TURK;A. M. WALSH;F. V. WEBER;S. L. WU;X. WU;J. M. YAMARTINO;M. ZHENG;G. ZOBERNIG. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 335:(1994), pp. 99-108. [10.1016/0370-2693(94)91564-4]

A Measurement of A(fb)(b) In Lifetime Tagged Heavy Flavor Z Decays

FOCARDI, ETTORE;CIULLI, VITALIANO;
1994

Abstract

A new measurement of the forward-backward asymmetry in Z --> bbBAR decays is presented. Hadrons from b decays are tagged using their long lifetimes. The b quark charge and direction are reconstructed with a hemisphere charge algorithm. The asymmetry and reconstructed b hemisphere charge are measured in the 69 pb-1 of data collected by ALEPH during 1991, 1992 and 1993. They are used to extract sin2theta(w)eff, which is determined to be 0.2315 +/- 0.0016 (stat.) +/- 0.0009 (syst.), corresponding to an A(FB)b of 0.00992 +/- 0.0084 (stat.) +/- 0.0046 (stat.).
335
99
108
D. BUSKULIC;D. CASPER;I. DEBONIS;D. DECAMP;P. GHEZ;C. GOY;J. P. LEES;M. N. MINARD;P. ODIER;B. PETRZYK;F. ARIZTIZABAL;M. CHMEISSANI;J. M. CRESPO;I. EFTHYMIOPOULOS;E. FERNANDEZ;M. FERNANDEZBOSMAN;V. GAITAN;L. I. GARRIDO;M. MARTINEZ;T. MATTISON;S. ORTEU;A. PACHECO;C. PADILLO;F. PALLA;A. PASCUAL;J. A. PERLAS;F. TEUBERT;D. CREANZA;M. DEPALMA;A. FARILLA;G. IASELLI;G. MAGGI;N. MARINELLI;S. NATALI;S. NUZZO;A. RANIERI;G. RASO;F. ROMANO;F. RUGGIERI;G. SELVAGGI;L. SILVESTRIS;P. TEMPESTA;G. ZITO;Y. CHAI;D. HUANG;X. HUANG;J. LIN;T. WANG;Y. XIE;D. XU;R. XU;J. ZHANG;L. ZHANG;W. ZHAO;G. BONVICINI;J. BOUDREAU;P. COMAS;P. COYLE; DREVERMANN;A. ENGELHARDT;R. W. FORTY;G. GANIS;C. GAY;M. GIRONE;R. HAGELBERG;J. HARVEY;R. JACOBSEN;B. JOST;J. KNOBLOCH;I. LEHRAUS;M. MAGGI;C. MARKOU;P. MATO;H. MEINHARD;A. MINTEN;R. MIQUEL;P. PALAZZI;J. R. PATER;P. PERRODO;J. F. PUSZTASZERI;F. RANJARD;L. ROLANDI;J. ROTHBERG;M. SAICH;D. SCHLATTER;M. SCHMELLING;W. TEJESSY;I. R. TOMALIN;R. VEENHOF;A. VENTURI;H. WACHSMUTH;S. WASSERBAECH;W. WIEDENMANN;T. WILDISH;W. WITZELING;J. WOTSCHACK;Z. AJALTOUNI;M. BARDADINOTWINOWSKA;A. BARRES;C. BOYER;A. FALVARD;P. GAY;C. GUICHENEY;P. HENRARD;J. JOUSSET;B. MICHEL;J. C. MONTRET;D. PALLIN;P. PERRET;F. PODLYSKI;J. PRORJOL;F. SAADI;T. FEARNLEY;J. B. HANSEN;J. D. HANSEN;J. R. HANSEN;P. H. HANSEN;S. D. JOHNSON;R. MOLLERUD;B. S. NILSSON;A. KYRIAKIS;E. SIMOPOULOU;I. SIOTIS;A. VAYAKI;K. ZACHARIADOU;A. BLONDEL;G. BONNEAUD;J. C. BRIENT;P. BOURON;L. PASSALACQUA;A. ROUGE;M. RUMPF;R. TANAKA;A. VALASSI;M. VERDERI;H. VIDEAU;D. J. CANDLIN;M. I. PARSONS;E. VEITCH;E. FOCARDI;G. PARRINI;M. CORDEN;M. DELFINO;C. GEORGIOPOULOS;D. E. JAFFE;D. LEVINTHAL;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;M. PEPEALTARELLI;S. SALOMONE;P. COLRAIN;I. TENHAVE;I. G. KNOWLES;J. G. LYNCH;W. MAITLAND;W. T. MORTON;C. RAINE;P. REEVES;J. M. SCARR;K. SMITH;M. G. SMITH;A. S. THOMPSON;S. THORN;R. M. TURNBULL;U. BECKER;O. OBRAUN;C. GEWENIGER;P. HANKE;V. HEPP;E. E. KLUGE;A. PUTZER;B. RENSCH;M. SCHMIDT;H. STENZEL;K. TITTEL;M. WUNSCH;R. BEUSELINCK;D. M. BINNIE;W. CAMERON;M. CATTANEO;D. J. COLLING;P. J. DORNAN;J. F. HASSARD;N. KONSTANTINIDIS;L. MONETA;A. MOUTOUSSI;J. NASH;D. G. PAYNE;G. SANMARTIN;J. K. SEDGBEER;A. G. WRIGHT;P. GIRTLER;D. KUHN;G. RUDOLPH;R. VOGL;C. K. BOWDERY;T. J. BRODBECK;A. J. FINCH;F. FOSTER;G. HUGHES;D. JACKSON;N. R. KEEMER;M. NUTTALL;A. PATEL;T. SLOAN;S. W. SNOW;E. P. WHELAN;A. GALLA;A. M. GREENE;K. KLEINKNECHT;J. RAAB;B. RENK;H. G. SANDER;H. SCHMIDT;S. M. WALTHER;R. WANKE;B. WOLF;A. M. BENCHEIKH;C. BENCHOUK;A. BONISSENT;D. CALVERT;J. CARR;C. DIACONU;F. ETIENNE;D. NICOD;P. PAYRE;L. ROOS;D. ROUSSEAU;P. SCHWEMLING;M. TALBY;S. ADLUNG;R. ASSMANN;C. BAUER;W. BLUM;D. BROWN;P. CATTANEO;B. DEHNING;H. DIETL;F. DYDAK;M. FRANK;A. W. HALLEY;K. JAKOBS;H. KROHA;J. LAUBER;G. LUTJENS;G. LUTZ;W. MANNER;H. G. MOSER;R. RCHTER;S. SCHAEL;J. SCHRODER;A. S. SCHWARZ;R. SETTLES;H. SEYWERE;U. STIERLIN;U. STIEGLER;R. STDENIS;G. WOLF;R. ALEMANY;J. BOUCROT;O. CALLOT;A. CORDIER;F. COURAULT;M. DAVIER;L. DUFLOT;J. F. GRIVAZ;P. HEUSSE;P. JANOT;M. JACQUET;D. W. KIMTR;F. LEDIBERDER;J. LEFRANCOIS;A. M. LUTZ;G. MUSOLINO;I. NIKOLIC;H. J. PARK;I. C. PARK;S. SIMION;M. H. SCHUENE;J. J. VEILLET;I. VIDEAU;D. ABBANEO;G. BAGLIESI;G. BATIGNANI;U. BOTTIGLI;C. BOZZI;G. CALDERINI;M. CARPINELLI;M. A. CIOCCI;V. CIULLI;R. DELLORSO;I. FERRANTE;F. FIDECARO;L. FOA;F. FORTI;A. GIASSI;M. A. GIORGI;A. GREGORIO;F. LIGABUE;A. LUSIANI;P. S. MARROCCHESI;E. B. MARTIN;A. MESSINEO;G. RIZZO;G. SANGUINETTI;P. SPAGNOLO;J. STEINBERGER;R. TENCHINI;G. TONELLI;G. TRIGGIANI;C. VANNINI;P. G. VERDINI;J. WALSH;A. P. BETTERIDGE;Y. GAO;M. G. GREEN;D. L. JOHNSON;P. V. MARCH;T. MEDCALF;L. M. MIR;I. S. QUAZI;J. A. STRONG;V. BERTIN;D. R. BOTTERILL;R. W. CLIFFT;T. R. EDGECOCK;S. HAYWOOD;M. EDWARDS;P. R. NORTON;J. C. THOMPSON;B. BLOCHDEVAUX;P. COLAS;H. DUARTE;S. EMERY;W. KOZANECKI;E. LANCON;M. C. LEMAIRE;E. LOCCI;B. MARX;P. PEREZ;J. RANDER;J. F. RENARDY;A. ROSOWSKY;A. ROUSSARIE;J. P. SCHULLER;J. SCHWINDLING;D. S. MOHAND;B. VALLAGE;R. P. JOHNSON;A. M. LITKE;G. TAYLOR;J. WEAR;A. BEDDALL;C. BOOTH;S. CARTWRIGHT;F. COMBLEY;I. DAWSON;A. KOKSAL;C. RANKIN;L. F. THOMPSON;A. BOHRER;S. BRANDT;G. COWAN;E. FEIGL;C. GRUPEN;G. LUTTERS;J. MINGUETRODRIGUEZ;F. RIVERA;P. SARAIVA;U. SCHAFER;L. SMOLIK;L. BOSSISIO;R. DELLAMARINA;G. GIANNINI;B. GOBBO;L. PITIS;F. RAGUSA;L. BELLANTONI;J. S. CONWAY;Z. FENG;D. P. S.;Y. S. GAO;J. GRAHL;J. L. HARTON;O. J. HAYES;H. HU;J. M. NACHTMAN;Y. B. PAN;Y. SAADI;M. SCHMITT;I. SCOTT;V. SHARMA;J. D. TURK;A. M. WALSH;F. V. WEBER;S. L. WU;X. WU;J. M. YAMARTINO;M. ZHENG;G. ZOBERNIG
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