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 Dâ -μ+, where the D- meson decays into the K+Ï -Ï - final state and the Dâ - meson into the D¯0(â K+Ï -)Ï - final state. The asymmetry between the numbers of D(â )-μ+ and D(â )+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.

Measurement of the semileptonic CP asymmetry in B0-antiB0 mixing / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreassen, R., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 114:4(2015), pp. 041601-041601. [10.1103/PhysRevLett.114.041601]

Measurement of the semileptonic CP asymmetry in B0-antiB0 mixing

Bizzeti, A.;
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 Dâ -μ+, where the D- meson decays into the K+Ï -Ï - final state and the Dâ - meson into the D¯0(â K+Ï -)Ï - final state. The asymmetry between the numbers of D(â )-μ+ and D(â )+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.
2015
28-gen-2015
114
4
041601
041601
Measurement of the semileptonic CP asymmetry in B0-antiB0 mixing / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreassen, R., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 114:4(2015), pp. 041601-041601. [10.1103/PhysRevLett.114.041601]
Aaij, R.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Car...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1156494
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