The neutrino energy spectrum in semileptonic b-hadron decays with identified energetic electrons and muons has been measured. The observed relative energy sharing between the neutrino and the charged lepton is found to be well described with a W-+/- polarization obtained from a free b-quark decay model with a (V-A)x(V-A) decay structure. The alternative of a (V+A) x(V-A) decay structure is excluded with a significance of more than 6 standard deviations. The possibility that hadronic corrections to the b-hadron decay destroy any W-+/- polarization is disfavored by more than 3 standard deviations.
Measurement of the Weak Charged Current Structure In Semileptonic B-hadron Decays At the Z-peak / M. ACCIARRI;A. ADAM;O. ADRIANI;M. AGUILARBENITEZ;S. AHLEN;J. ALCARAZ;A. ALOISIO;G. ALVERSON;M. G. ALVIGGI;G. AMBROSI;Q. AN;H. ANDERHUB;A. L. ANDERSON;V. P. ANDREEV;T. ANGELESCU;L. ANTONOV;D. ANTREASYAN;G. ALKHAZOV;A. AREFIEV;T. AZEMOON;T. AZIZ;P. V. K.;P. BAGNAIA;J. A. BAKKEN;L. BAKSAY;R. C. BALL;S. BANERJEE;K. BANICZ;R. BARILLERE;L. BARONE;A. BASCHIROTTO;M. BASILE;R. BATTISTON;A. BAY;F. BECATTINI;U. BECKER;F. BEHNER;G. L. BENCZE;J. BERDUGO;Y. BERGES;B. BERTUCCI;B. L. BETEV;M. BIASINI;A. BILAND;G. M. BILEI;R. BIZZARRI;J. J. BLAISING;G. J. BOBBINK;R. BOCK;A. BOHM;B. BORGIA;A. BOUCHAM;D. BOURILKOV;M. BOURQUIN;D. BOUTIGNY;B. BOUWENS;E. BRAMBILLA;J. G. BRANSON;V. BRIGLJEVIC;I. C. BROCK;M. BROOKS;A. BUJAK;J. D. BURGER;W. J. BURGER;C. BURGOS;J. BUSENITZ;A. BUYTENHUIJS;A. BYKOV;X. D. CAI;M. CAPELL;G. C. ROMEO;M. CARIA;G. CARLINO;A. M. CARTACCI;J. CASAUS;G. CASTELLINI;R. CASTELLO;N. CAVALLO;M. CERRADA;F. CESARONI;M. CHAMIZO;Y. H. CHANG;U. K. CHATURVEDI;M. CHEMARIN;A. CHEN;C. CHEN;G. CHEN;G. M. CHEN;H. F. CHEN;H. S. CHEN;M. CHEN;G. CHIEFARI;C. Y. CHIEN;M. T. CHOI;S. CHUNG;L. CIFARELLI;F. CINDOLO;C. CIVININI;I. CLARE;R. CLARE;T. E. COAN;H. O. COHN;G. COIGNET;N. COLINO;V. COMMICHAU;S. COSTANTINI;F. COTOROBAI;B. DELACRUZ;X. T. CUI;X. Y. CUI;T. S. DAI;R. DALESSANDRO;R. DEASMUNDIS;A. DEGRE;K. DEITERS;E. DENES;P. DENES;F. DENOTARISTEFANI;D. DIBITONTO;M. DIEMOZ;H. R. DIMITROV;C. DIONISI;M. DITTMAR;I. DORNE;M. T. DOVA;E. DRAGO;D. DUCHESNEAU;F. DUHEM;P. DUINKER;I. DURAN;S. DUTTA;S. EASO;H. ELMAMOUNI;A. ENGLER;F. J. EPPLING;F. C. ERNE;P. EXTERMANN;R. FABBRETTI;M. FABRE;S. FALCIANO;A. FAVARA;J. FAY;M. FELCINI;T. FERGUSON;D. FERNANDEZ;G. FERNANDEZ;F. FERRONI;H. FESEFELDT;E. FIANDRINI;J. H. FIELD;F. FILTHAUT;P. H. FISHER;G. FORCONI;L. FREDJ;K. FREUDENREICH;M. GAILLOUD;Y. GALAKTIONOV;E. GALLO;S. N. GANGULI;P. GARCIAABIA;S. S. GAU;S. GENTILE;J. GERALD;N. GHEORDANESCU;S. GIAGU;S. GOLDFARB;J. GOLDSTEIN;Z. F. GONG;E. GONZALEZ;A. GOUGAS;D. GOUJON;G. GRATTA;M. W. GRUENEWALD;C. GU;M. GUANZIROLI;V. K. GUPTA;A. GURTU;H. R. GUSTAFSON;L. J. GUTAY;B. HARTMANN;A. HASAN;D. HAUSCHILDT;J. T. HE;T. HEBBEKER;M. HEBERT;A. HERVE;K. HILGERS;H. HOFER;H. HOORANI;S. R. HOU;G. HU;B. ILLE;M. M. ILYAS;V. INNOCENTE;H. JANSSEN;B. N. JIN;L. W. JONES;P. DEJONG;I. JOSAMUTUBERRIA;A. KASSER;R. A. KHAN;Y. KAMYSHKOV;P. KAPINOS;J. S. KAPUSTINSKY;Y. KARYOTAKIS;M. KAUR;S. KHOKHAR;M. N. KIENZLEFOCACCI;D. KIM;J. K. KIM;S. C. KIM;Y. G. KIM;W. W. KINNISON;A. KIRKBY;D. KIRKBY;J. KIRKBY;S. KIRSCH;W. KITTEL;A. KLIMENTOV;A. C. KONIG;E. KOFFEMAN;O. KORNADT;V. KOUTSENKO;A. KOULBARDIS;R. W. KRAEMER;T. KRAMER;V. R. KRASTEV;W. KRENZ;H. KUIJTEN;A. KUNIN;P. DEGUEVARA;G. LANDI;S. LANZANO;P. LAURIKAINEN;A. LEBEDEV;P. LEBRUN;P. LECOMTE;P. LECOQ;P. LECOULTRE;D. M. LEE;J. S. LEE;K. Y. LEE;I. LEEDOM;C. LEGGETT;J. M. LEGOFF;R. LEISTE;M. LENTI;E. LEONARDI;P. LEVTCHENKO;C. LI;E. LIEB;W. T. LIN;F. L. LINDE;B. LINDEMANN;L. LISTA;Y. LIU;W. LOHMANN;E. LONGO;W. LU;Y. S. LU;K. LUBELSMEYER;C. LUCI;D. LUCKEY;L. LUDOVICI;L. LUMINARI;W. LUSTERMANN;W. G. MA;M. MACDERMOTT;M. MAITY;L. MALGERI;R. MALIK;A. MALININ;C. MANA;S. MANGLA;M. MAOLINBAY;P. MARCHESINI;A. MARIN;J. P. MARTIN;F. MARZANO;G. G. G.;K. MAZUMDAR;T. MCMAHON;D. MCNALLY;S. MELE;M. MERK;L. MEROLA;M. MESCHINI;W. J. METZGER;Y. MI;A. MIHUL;G. B. MILLS;Y. MIR;G. MIRABELLI;J. MNICH;M. MOLLER;V. MONACO;B. MONTELEONI;R. MORAND;S. MORGANTI;N. E. MOULAI;R. MOUNT;S. MULLER;E. NAGY;M. NAPOLITANO;F. NESSITEDALDI;H. NEWMAN;M. A. NIAZ;A. NIPPE;H. NOWAK;G. ORGANTINI;R. OSTONEN;D. PANDOULAS;S. PAOLETTI;P. PAOLUCCI;G. PASCALE;G. PASSALEVA;S. PATRICELLI;T. PAUL;M. PAULUZZI;C. PAUS;F. PAUSS;Y. J. PEI;S. PENSOTTI;D. PERRETGALLIX;A. PEVSNER;D. PICCOLO;M. PIERI;J. C. PINTO;P. A. PIROUE;E. PISTOLESI;F. PLASIL;V. PLYASKIN;M. POHL;V. POJIDAEV;H. POSTEMA;N. PRODUIT;J. M. QIAN;K. N. QURESHI;R. RAGHAVAN;G. RAHALCALLOT;P. G. RANCOITA;M. RATTAGGI;G. RAVEN;P. RAZIS;K. 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Measurement of the Weak Charged Current Structure In Semileptonic B-hadron Decays At the Z-peak
ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;M. LENTI;
1995
Abstract
The neutrino energy spectrum in semileptonic b-hadron decays with identified energetic electrons and muons has been measured. The observed relative energy sharing between the neutrino and the charged lepton is found to be well described with a W-+/- polarization obtained from a free b-quark decay model with a (V-A)x(V-A) decay structure. The alternative of a (V+A) x(V-A) decay structure is excluded with a significance of more than 6 standard deviations. The possibility that hadronic corrections to the b-hadron decay destroy any W-+/- polarization is disfavored by more than 3 standard deviations.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.