Measurement of CP asymmetries in the decays B-0 -> K-*0 mu(+) mu(-) and B+ -> K+ mu(+) mu(-)
The direct CP asymmetries of the decays B0 → K∗0µ +µ − and B+ → K+µ +µ − are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector. The respective control modes B0 → J/ψK∗0 and B+ → J/ψK+ are used to account for detection and producti...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/185622 |
| Acceso en línea: | https://hdl.handle.net/2445/185622 |
| Access Level: | acceso abierto |
| Palabra clave: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
| Sumario: | The direct CP asymmetries of the decays B0 → K∗0µ +µ − and B+ → K+µ +µ − are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector. The respective control modes B0 → J/ψK∗0 and B+ → J/ψK+ are used to account for detection and production asymmetries. The measurements are made in several intervals of µ +µ − invariant mass squared, with the φ(1020) and charmonium resonance regions excluded. Under the hypothesis of zero CP asymmetry in the control modes, the average values of the asymmetries are ACP (B 0 → K∗0µ +µ −) = −0.035 ± 0.024 ± 0.003, ACP (B + → K+µ +µ −) = 0.012 ± 0.017 ± 0.001, where the first uncertainties are statistical and the second are due to systematic effects. Both measurements are consistent with the Standard Model prediction of small CP asymmetry in these decay |
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