@article{ae6f5afacad84756bdaaa4bef41fa312,
title = "Observation of the decay B0 → ρ+ ρ- and measurement of the branching fraction and polarization",
abstract = "We have observed the rare decay B0 → ρ+ ρ- in a sample of 89 million B{\=B} 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.",
author = "\{BABAR Collaboration\} and B. Aubert and R. Barate and D. Boutigny and F. Couderc and Gaillard, \{J. M.\} and A. Hicheur and Y. Karyotakis and Lees, \{J. P.\} and V. Tisserand and A. Zghiche and A. Palano and A. Pompili and Chen, \{J. C.\} and Qi, \{N. D.\} and G. Rong and P. Wang and Zhu, \{Y. S.\} and G. Eigen and I. Ofte and B. Stugu and Abrams, \{G. S.\} and Borgland, \{A. W.\} and Breon, \{A. B.\} and Brown, \{D. N.\} and J. Button-Shafer and Cahn, \{R. N.\} and E. Charles and Day, \{C. T.\} and Gill, \{M. S.\} and Gritsan, \{A. V.\} and Y. Groysman and Jacobsen, \{R. G.\} and Kadel, \{R. W.\} and J. Kadyk and Kerth, \{L. T.\} and Kolomensky, \{Yu G.\} and G. Kukartsev and C. Leclerc and Levi, \{M. E.\} and G. Lynch and Mir, \{L. M.\} and Oddone, \{P. J.\} and Orimoto, \{T. J.\} and M. Pripstein and Roe, \{N. A.\} and Ronan, \{M. T.\} and Shelkov, \{V. G.\} and Lange, \{D. J.\} and P. Elmer and J. Olsen",
year = "2004",
doi = "10.1103/PhysRevD.69.031102",
language = "English (US)",
volume = "69",
journal = "Physical Review D",
issn = "0556-2821",
publisher = "American Physical Society",
number = "3",
}