The semileptonic CP asymmetry in B0-antiB0 mixing, a_sl^d, is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb^−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 antiD0 (→ 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 a_sl^d = (−0.02 ± 0.19 ± 0.30)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of a_sl^d to date and is consistent with the prediction from the standard model.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2015). Measurement of the Semileptonic CP Asymmetry in B0-antiB0 Mixing. PHYSICAL REVIEW LETTERS, 114(4), 1-9 [10.1103/PhysRevLett.114.041601].

Measurement of the Semileptonic CP Asymmetry in B0-antiB0 Mixing

CARBONE, ANGELO;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2015

Abstract

The semileptonic CP asymmetry in B0-antiB0 mixing, a_sl^d, is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb^−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 antiD0 (→ 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 a_sl^d = (−0.02 ± 0.19 ± 0.30)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of a_sl^d to date and is consistent with the prediction from the standard model.
2015
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2015). Measurement of the Semileptonic CP Asymmetry in B0-antiB0 Mixing. PHYSICAL REVIEW LETTERS, 114(4), 1-9 [10.1103/PhysRevLett.114.041601].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/425169
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