The CP asymmetry in the mixing of B0s and antiB0s mesons is measured in proton-proton collision data corresponding to an integrated luminosity of 3.0 fb^−1, recorded by the LHCb experiment at center-of-mass energies of 7 and 8 TeV. Semileptonic B0s and antiB0s decays are studied in the inclusive mode Ds∓ μ± ν(−)μ X with the Ds∓ mesons reconstructed in the K+ K− π∓ final state. Correcting the observed charge asymmetry for detection and background effects, the CP asymmetry is found to be a_sl^s = (0.39 ± 0.26 ± 0.20)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of a_sl^s to date. It is consistent with the prediction from the standard model and will constrain new models of particle physics.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2016). Measurement of the CP Asymmetry in B0s−antiB0s Mixing. PHYSICAL REVIEW LETTERS, 117(6), 1-9 [10.1103/PhysRevLett.117.061803].

Measurement of the CP Asymmetry in B0s−antiB0s Mixing

Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;ZUCCHELLI, STEFANO
2016

Abstract

The CP asymmetry in the mixing of B0s and antiB0s mesons is measured in proton-proton collision data corresponding to an integrated luminosity of 3.0 fb^−1, recorded by the LHCb experiment at center-of-mass energies of 7 and 8 TeV. Semileptonic B0s and antiB0s decays are studied in the inclusive mode Ds∓ μ± ν(−)μ X with the Ds∓ mesons reconstructed in the K+ K− π∓ final state. Correcting the observed charge asymmetry for detection and background effects, the CP asymmetry is found to be a_sl^s = (0.39 ± 0.26 ± 0.20)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of a_sl^s to date. It is consistent with the prediction from the standard model and will constrain new models of particle physics.
2016
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2016). Measurement of the CP Asymmetry in B0s−antiB0s Mixing. PHYSICAL REVIEW LETTERS, 117(6), 1-9 [10.1103/PhysRevLett.117.061803].
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alv...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/560172
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