Abazov, VM;
Abbott, B;
Abolins, M;
Acharya, BS;
Adams, DL;
Adams, M;
Adams, T;
... D0 Collaboration; + view all
(2005)
Measurement of the B-s(0) lifetime in the exclusive decay channel B-s(0)-> J/psi phi.
PHYS REV LETT
, 94
(4)
, Article 042001. 10.1103/PhysRevLett.94.042001.
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Abstract
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).
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