We have measured the number of like-sign (LS) and opposite-sign (OS) lepton pairs arising from double semileptonic decays of b and (b) over bar hadrons, pair produced at the Fermilab Tevatron collider. The data samples were collected with the Collider Detector at Fermilab during the 1992-1995 collider run by triggering on the existence of mumu or emu candidates in an event. The observed ratio of LS to OS dileptons leads to a measurement of the average time-integrated mixing probability of all produced b-flavored hadrons which decay weakly, (chi) over bar =0.152+/-0.007 (stat)+/-0.011 (syst), that is significantly larger than the world average (chi) over bar =0.118+/-0.005.
Measurement of the average time-integrated mixing probability of b-flavored hadrons produced at the Fermilab Tevatron RID C-1693-2008 RID A-5169-2010 RID E-4473-2011 RID C-2406-2008
DELL'ORSO, MAURO;DONATI, SIMONE;PUNZI, GIOVANNI;
2004-01-01
Abstract
We have measured the number of like-sign (LS) and opposite-sign (OS) lepton pairs arising from double semileptonic decays of b and (b) over bar hadrons, pair produced at the Fermilab Tevatron collider. The data samples were collected with the Collider Detector at Fermilab during the 1992-1995 collider run by triggering on the existence of mumu or emu candidates in an event. The observed ratio of LS to OS dileptons leads to a measurement of the average time-integrated mixing probability of all produced b-flavored hadrons which decay weakly, (chi) over bar =0.152+/-0.007 (stat)+/-0.011 (syst), that is significantly larger than the world average (chi) over bar =0.118+/-0.005.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
