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Measurement of Polarization and Search for CP Violation in Bs0→ϕϕ Decays

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.; Bauer, Gerry P; Makhoul, Khaldoun
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Abstract
We present the first measurement of polarization and CP-violating asymmetries in a B[subscript s][superscript 0] decay into two light vector mesons, B[subscript s][superscript 0]→ϕϕ, and an improved determination of its branching ratio using 295 decays reconstructed in a data sample corresponding to 2.9  fb[superscript -1] of integrated luminosity collected by the CDF experiment at the Fermilab Tevatron collider. The fraction of longitudinal polarization is determined to be f[subscript L]=0.348±0.041(stat)±0.021(syst), and the branching ratio B(B[subscript s][superscript 0]→ϕϕ)=[2.32±0.18(stat)±0.82(syst)]×10[superscript -5]. Asymmetries of decay angle distributions sensitive to CP violation are measured to be A[subscript u]=-0.007±0.064(stat)±0.018(syst) and A[subscript v]=-0.120±0.064(stat)±0.016(syst).
Date issued
2011-12
URI
http://hdl.handle.net/1721.1/69192
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Aaltonen, T. et al. “Measurement of Polarization and Search for CP Violation in B_{s}^{0}→ϕϕ Decays.” Physical Review Letters 107.26 (2011): n. pag. Web. 24 Feb. 2012. © 2011 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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