Time-dependent B-d(0)-(B) over bar(d)(0) mixing is studied using 1.5 million hadronic Z decays collected by L3. Semileptonic B decays are selected by requiring at least one reconstructed lepton in both thrust hemispheres. Charge correlations between the tagged leptons are studied as a function of proper time. The proper time of the b-hadron decay is measured by reconstructing the production and decay vertices using a silicon microvertex detector: The measured B-d(0) meson oscillation frequency corresponds to a mass difference Delta m(d) between the two B-d(0) mass eigenstates of Delta m(d) = (0.496(-0.051)(+0.053) (stat) +/- 0.043 (syst)) ps(-1).
Measurement of the B-d(0) meson oscillation frequency / M. Acciarri;O. Adriani;M. AguilarBenitez;S. Ahlen;B. Alpat;J. Alcaraz;G. Alemanni;J. Allaby;A. Aloisio;G. Alverson;M. G. Alviggi;G. Ambrosi;H. Anderhub;V. P. Andreev;T. Angelescu;D. Antreasyan;A. Arefiev;T. Azemoon;T. Aziz;P. Bagnaia;L. Baksay;R. C. Ball;S. Banerjee;K. Banicz;R. Barillere;L. Barone;P. Bartalini;A. Baschirotto;M. Basile;R. Battiston;A. Bay;F. Becattini;U. Becker;F. Behner;J. Berdugo;P. Berges;B. Bertucci;B. L. Betev;M. Biasini;A. Biland;G. M. Bilei;J. J. Blaising;S. C. Blyth;G. J. Bobbink;R. Bock;A. Bohm;B. Borgia;A. Boucham;D. Bourilkov;M. Bourquin;D. Boutigny;E. Brambilla;J. G. Branson;V. Brigljevic;I. C. Brock;A. Buijs;J. D. Burger;W. J. Burger;J. Busenitz;A. Buytenhuijs;X. D. Cai;M. Campanelli;M. Capell;G. C. Romeo;M. Caria;G. Carlino;A. M. Cartacci;J. Casaus;G. Castellini;R. Castello;F. Cavallari;N. Cavallo;C. Cecchi;M. Cerrada;F. Cesaroni;M. Chamizo;A. Chan;Y. H. Chang;U. K. Chaturvedi;M. Chemarin;A. Chen;G. 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Measurement of the B-d(0) meson oscillation frequency
ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;M. Lenti;
1996
Abstract
Time-dependent B-d(0)-(B) over bar(d)(0) mixing is studied using 1.5 million hadronic Z decays collected by L3. Semileptonic B decays are selected by requiring at least one reconstructed lepton in both thrust hemispheres. Charge correlations between the tagged leptons are studied as a function of proper time. The proper time of the b-hadron decay is measured by reconstructing the production and decay vertices using a silicon microvertex detector: The measured B-d(0) meson oscillation frequency corresponds to a mass difference Delta m(d) between the two B-d(0) mass eigenstates of Delta m(d) = (0.496(-0.051)(+0.053) (stat) +/- 0.043 (syst)) ps(-1).I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.