Search for CP violation in D (+/-) -> (KSK +/-)-K-0 and D-s(+/-) -> K-S(0)pi(+/-) decays
A search for CP violation in Cabibbo-suppressed D± → K0 SK± and D± s → K0 S π ± decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb−1 , recorded by the LHCb experiment. The individual CP-violating asymmetries are measured to be A D±→K0 SK± CP = (+0.03 ± 0.1...
| Autores: | , , , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | España |
| Recursos: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/185637 |
| Acesso em linha: | https://hdl.handle.net/2445/185637 |
| Access Level: | acceso abierto |
| Palavra-chave: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
| Resumo: | A search for CP violation in Cabibbo-suppressed D± → K0 SK± and D± s → K0 S π ± decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb−1 , recorded by the LHCb experiment. The individual CP-violating asymmetries are measured to be A D±→K0 SK± CP = (+0.03 ± 0.17 ± 0.14)% A D ± s →K0 S π± CP = (+0.38 ± 0.46 ± 0.17)%, assuming that CP violation in the Cabibbo-favoured decays is negligible. A combination of the measured asymmetries for the four decay modes D ± (s) → K0 SK± and D ± (s) → K0 S π ± gives the sum A D±→K0 SK± CP + A D ± s →K0 S π± CP = (+0.41 ± 0.49 ± 0.26)%. In all cases, the first uncertainties are statistical and the second systematic. The results represent the most precise measurements of these asymmetries to date and show no evidence for CP violation. Submitted to JHEP |
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