D(s)+ mesons produced in Z(0) --> b (b) over bar events were separated from the Z(0) --> c (c) over bar component using a lifetime tag. Using a sample of 1.5 million hadronic Z decays collected with the ALEPH detector the (B) over bar(s)(0) and Ds(+) yields have been measured.The (B) over bar (s)(0) lifetime was measured in a anti B(s)(0) enriched sample reconstructing the decay length from the vertex of the D(s)+ with a hadron from the (B) over bar (s)(0) decay, The result obtained is: tau_B(s) =(1.61 + (+0.30 -0.29)(stat.) + (+0.18-0.16) (syst.)) ps.
Measurement of D(s)+ meson production in Z decays and of the (B)over-bar(s)(0) lifetime
BATIGNANI, GIOVANNI;BETTARINI, STEFANO;CIOCCI, MARIA AGNESE;FERRANTE, ISIDORO;FORTI, FRANCESCO;GIORGI, MARCELLO;MESSINEO, ALBERTO MARIA;RIZZO, GIULIANA;TONELLI, GUIDO EMILIO;G. Triggiani;
1996-01-01
Abstract
D(s)+ mesons produced in Z(0) --> b (b) over bar events were separated from the Z(0) --> c (c) over bar component using a lifetime tag. Using a sample of 1.5 million hadronic Z decays collected with the ALEPH detector the (B) over bar(s)(0) and Ds(+) yields have been measured.The (B) over bar (s)(0) lifetime was measured in a anti B(s)(0) enriched sample reconstructing the decay length from the vertex of the D(s)+ with a hadron from the (B) over bar (s)(0) decay, The result obtained is: tau_B(s) =(1.61 + (+0.30 -0.29)(stat.) + (+0.18-0.16) (syst.)) ps.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.