Direct and mixing-induced CP-violating asymmetries in B0 s → K+K- decays are measured for the first time using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb-1, collected with the LHCb detector at a centre-of-mass energy of 7TeV. The results are CKK = 0.14 ± 0.11 ± 0.03 and SKK = 0.30 ± 0.12 ± 0.04, where the first uncertainties are statistical and the second systematic. The corresponding quantities are also determined for B0→π +π- decays to be Cππ = -0.38±0.15±0.02 and Sππ = -0.71±0. 13±0.02, in good agreement with existing measurements.

Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., et al. (2013). First measurement of time-dependent CP violation in B0 → K+K- decays. JOURNAL OF HIGH ENERGY PHYSICS, 2013(10) [10.1007/JHEP10(2013)183].

First measurement of time-dependent CP violation in B0 → K+K- decays

CALVI, MARTA;GOTTI, CLAUDIO;Martinelli, M;
2013

Abstract

Direct and mixing-induced CP-violating asymmetries in B0 s → K+K- decays are measured for the first time using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb-1, collected with the LHCb detector at a centre-of-mass energy of 7TeV. The results are CKK = 0.14 ± 0.11 ± 0.03 and SKK = 0.30 ± 0.12 ± 0.04, where the first uncertainties are statistical and the second systematic. The corresponding quantities are also determined for B0→π +π- decays to be Cππ = -0.38±0.15±0.02 and Sππ = -0.71±0. 13±0.02, in good agreement with existing measurements.
Articolo in rivista - Articolo scientifico
B physics; CKM angle gamma; CP violation; Flavor physics; Hadron-Hadron Scattering; Nuclear and High Energy Physics
English
2013
2013
10
183
none
Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., et al. (2013). First measurement of time-dependent CP violation in B0 → K+K- decays. JOURNAL OF HIGH ENERGY PHYSICS, 2013(10) [10.1007/JHEP10(2013)183].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/66585
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