An amplitude analysis of B0 → (π+ π−) (K+ π−) decays is performed in the two-body invariant mass regions 300 < m(π+ π−) < 1100 MeV/c2, accounting for the ρ0, ω, f0(500), f0(980) and f0(1370) resonances, and 750 < m(K+ π−) < 1200 MeV/c2, which is dominated by the K*(892)0 meson. The analysis uses 3 fb^−1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The CP averages and asymmetries are measured for the magnitudes and phase differences of the contributing amplitudes. The CP-averaged longitudinal polarisation fractions of the vector-vector modes are found to be tilde-f_ρK*^0 = 0.164 ± 0.015 ± 0.022 and tilde-f_ωK∗^0 = 0.68 ± 0.17 ± 0.16, and their CP asymmetries, A_ρK∗^0 = −0.62 ± 0.09 ± 0.09 and A_ωK∗^0 = −0.13 ± 0.27 ± 0.13, where the first uncertainty is statistical and the second systematic.

Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). Study of the B0 → ρ(770)0 K*(892)0 Decay with an Amplitude Analysis of B0 → (π+ π−) (K+ π−) Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2019(5), 0-30 [10.1007/JHEP05(2019)026].

Study of the B0 → ρ(770)0 K*(892)0 Decay with an Amplitude Analysis of B0 → (π+ π−) (K+ π−) Decays

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

Abstract

An amplitude analysis of B0 → (π+ π−) (K+ π−) decays is performed in the two-body invariant mass regions 300 < m(π+ π−) < 1100 MeV/c2, accounting for the ρ0, ω, f0(500), f0(980) and f0(1370) resonances, and 750 < m(K+ π−) < 1200 MeV/c2, which is dominated by the K*(892)0 meson. The analysis uses 3 fb^−1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The CP averages and asymmetries are measured for the magnitudes and phase differences of the contributing amplitudes. The CP-averaged longitudinal polarisation fractions of the vector-vector modes are found to be tilde-f_ρK*^0 = 0.164 ± 0.015 ± 0.022 and tilde-f_ωK∗^0 = 0.68 ± 0.17 ± 0.16, and their CP asymmetries, A_ρK∗^0 = −0.62 ± 0.09 ± 0.09 and A_ωK∗^0 = −0.13 ± 0.27 ± 0.13, where the first uncertainty is statistical and the second systematic.
2019
Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). Study of the B0 → ρ(770)0 K*(892)0 Decay with an Amplitude Analysis of B0 → (π+ π−) (K+ π−) Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2019(5), 0-30 [10.1007/JHEP05(2019)026].
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/11585/688220
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