Observation of the decay B0 → ρ+ ρ- and measurement of the branching fraction and polarization

BABAR Collaboration

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41 Scopus citations


We have observed the rare decay B0 → ρ+ ρ- in a sample of 89 million BB̄ pairs recorded with the BABAR detector. The number of observed events is 88-21 +23±9 with a significance of 5.1 standard deviations with systematic uncertainties included. The branching fraction and the longitudinal polarization are measured to be β(B0 → ρ+ ρ-) = (25-6-6 +7+5× 10-6 and ΓLΓ = 0.98-0.08 +0.02±0. 03, respectively.

Original languageEnglish (US)
Article number031102
JournalPhysical Review D
Issue number3
StatePublished - 2004
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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