Ambiguity-Free Measurement of cos2beta: Time-Integrated and Time-Dependent Angular Analyses of B->J/Psi K pi
| dc.creator | The BABAR Collaboration | |
| dc.creator | Aubert, B. | |
| dc.date | 2004-11-02 | |
| dc.date.accessioned | 2026-07-07T11:57:58Z | |
| dc.date.available | 2026-07-07T11:57:58Z | |
| dc.description | We present results on $B\to J/ψ\xspace Kπ$ decays using $e^+e^-$ annihilation data collected with the BABAR detector at the $Υ(4S)$ resonance. The detector is located at the PEP-II asymmetric-energy storage ring facility at the Stanford Linear Accelerator Center. Using approximately 88 million $B\bar{B}$ 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 $Kπ$ $S$-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 $\cos2β$ using the angular and time-dependent asymmetry in $B\to J/ψ\xspace K^{*0}(K_S^0π^0$) dec With $\sin 2 β$ fixed at its measured value and $\cos 2 β$ treated as an in we find $\cos 2β=2.72_{-0.79}^{+0.50}\mathrm{(stat)} \pm 0.27\mathrm{(syst)}$, de sign of $\cos 2β$ to be positive at 86% CL. | |
| dc.description | 31 pages, 17 postscript figures, submitted to Phys. Rev. D | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0411016 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0411016 | |
| dc.identifier | Phys.Rev.D71:032005,2005 | |
| dc.identifier | doi:10.1103/PhysRevD.71.032005 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/206069 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Ambiguity-Free Measurement of cos2beta: Time-Integrated and Time-Dependent Angular Analyses of B->J/Psi K pi | |
| dc.type | text |