corner
corner

Phys. Rev. Lett. 100, 121803 (2008) [7 pages]

Measurement of Lifetime and Decay-Width Difference in Bs0J/ψϕ Decays

Download: PDF (328 kB) Buy this article Export: BibTeX or EndNote (RIS)

T. Aaltonen et al. CDF Collaboration
Show All Authors/Affiliations

Received 14 December 2007; published 27 March 2008

We measure the mean lifetime τ=2/(ΓL+ΓH) and the decay-width difference ΔΓ=ΓL-ΓH of the light and heavy mass eigenstates of the Bs0 meson, BsL0 and BsH0, in Bs0J/ψϕ decays using 1.7  fb-1 of data collected with the CDF II detector at the Fermilab Tevatron pp̅ collider. Assuming CP conservation, a good approximation for the Bs0 system in the standard model, we obtain ΔΓ=0.076-0.063+0.059(stat)±0.006(syst)  ps-1 and τ=1.52±0.04(stat)±0.02(syst)  ps, the most precise measurements to date. Our constraints on the weak phase and ΔΓ are consistent with CP conservation.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.121803
DOI:
10.1103/PhysRevLett.100.121803
PACS:
13.25.Hw, 11.30.Er, 14.40.Nd