First flavor-tagged determination of bounds on mixing-induced CP violation in Bs0→J/ψ decays

First flavor-tagged determination of bounds on mixing-induced CP violation in Bs0→J/ψ decays

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 Bs0→J/ψ decays reconstructed in a 1.35fb-1 data sample collected with the CDF II d...

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书目详细资料
Main Authors: Aaltonen, T, Adelman, J, Akimoto, T, Albrow, MG, Álvarez González, B, Amerio, S, Amidei, D, Anastassov, A, Annovi, A, Antos, J, Aoki, M, Apollinari, G, Apresyan, A, Arisawa, T, Artikov, A, Ashmanskas, W, Attal, A, Aurisano, A, Azfar, F, Azzi-Bacchetta, P, Azzurri, P, Bacchetta, N, Badgett, W, Barbaro-Galtieri, A, Barnes, V
格式: Journal article
语言:English
出版: 2008
实物特征
总结: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 Bs0→J/ψ decays reconstructed in a 1.35fb-1 data sample collected with the CDF II detector using pp̄ 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.

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