Measurement of the B-s(0) lifetime in the exclusive decay channel B-s(0)-> J/psi phi
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
04/02/2005
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Resumo |
Using the exclusive decay B-s(0)-->J/psi(mu(+)mu(-))phi(K+K-), we report the most precise single measurement of the B-s(0) lifetime. The data sample corresponds to an integrated luminosity of approximately 220 pb(-1) collected with the D0 detector at the Fermilab Tevatron Collider in 2002-2004. We reconstruct 337 signal candidates, from which we extract the B-s(0) lifetime, tau(B-s(0))=1.444(-0.090)(+0.098)(stat)+/-0.020(sys) ps. We also report a measurement for the lifetime of the B-0 meson using the exclusive decay B-0-->J/psi(mu(+)mu(-))K-*0(892)(K(+)pi(-)). We reconstruct 1370 signal candidates, obtaining tau(B-0)=1.473(-0.050)(+0.052)(stat)+/-0.023(sys) ps, and the ratio of lifetimes, tau(B-s(0))/tau(B-0)=0.980(-0.071)(+0.076)(stat)+/-0.003(sys). |
Formato |
7 |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.94.042001 Physical Review Letters. College Pk: American Physical Soc, v. 94, n. 4, 7 p., 2005. 0031-9007 http://hdl.handle.net/11449/23275 10.1103/PhysRevLett.94.042001 WOS:000226779000018 WOS000226779000018.pdf |
Idioma(s) |
eng |
Publicador |
American Physical Soc |
Relação |
Physical Review Letters |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |