The lifetimes of the B- and (B) over bar(0) mesons are measured using the partially reconstructed semileptonic decays (B) over bar --> Dl(-)<(nu)over bar>X, where D is either a D-0 or D*(+) meson. The data were collected by the CDF detector at the Fermilab Tevatron collider during 1992-1993 and correspond to 19.3 pb(-1) of <(p)over bar p> collisions at root s = 1.8 TeV. We measure the decay length distributions and find the lifetimes to be tau(B-)= 1.56 +/- 0.13 +/- 0.06 ps and tau(($) over bar(0)) = 1.54 +/- 0.08 +/- 0.06 ps, and the ratio of lifetimes to be tau(B-)/tau((B) over bar(0)) = 1.01 +/- 0.11 +/- 0.02, where the first uncertainties are statistical and the second are systematic. RI Vucinic, Dejan/C-2406-2008; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.76.4462 |
Codice identificativo ISI: | WOS:A1996UP53600003 |
Codice identificativo Scopus: | 2-s2.0-0000492231 |
Handle: | http://hdl.handle.net/11695/3966 |
Abstract: | The lifetimes of the B- and (B) over bar(0) mesons are measured using the partially reconstructed semileptonic decays (B) over bar --> Dl(-)<(nu)over bar>X, where D is either a D-0 or D*(+) meson. The data were collected by the CDF detector at the Fermilab Tevatron collider during 1992-1993 and correspond to 19.3 pb(-1) of <(p)over bar p> collisions at root s = 1.8 TeV. We measure the decay length distributions and find the lifetimes to be tau(B-)= 1.56 +/- 0.13 +/- 0.06 ps and tau(($) over bar(0)) = 1.54 +/- 0.08 +/- 0.06 ps, and the ratio of lifetimes to be tau(B-)/tau((B) over bar(0)) = 1.01 +/- 0.11 +/- 0.02, where the first uncertainties are statistical and the second are systematic. RI Vucinic, Dejan/C-2406-2008; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012 |
Titolo: | Measurement of the B- and (B)over-bar(0) meson lifetimes using semileptonic decays |
Autori: | |
Appare nelle tipologie: | 1.1 Articolo in rivista |