Study of the B0 → ρ(770)°K*(892)0 decay with an amplitude analysis of B0 → (π+π−)(K+π−) decays
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13130_2019_Article_10487.pdf
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Author(s)
Aaij, R.
Abellán Beteta, C.
Adeva, B.
Adinolfi, M.
Aidala, C. A
Ajaltouni, Z.
Akar, S.
Albicocco, P.
Albrecht, J.
Alessio, F.
Date Issued
May 6, 2019
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2019 May 06;2019(5):26
Version
Final published version
Abstract
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 con- tributing amplitudes. The CP-averaged longitudinal polarisation fractions of the vector-vector modes are found to be
f
˜
ρ
K
*
0
$$ {\tilde{f}}_{\rho {K}^{*}}^0 $$
= 0.164 ± 0.015 ± 0.022 and
f
˜
ω
K
*
0
$$ {\tilde{f}}_{\omega {K}^{*}}^0 $$
= 0.68 ± 0.17 ± 0.16, and their CP asymmetries,
A
ρ
K
*
0
$$ {\mathcal{A}}_{\rho {K}^{*}}^0 $$
= −0.62 ± 0.09 ± 0.09 and
A
ω
K
*
0
$$ {\mathcal{A}}_{\omega {K}^{*}}^0 $$
= −0.13 ± 0.27 ± 0.13, where the first uncertainty is statistical and the second systematic.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/JHEP05(2019)026
