Study of the B 0 → ρ(770)°K * (892) 0 decay with an amplitude analysis of B 0 → (π + π )(K + π ) decays

The Lhcb Collaboration

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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 f˜ρK*0 = 0.164 ± 0.015 ± 0.022 and f˜ωK*0 = 0.68 ± 0.17 ± 0.16, and their CP asymmetries, AρK*0 = −0.62 ± 0.09 ± 0.09 and AωK*0 = −0.13 ± 0.27 ± 0.13, where the first uncertainty is statistical and the second systematic.[Figure not available: see fulltext.].

Original languageEnglish (US)
Article number26
JournalJournal of High Energy Physics
Volume2019
Issue number5
DOIs
StatePublished - May 1 2019

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Keywords

  • B physics
  • CP violation
  • Hadron-Hadron scattering (experiments)
  • Polarization

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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