[MRO] First Observation of CP Violation in the Decays of B[superscript 0 over s] Mesons
Using pp collision data corresponding to an integrated luminosity of 1.0 fb[superscript -1] and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in Bs0→K[superscript -]π[superscript +] decays, A[subscript CP](B[superscript 0 over s]→K[s...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2013
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| Online Access: | http://hdl.handle.net/1721.1/79909 https://orcid.org/0000-0001-8285-3346 |
| Summary: | Using pp collision data corresponding to an integrated luminosity of 1.0 fb[superscript -1] and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in Bs0→K[superscript -]π[superscript +] decays, A[subscript CP](B[superscript 0 over s]→K[superscript -]π[superscript +])=0.27±0.04 (stat)±0.01 (syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of B[superscript 0 over s] mesons. Furthermore, we provide an improved determination of direct CP violation in B[superscript 0]→K[superscript +]π[superscript -] decays, A[subscript CP](B[superscript 0]→K[superscript +]π[superscript -])=-0.080±0.007 (stat)±0.003 (syst), which is the most precise measurement of this quantity to date. |
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