Measurement of CP asymmetry in D0→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 productio...
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
3 February 2017
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| In: |
Physics letters
Year: 2017, Jahrgang: 767, Pages: 177-187 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2017.01.061 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1016/j.physletb.2017.01.061 Verlag, kostenfrei, Volltext: http://www.sciencedirect.com/science/article/pii/S0370269317300795 
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| Verfasserangaben: | the LHCb Collaboration |
MARC
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| 245 | 1 | 0 | |a Measurement of CP asymmetry in D0→K−K+ decays |c the LHCb Collaboration |
| 246 | 3 | 3 | |a Measurement of CP asymmetry in D 0 → K − K + decays |
| 264 | 1 | |c 3 February 2017 | |
| 300 | |a 11 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
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| 500 | |a Im Titel werden die Zeichen "0", "+" und "-" hochgestellt | ||
| 500 | |a The LHCb collaboration: R. Aaij, P. d’Argent, S. Bachmann, S. Braun, A. Comerma-Montells, M. De Cian, S. Esen, D.Gerick, E. Gersabeck, X.Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, A. Piucci, M. Stahl, S. Stemmle, U. Uwer, R. Waldi, A. Zhelezov [und weitere] | ||
| 500 | |a Gesehen am 21.10.2020 | ||
| 520 | |a 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 beACP(K−K+)=(0.14±0.15 (stat)±0.10 (syst))%. A combination of this result with previous LHCb measurements yieldsACP(K−K+)=(0.04±0.12 (stat)±0.10 (syst))%,ACP(π−π+)=(0.07±0.14 (stat)±0.11 (syst))%. These are the most precise measurements from a single experiment. The result for ACP(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. | ||
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