Measurement of Angular and CP Asymmetries in D
Phys Rev Lett
; 121(9): 091801, 2018 Aug 31.
Article
en En
| MEDLINE
| ID: mdl-30230851
The first measurements of the forward-backward asymmetry of the dimuon pair (A_{FB}), the triple-product asymmetry (A_{2Ï}), and the charge-parity-conjugation asymmetry (A_{CP}), in D^{0}âπ^{+}π^{-}µ^{+}µ^{-} and D^{0}âK^{+}K^{-}µ^{+}µ^{-} decays are reported. They are performed using data from proton-proton collisions collected with the LHCb experiment from 2011 to 2016, corresponding to a total integrated luminosity of 5 fb^{-1}. The asymmetries are measured to be A_{FB}(D^{0}âπ^{+}π^{-}µ^{+}µ^{-})=(3.3±3.7±0.6)%, A_{2Ï}(D^{0}âπ^{+}π^{-}µ^{+}µ^{-})=(-0.6±3.7±0.6)%, A_{CP}(D^{0}âπ^{+}π^{-}µ^{+}µ^{-})=(4.9±3.8±0.7)%, A_{FB}(D^{0}âK^{+}K^{-}µ^{+}µ^{-})=(0±11±2)%, A_{2Ï}(D^{0}âK^{+}K^{-}µ^{+}µ^{-})=(9±11±1)%, A_{CP}(D^{0}âK^{+}K^{-}µ^{+}µ^{-})=(0±11±2)%, where the first uncertainty is statistical and the second systematic. The asymmetries are also measured as a function of the dimuon invariant mass. The results are consistent with the standard model predictions.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Phys Rev Lett
Año:
2018
Tipo del documento:
Article
País de afiliación:
Países Bajos
Pais de publicación:
Estados Unidos