In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2019, No. 5 ( 2019-05)
Abstract:
An amplitude analysis of B 0 → ( π + π − )( K + π − ) decays is performed in the two-body invariant mass regions 300 〈 m ( π + π − ) 〈 1100 MeV/ c 2 , accounting for the ρ 0 , ω , f 0 (500), f 0 (980) and f 0 (1370) resonances, and 750 〈 m ( K + π − ) 〈 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 con- tributing amplitudes. The CP -averaged longitudinal polarisation fractions of the vector-vector modes are found to be $$ {\tilde{f}}_{\rho {K}^{*}}^0 $$ f ˜ ρ K * 0 = 0 . 164 ± 0 . 015 ± 0 . 022 and $$ {\tilde{f}}_{\omega {K}^{*}}^0 $$ f ˜ ω K * 0 = 0 . 68 ± 0 . 17 ± 0 . 16, and their CP asymmetries, $$ {\mathcal{A}}_{\rho {K}^{*}}^0 $$ A ρ K * 0 = −0 . 62 ± 0 . 09 ± 0 . 09 and $$ {\mathcal{A}}_{\omega {K}^{*}}^0 $$ A ω K * 0 = −0 . 13 ± 0 . 27 ± 0 . 13, where the first uncertainty is statistical and the second systematic.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP05(2019)026
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2019
detail.hit.zdb_id:
2027350-2
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