The semileptonic CP asymmetry in B0-B¯0 mixing, asld, is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0fb-1, recorded by the LHCb experiment. Semileptonic B0 decays are reconstructed in the inclusive final states D-μ+ and D∗-μ+, where the D- meson decays into the K+π-π- final state and the D∗- meson into the D¯0(→K+π-)π- final state. The asymmetry between the numbers of D(∗)-μ+ and D(∗)+μ- decays is measured as a function of the decay time of the B0 mesons. The CP asymmetry is measured to be asld=(-0.02±0.19±0.30)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of asld to date and is consistent with the prediction from the standard model.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Measurement of the semileptonic CP asymmetry in B0 - B ¯ 0 mixing. PHYSICAL REVIEW LETTERS, 114(4) [10.1103/PhysRevLett.114.041601].

Measurement of the semileptonic CP asymmetry in B0 - B ¯ 0 mixing

Borsato, M;CALVI, MARTA;CASSINA, LORENZO;GOTTI, CLAUDIO;KHANJI, BASEM;Martinelli, M;
2015

Abstract

The semileptonic CP asymmetry in B0-B¯0 mixing, asld, is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0fb-1, recorded by the LHCb experiment. Semileptonic B0 decays are reconstructed in the inclusive final states D-μ+ and D∗-μ+, where the D- meson decays into the K+π-π- final state and the D∗- meson into the D¯0(→K+π-)π- final state. The asymmetry between the numbers of D(∗)-μ+ and D(∗)+μ- decays is measured as a function of the decay time of the B0 mesons. The CP asymmetry is measured to be asld=(-0.02±0.19±0.30)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of asld to date and is consistent with the prediction from the standard model.
Articolo in rivista - Articolo scientifico
Flavour Physics, LHC collider, CP violation
English
2015
114
4
041601
none
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Measurement of the semileptonic CP asymmetry in B0 - B ¯ 0 mixing. PHYSICAL REVIEW LETTERS, 114(4) [10.1103/PhysRevLett.114.041601].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/96734
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