Measurement of CP asymmetry in D 0 → K − K + decays
A measurement of the time-integrated CP asymmetry in the Cabibbo-suppressed decay D0 → K−K+ is performed using pp collision data, corresponding to an integrated luminosity of 3 fb^−1 , collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The flavour of the charm meson at produ...
| Príomhchruthaitheoirí: | , , , , , , , , , , , , , , , , , |
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| Formáid: | Journal article |
| Foilsithe / Cruthaithe: |
Elsevier
2017
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| _version_ | 1826266540692996096 |
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| author | Aaij, R Adeva, B Adinolfi, M Evans, T Gandini, P Gruberg Cazon, B Hadavizadeh, T Harnew, N Hill, D Jalocha, P John, M Jurik, N Malde, S Nandi, A Rollings, A Topp-Joergensen, S Wilkinson, G LHCb Collaboration |
| author_facet | Aaij, R Adeva, B Adinolfi, M Evans, T Gandini, P Gruberg Cazon, B Hadavizadeh, T Harnew, N Hill, D Jalocha, P John, M Jurik, N Malde, S Nandi, A Rollings, A Topp-Joergensen, S Wilkinson, G LHCb Collaboration |
| author_sort | Aaij, R |
| collection | OXFORD |
| description | A measurement of the time-integrated CP asymmetry in the Cabibbo-suppressed decay D0 → K−K+ is performed using pp collision data, corresponding to an integrated luminosity of 3 fb^−1 , collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The flavour of the charm meson at production is determined from the charge of the pion in D*+ → D0π+ and D*− → D‾0π− decays. The time-integrated CP asymmetry ACP (K−K+) is obtained assuming negligible CP violation in charm mixing and in Cabibbo-favoured D0 → K−π+, D+ → K−π+π+ and D+ → K‾0π+ decays used as calibration channels. It is found to be A CP(K−K+) = (0.14±0.15 (stat)±0.10 (syst))%. A combination of this result with previous LHCb measurements yields A CP (K − K + )=(0.04±0.12 (stat)±0.10 (syst))%,A CP (π−π+) = (0.07±0.14 (stat)±0.11 (syst))%. These are the most precise measurements from a single experiment. The result for A CP(K−K+) is the most precise determination of a time-integrated CP asymmetry in the charm sector to date, and neither measurement shows evidence of CP asymmetry. |
| first_indexed | 2024-03-06T20:40:30Z |
| format | Journal article |
| id | oxford-uuid:341e204a-d91c-4753-9695-1a96a8b5c205 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:40:30Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:341e204a-d91c-4753-9695-1a96a8b5c2052022-03-26T13:24:10ZMeasurement of CP asymmetry in D 0 → K − K + decaysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:341e204a-d91c-4753-9695-1a96a8b5c205Symplectic Elements at OxfordElsevier2017Aaij, RAdeva, BAdinolfi, MEvans, TGandini, PGruberg Cazon, BHadavizadeh, THarnew, NHill, DJalocha, PJohn, MJurik, NMalde, SNandi, ARollings, ATopp-Joergensen, SWilkinson, GLHCb CollaborationA measurement of the time-integrated CP asymmetry in the Cabibbo-suppressed decay D0 → K−K+ is performed using pp collision data, corresponding to an integrated luminosity of 3 fb^−1 , collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The flavour of the charm meson at production is determined from the charge of the pion in D*+ → D0π+ and D*− → D‾0π− decays. The time-integrated CP asymmetry ACP (K−K+) is obtained assuming negligible CP violation in charm mixing and in Cabibbo-favoured D0 → K−π+, D+ → K−π+π+ and D+ → K‾0π+ decays used as calibration channels. It is found to be A CP(K−K+) = (0.14±0.15 (stat)±0.10 (syst))%. A combination of this result with previous LHCb measurements yields A CP (K − K + )=(0.04±0.12 (stat)±0.10 (syst))%,A CP (π−π+) = (0.07±0.14 (stat)±0.11 (syst))%. These are the most precise measurements from a single experiment. The result for A CP(K−K+) is the most precise determination of a time-integrated CP asymmetry in the charm sector to date, and neither measurement shows evidence of CP asymmetry. |
| spellingShingle | Aaij, R Adeva, B Adinolfi, M Evans, T Gandini, P Gruberg Cazon, B Hadavizadeh, T Harnew, N Hill, D Jalocha, P John, M Jurik, N Malde, S Nandi, A Rollings, A Topp-Joergensen, S Wilkinson, G LHCb Collaboration Measurement of CP asymmetry in D 0 → K − K + decays |
| title | Measurement of CP asymmetry in D 0 → K − K + decays |
| title_full | Measurement of CP asymmetry in D 0 → K − K + decays |
| title_fullStr | Measurement of CP asymmetry in D 0 → K − K + decays |
| title_full_unstemmed | Measurement of CP asymmetry in D 0 → K − K + decays |
| title_short | Measurement of CP asymmetry in D 0 → K − K + decays |
| title_sort | measurement of cp asymmetry in d 0 k k decays |
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