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First Flavor-Tagged Determination of Bounds on Mixing-Induced CP Violation in Bs0 -> J/ψϕ Decays

ContributorsCDF Collaboration
Published inPhysical review letters, vol. 100, no. 16, 161802
Publication date2008
Abstract

This Letter describes the first determination of bounds on the CP-violation parameter 2βs using B0s decays in which the flavor of the bottom meson at production is identified. The result is based on approximately 2000 B0s→J/ψϕ decays reconstructed in a 1.35  fb−1 data sample collected with the CDF II detector using pp¯ 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.

Citation (ISO format)
CDF Collaboration. First Flavor-Tagged Determination of Bounds on Mixing-Induced <em>CP</em> Violation in <em>B<sub>s</sub><sup>0</sup> -&gt; J/ψϕ</em> Decays. In: Physical review letters, 2008, vol. 100, n° 16, p. 161802. doi: 10.1103/PhysRevLett.100.161802
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ISSN of the journal0031-9007
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