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Measurement of the B-s(0) lifetime in the exclusive decay channel B-s(0)-> J/psi phi
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2005 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 94, no 4, 042001- p.Article in journal (Refereed) Published
Abstract [en]

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).

Place, publisher, year, edition, pages
2005. Vol. 94, no 4, 042001- p.
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-73453DOI: 10.1103/PhysRevLett.94.042001ISI: 000226779000018ScopusID: 2-s2.0-18044386173OAI: diva2:488978
QC 20120202Available from: 2012-02-02 Created: 2012-02-02 Last updated: 2012-02-02Bibliographically approved

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Clément, ChristopheStrandberg, Jonas
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