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Measurement of polarization amplitudes and CP asymmetries in B 0 → Φk *(892)0
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LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Craik, Daniel, Dossett, D., Gershon, T. J., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Wallace, Charlotte and Whitehead, M. (Mark)). (2014) Measurement of polarization amplitudes and CP asymmetries in B 0 → Φk *(892)0. Journal of High Energy Physics, Volume 2014 (Number 5). Article number 69. doi:10.1007/10.1007/JHEP05(2014)069 ISSN 1434-6044.
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Official URL: http://dx.doi.org/10.1007/JHEP05(2014)069
Abstract
An angular analysis of the decay B 0 → ΦK *(892)0 is reported based on a pp collision data sample, corresponding to an integrated luminosity of 1.0 fb-1, collected at a centre-of-mass energy of sqrt{s} = 7 TeV with the LHCb detector. The P-wave amplitudes and phases are measured with a greater precision than by previous experiments, and confirm about equal amounts of longitudinal and transverse polarization. The S-wave K + π - and K + K - contributions are taken into account and found to be significant. A comparison of the B 0 → ΦK *(892)0 and {overline{B}} 0}\to \phi {overline{K}} {*}}{left({892} \right)} 0} results shows no evidence for direct CP violation in the rate asymmetry, in the triple-product asymmetries or in the polarization amplitudes and phases.
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