Study of the B<SUP>0</SUP> (770)°K<SUP>*</SUP>(892)<SUP>0</SUP> decay with an amplitude analysis of B<SUP>0</SUP> (<SUP>+-</SUP>)(K<SUP>+</SUP>π<SUP>-</SUP>) decays



Aaij, R, Beteta, C Abellan, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F
et al (show 834 more authors) (2019) Study of the B<SUP>0</SUP> (770)°K<SUP>*</SUP>(892)<SUP>0</SUP> decay with an amplitude analysis of B<SUP>0</SUP> (<SUP>+-</SUP>)(K<SUP>+</SUP>π<SUP>-</SUP>) decays. JOURNAL OF HIGH ENERGY PHYSICS, 05 (5). 026-.

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Abstract

An amplitude analysis of ${B^0\to (\pi^+\pi^-) (K^+\pi^-)}$ decays is performed in the two-body invariant mass regions ${300 < m(\pi^+\pi^-)<1100}$ MeV/$c^2$, accounting for the $\rho^0$, $\omega$, $f_0(500)$, $f_0(980)$ and $f_0(1370)$ resonances, and ${750 < m(K^+\pi^-)<1200}$ MeV/$c^2$, 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 $\tilde{f}^0_{\rho K^{*}} = 0.164 \pm 0.015 \pm 0.022$ and $\tilde{f}^0_{\omega K^{*}} = 0.68 \pm 0.17 \pm 0.16$, and their $CP$ asymmetries, $\mathcal{A}^0_{\rho K^{*}} = -0.62 \pm 0.09 \pm 0.09$ and $\mathcal{A}^0_{\omega K^{*}} = -0.13 \pm 0.27 \pm 0.13$, where the first uncertainty is statistical and the second systematic.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-042.html (LHCb public pages)
Uncontrolled Keywords: B physics, CP violation, Hadron-Hadron scattering (experiments), Polarization
Depositing User: Symplectic Admin
Date Deposited: 23 Jan 2020 11:47
Last Modified: 07 Oct 2023 05:42
DOI: 10.1007/JHEP05(2019)026
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3071715