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Title: | Measurement of CP observables in B 0 → DK ∗0 with D →K + K − |
Author: | Camboni, Alessandro Comerma Montells, Albert Garrido Beltrán, Lluís Graciani Díaz, Ricardo Graugés Pous, Eugeni López Asamar, Elias LHCb Collaboration |
Keywords: | Teoria quàntica de camps Relativitat (Física) Partícules (Física nuclear) Quantum field theory Relativity (Physics) Particles (Nuclear physics) |
Issue Date: | 12-Mar-2013 |
Publisher: | Springer Verlag |
Abstract: | The decay B 0 → DK *0 and the charge conjugate mode are studied using 1.0 fb−1 of pp collision data collected by the LHCb experiment at s√=7s=7 TeV in 2011. The CP asymmetry between the B 0 → DK *0 and the B⎯⎯⎯⎯0→DK⎯⎯⎯⎯∗0B¯0→DK¯∗0 decay rates, with the neutral D meson in the CP-even final state K + K −, is found to be KKd=−0.45±0.23±0.02, AdKK=−0.45±0.23±0.02, where the first uncertainty is statistical and the second is systematic. In addition, favoured B 0 → DK *0 decays are reconstructed with the D meson in the non-CP eigenstate K +π−. The ratio of the B-flavour averaged decay rates in D decays to CP and non-CP eigenstates is measured to be KKd=1.36+0.37−0.32±0.07, RdKK=1.36−0.32+0.37±0.07, where the ratio of the branching fractions of D 0 → K −π+ to D 0 → K + K − decays is included as multiplicative factor. The CP asymmetries measured with two control channels, the favoured B 0 → DK *0 decay with D → K +π− and the B⎯⎯⎯⎯0s→DK∗0B¯s0→DK∗0 decay with D→K + K −, arealsoreported. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1007/JHEP03(2013)067 |
It is part of: | Journal of High Energy Physics, 2013, vol. 3, num. 67 |
URI: | http://hdl.handle.net/2445/99264 |
Related resource: | http://dx.doi.org/10.1007/JHEP03(2013)067 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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