Measurement of polarization amplitudes and CP asymmetries in $B^0 \to φK^*(892)^0$

Journal article

An angular analysis of the decay $B^0 \to \phi K^*(892)^0$ 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 $K^+ \pi^-$ and $K^+K^-$ contributions are taken into account and found to be significant. A comparison of the $B^0 \to \phi K^*(892)^0$ and $\bar{B}^0 \to \phi \bar{K}^*(892)^0$ results shows no evidence for direct CP violation in the rate asymmetry, in the triple-product asymmetries or in the polarization amplitudes and phases.

Authors: collaboration, L; Aaij, R; Abba, A; Adeva, B; Adinolfi, M

• Publication status: Published
• Journal: JHEP
• Volume: 1405
• Issue: 5
• Pages: 069
• Publication date: 2014-03-12
• DOI: 10.1007/JHEP05(2014)069
• EISSN: 1029-8479
• ISSN: 1029-8479
• Keywords: hep-ex