Measurement of indirect CP asymmetries in D[superscript 0] → K[superscript −] K[superscript +] and D[superscript 0] → π[superscript −] π[superscript +] decays using semileptonic B decays
Time-dependent CP asymmetries in the decay rates of the singly Cabibbo-suppressed decays D[superscript 0] → K[superscript −] K[superscript +] and D[superscript 0] → π[superscript −] π[superscript +] are measured in pp collision data corresponding to an integrated luminosity of 3.0 fb[superscript −1]...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Springer-Verlag
2015
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| Online Access: | http://hdl.handle.net/1721.1/97161 https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 |
| Summary: | Time-dependent CP asymmetries in the decay rates of the singly Cabibbo-suppressed decays D[superscript 0] → K[superscript −] K[superscript +] and D[superscript 0] → π[superscript −] π[superscript +] are measured in pp collision data corresponding to an integrated luminosity of 3.0 fb[superscript −1] collected by the LHCb experiment. The D[superscript 0] mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial state as D[superscript 0] or [bar over D][superscript 0]. The asymmetries in effective lifetimes between D[superscript 0] and [bar over D][superscript 0] decays, which are sensitive to indirect CP violation, are determined to be
A[subscript Γ](K[superscript −]K[superscript +]) = (−0.134 ± 0.077[−0.026 over −0.034])%, A[subscript Γ](π[superscript −]π[superscript +]) = (−0.092 ± 0.145[−0.025 over −0.033])%,
where the first uncertainties are statistical and the second systematic. This result is in agreement with previous measurements and with the hypothesis of no indirect CP violation in D[superscript 0] decays. |
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