The ratio of branching fractions and the difference in CP asymmetries of the decays B+ → J/ψπ+ and B+ → J/ψK+ are measured using a data sample of pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 3 fb−1 at centre-of-mass energies of 7 and 8 TeV. The results are B(B+ → J/ψπ+)B(B+ → J/ψK+)= (3.83 ± 0.03 ± 0.03) × 10−2,ACP(B+ → J/ψπ+) − ACP(B+ → J/ψK+) = (1.82 ± 0.86 ± 0.14) × 10−2 , where the first uncertainties are statistical and the second are systematic. Combining this result with a recent LHCb measurement of ACP(B+ → J/ψK+) provides the most precise estimate to date of CP violation in the decay B+ → J/ψπ+,ACP(B+ → J/ψπ+) = (1.91 ± 0.89 ± 0.16) × 10−2

Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B+→ J/ψπ+and B+→ J/ψK+ / Aaij, R., Adeva, B., Adinolfi, M., 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., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2017:3(2017). [10.1007/JHEP03(2017)036]

Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B+→ J/ψπ+and B+→ J/ψK+

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2017

Abstract

The ratio of branching fractions and the difference in CP asymmetries of the decays B+ → J/ψπ+ and B+ → J/ψK+ are measured using a data sample of pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 3 fb−1 at centre-of-mass energies of 7 and 8 TeV. The results are B(B+ → J/ψπ+)B(B+ → J/ψK+)= (3.83 ± 0.03 ± 0.03) × 10−2,ACP(B+ → J/ψπ+) − ACP(B+ → J/ψK+) = (1.82 ± 0.86 ± 0.14) × 10−2 , where the first uncertainties are statistical and the second are systematic. Combining this result with a recent LHCb measurement of ACP(B+ → J/ψK+) provides the most precise estimate to date of CP violation in the decay B+ → J/ψπ+,ACP(B+ → J/ψπ+) = (1.91 ± 0.89 ± 0.16) × 10−2
2017
B physics, Branching fraction, CP violation, Hadron-Hadron scattering (experiments)
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B+→ J/ψπ+and B+→ J/ψK+ / Aaij, R., Adeva, B., Adinolfi, M., 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., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2017:3(2017). [10.1007/JHEP03(2017)036]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074518
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