Time-integrated and time-dependent angular analyses of B -> J/psi K pi: A measurement of cos2 beta with no sign ambiguity from strong phases
BaBar Collaboration (Including: UNSPECIFIED). (2005) Time-integrated and time-dependent angular analyses of B -> J/psi K pi: A measurement of cos2 beta with no sign ambiguity from strong phases. PHYSICAL REVIEW D, 71 (3). -. ISSN 0556-2821Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevD.71.032005
We present results on B-->J/psiKpi decays using e(+)e(-)annihilation data collected with the BABAR detector at the Y(4S) resonance. The detector is located at the PEP-II asymmetric-energy storage ring facility at the Stanford Linear Accelerator Center. Using approximately 88x10(6) B (B) over bar pairs, we measure the decay amplitudes for the flavor eigenmodes and observe strong-phase differences indicative of final-state interactions with a significance of 7.6 standard deviations. We use the interference between the Kpi S-wave and P-wave amplitudes in the region of the K-*(892) to resolve the ambiguity in the determination of these strong phases. We then perform an ambiguity-free measurement of cos2beta using the angular and time-dependent asymmetry in B-->J/psiK(*0)(K(S)(0)pi(0)) decays. With sin2beta fixed at its measured value and cos2beta treated as an independent parameter, we find cos2beta=2.72(-0.79)(+0.50)(stat)+/-0.27(syst), determining the sign of cos2beta to be positive at 86% C.L.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy
Q Science > QC Physics
|Journal or Publication Title:||PHYSICAL REVIEW D|
|Publisher:||AMERICAN PHYSICAL SOC|
|Official Date:||February 2005|
|Number of Pages:||30|
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