Decays of B0s and anti-B0s mesons into J/ψ π+ π− final states are studied in a data sample corresponding to 1.9 fb^−1 of integrated luminosity collected with the LHCb detector in 13 TeV pp collisions. A time-dependent amplitude analysis is used to determine the final-state resonance contributions, the CP-violating phase φ_s = −0.057 ± 0.060 ± 0.011 rad, the decay-width difference between the heavier mass B0s eigenstate and the B0 meson of −0.050 ± 0.004 ± 0.004 ps^−1, and the CP-violating parameter |λ| = 1.01{−0.06}{+0.08} ± 0.03, where the first uncertainty is statistical and the second systematic. These results are combined with previous LHCb measurements in the same decay channel using 7 TeV and 8 TeV pp collisions obtaining φ_s = 0.002 ± 0.044 ± 0.012 rad, and |λ| = 0.949 ± 0.036 ± 0.019.

Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). Measurement of the CP-Violating Phase ϕ_s from B0s → J/ψ π+ π− Decays in 13 TeV pp Collisions. PHYSICS LETTERS. SECTION B, 797, 1-12 [10.1016/j.physletb.2019.07.036].

Measurement of the CP-Violating Phase ϕ_s from B0s → J/ψ π+ π− Decays in 13 TeV pp Collisions

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.
2019

Abstract

Decays of B0s and anti-B0s mesons into J/ψ π+ π− final states are studied in a data sample corresponding to 1.9 fb^−1 of integrated luminosity collected with the LHCb detector in 13 TeV pp collisions. A time-dependent amplitude analysis is used to determine the final-state resonance contributions, the CP-violating phase φ_s = −0.057 ± 0.060 ± 0.011 rad, the decay-width difference between the heavier mass B0s eigenstate and the B0 meson of −0.050 ± 0.004 ± 0.004 ps^−1, and the CP-violating parameter |λ| = 1.01{−0.06}{+0.08} ± 0.03, where the first uncertainty is statistical and the second systematic. These results are combined with previous LHCb measurements in the same decay channel using 7 TeV and 8 TeV pp collisions obtaining φ_s = 0.002 ± 0.044 ± 0.012 rad, and |λ| = 0.949 ± 0.036 ± 0.019.
2019
Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). Measurement of the CP-Violating Phase ϕ_s from B0s → J/ψ π+ π− Decays in 13 TeV pp Collisions. PHYSICS LETTERS. SECTION B, 797, 1-12 [10.1016/j.physletb.2019.07.036].
Aaij, R.; Abellán Beteta, C.; Adeva, B.; Adinolfi, M.; Aidala, C.A.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/701161
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