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Measurement of the branching fraction, polarization, and CP asymmetries in B-0 ->rho(0)rho(0) decay, and implications for the CKM angle alpha

Tools

BABAR Collaboration (Including:

Aubert, B., Bona, M., Karyotakis, Y., Lees, J. P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Tico, J. Garra, Grauges, E. et al.

). (2008) Measurement of the branching fraction, polarization, and CP asymmetries in B-0 ->rho(0)rho(0) decay, and implications for the CKM angle alpha. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.78 (No.7). article no.071104 . ISSN 1550-7998

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1103/PhysRevD.78.071104

Abstract

We study B-0 ->rho(0)rho(0) decays in a sample of 465x10(6) Upsilon(4S)-> B(B)overbar events collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider located at the Stanford Linear Accelerator Center (SLAC). We measure the branching fraction B=(0.92 +/- 0.32 +/- 0.14)x10(-6) and longitudinal polarization fraction f(L)=0.75(-0.14)(+0.11)+/- 0.05, where the first uncertainty is statistical and the second is systematic. The evidence for the B-0 ->rho(0)rho(0) signal has a significance of 3.1 standard deviations, including systematic uncertainties. We investigate the proper-time dependence of the longitudinal component in the decay and measure the CP-violating coefficients S-L(00)=(0.3 +/- 0.7 +/- 0.2) and C-L(00)=(0.2 +/- 0.8 +/- 0.3). We study the implication of these results for the unitarity triangle angle alpha.

Item Type:

Journal Article

Subjects:

Q Science > QB Astronomy
Q Science > QC Physics

Divisions:

Faculty of Science > Physics

Journal or Publication Title:

Physical Review D (Particles, Fields, Gravitation and Cosmology)

Publisher:

American Physical Society

ISSN:

1550-7998