CKM Constraints from B to rhorho Decays:
Winter 2004
The constraints presented on this page are obtained from the BABAR measurement of the CP asymmetries (Slong,Clong) of the longitudinal component in the B0 to rho+rho- decays.
  • Compilation of experimental inputs used for the plots below:

    • Compilation of results on B --> rhorho CP asymmetries, branching fractions and longitudinal fractions (references).
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  • In the (rhobar,etabar) plane:
    Confidence levels in the large (rhobar,etabar) plane obtained from the isospin analysis.

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  • On alpha:

    Constraint on alpha obtained from the isospin analysis. The result of the standard CKM fit (rhorho not included) is overlaid. Also shown is the present uncertainty on penguin contribution in B to rhorho decays (hatched histogram).

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    Comparison of the constraints on alpha from the pipi and the rhorho systems. BABAR and Belle average measurements of Cpipi and Spipi are used.
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    Comparison of the constraints on alpha from the pipi and the rhorho systems. BABAR asymmetry measurements only.
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  • In the (|P/T|,delta) plane:

    Constraints on the penguin-to-tree ratio P/T and the relative strong phase, when the CKM phase is constrained by means of the standard CKM fit.

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