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- W289784473 abstract "A B0 s meson can oscillate into its anti-particle, the $bar{B}$0 s meson, before decaying. CP violation in this system is made possible by the presence of amplitudes from both mixed and unmixed B0 s meson decays. The CP violating phase βs appears in the interference between the decay amplitudes. The quantity sin(2βs) is expected to be small in the standard model. Thus, measuring a large value for sin(2βs) would be an unequivocal sign of new physics participation in the B0 s mixing loop diagram. In this thesis, we present a latest measurement of sin(2βs), using 5.2 fb-1 of data collected at CDF from p$bar{p}$ collisions at a center of mass energy of √s=1.96 TeV. A time-dependent angular analysis, with the production flavor of the B0 s meson identified with flavor tagging methods, is used to extract sin(2βs) from ~6500 B0 s→ J/ψφ decays. Other parameters of interest, such as the B0 s lifetime and the decay width difference between the heavy and light B0 s mass eigenstates are determined to high precision. Also, the effect of potential contributions to the final state from B0 s → J/ψf0 and B0 s→ J/ψK+K- decays is considered for the first time. We present 68% and 95% confidence regions in the βs plane. The probability that the observed central value is a fluctuation of the data from the standard model expected value of βs is calculated to be 44%. The observed confidence region shows better agreement with the standard model prediction than previous measurements." @default.
- W289784473 created "2016-06-24" @default.
- W289784473 creator A5036013971 @default.
- W289784473 date "2010-05-01" @default.
- W289784473 modified "2023-09-25" @default.
- W289784473 title "Measurement of the CP Violating Phase $boldsymbol{sin(2beta_{s})}$ using $boldsymbol{B^{0}_{s}rightarrow J/psiphi}$ Decays at CDF" @default.
- W289784473 doi "https://doi.org/10.2172/1024914" @default.
- W289784473 hasPublicationYear "2010" @default.
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