corner
corner

Phys. Rev. Lett. 100, 161802 (2008) [7 pages]

First Flavor-Tagged Determination of Bounds on Mixing-Induced CP Violation in Bs0J/ψϕ Decays

Download: PDF (211 kB) Buy this article Export: BibTeX or EndNote (RIS)

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

Received 14 December 2007; published 22 April 2008

This Letter describes the first determination of bounds on the CP-violation parameter 2βs using Bs0 decays in which the flavor of the bottom meson at production is identified. The result is based on approximately 2000 Bs0J/ψϕ decays reconstructed in a 1.35  fb-1 data sample collected with the CDF II detector using pp̅ collisions produced at the Fermilab Tevatron. We report confidence regions in the two-dimensional space of 2βs and the decay-width difference ΔΓ. Assuming the standard model predictions of 2βs and ΔΓ, the probability of a deviation as large as the level of the observed data is 15%, corresponding to 1.5 Gaussian standard deviations.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.161802
DOI:
10.1103/PhysRevLett.100.161802
PACS:
13.25.Hw, 11.30.Er