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Measurement of the Bs0B_s^0 lifetime in the exclusive decay channel Bs0→J/ψϕB_s^0 \to J/\psi \phi

Collaboration
Sep, 2004
7 pages
Published in:
  • Phys.Rev.Lett. 94 (2005) 042001
e-Print:
DOI:
Report number:
  • FERMILAB-PUB-04-225-E
Experiments:
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Abstract:
Using the exclusive decay B^0_s -> J/psi (mu+mu-) phi(K+K-), we report the most precise single measurement of the B^0_s lifetime. The data sample corresponds to an integrated luminosity of approximately 220 pb-1 collected with the DO detector at the Fermilab Tevatron Collider in 2002-2004. We reconstruct 337 signal candidates, from which we extract the B^0_s lifetime, \tau(B^0_s) = 1.444 +0.098/-0.090 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 +0.052/-0.050 stat +/- 0.023 sys ps, and the ratio of lifetimes, \tau(B^0_s)/\tau(B^0) = 0.980 +0.076/-0.071 stat +/- 0.003 sys.
Note:
  • 7 pages, 4 Figures, Submitted to Physical Review Letters. Minor changes after PRL referees coments Report-no: FERMILAB-Pub-04/225-E
  • 14.40.Nd
  • 13.25.Hw
  • B mesons
  • meson hadronic decay
  • D0
  • anti-p p: colliding beams
  • anti-p p: inclusive reaction
  • bottom: pair production
  • B/s0: hadronic decay
  • B0: hadronic decay