Evidence for $B^0 \to \rho^0 \rho^0$ decay and implications for the CKM angle $\alpha$ - INSPIRE

DataBETA

Evidence for $B^0 \to \rho^0 \rho^0$ decay and implications for the CKM angle $\alpha$

BaBar

Collaboration

Dec, 2006

7 pages

Published in:

Phys.Rev.Lett. 98 (2007) 111801

e-Print:

hep-ex/0612021 [hep-ex]

DOI:

10.1103/PhysRevLett.98.111801

PDG:

{{\mathit B}^{0}}

\rightarrow

{{\mathit \rho}^{0}}{{\mathit \rho}^{0}}

Report number:

SLAC-PUB-12259,
BABAR-PUB-06-072

Experiments:

SLAC-PEP2-BABAR

View in:

reference search33 citations

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Abstract:

We search for the decays B0->rho0rho0, B0->rho0f0, and B0->f0f0 in a sample of about 384 million Upsilon(4S)->BBbar decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We find evidence for B0->rho0rho0 with 3.5 sigma significance and measure the branching fraction BR = (1.07+-0.33+-0.19)10^-6 and longitudinal polarization fraction f_L = 0.87+-0.13+-0.04, where the first uncertainty is statistical, and the second is systematic. The uncertainty on the CKM unitarity angle alpha due to penguin contributions in B-> rho rho decays is 18 degrees at the 1 sigma level. We also set upper limits on the B0->rho0f0 and B0->f0f0 decay rates.

Note:

7 pages, 2 postscript figues, accepted to PRL

11.30.Er
12.15.Hh
13.25.Hw
electron positron: colliding beams
electron positron: annihilation
Upsilon(10570): electroproduction
B: pair production
B0: hadronic decay
meson: pair production
final state: (0charm)

References(18)

Figures(0)

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