We present the first amplitude analysis and branching fraction measurement of the decay 𝐷+ 𝑠 →𝜋+𝜋+𝜋−𝜋0𝜋0, using 𝑒+𝑒− collision data collected with the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV corresponding to an integrated luminosity of 7.33 fb−1, and report the first observation of the pure 𝑊-annihilation decay 𝐷+ 𝑠 →𝜔𝜌+ with a branching fraction of (0.99±0.08stat +0.05 −0.07syst)%. In comparison to the low significance of the 𝒟 wave in the decay 𝐷+ 𝑠 →𝜙𝜌+, the dominance of the 𝒟 wave over the 𝒮 and 𝒫 waves, with a fraction of (51.85±7.28stat +4.83 −7.90syst)% observed in the decay 𝐷+ 𝑠 →𝜔𝜌+, provides crucial information for the “polarization puzzle,” as well as for the understanding of charm meson decays. The branching fraction of 𝐷+ 𝑠 →𝜋+𝜋+𝜋−𝜋0𝜋0 is measured to be (4.41±0.15stat±0.13syst)%. Moreover, the branching fraction of 𝐷+ 𝑠 →𝜙𝜌+ is measured to be (3.98±0.33stat +0.21 −0.19syst)%, and the 𝑅𝜙 =ℬ(𝜙→𝜋+𝜋−𝜋0)/ℬ(𝜙→𝐾+𝐾−) is determined to be (0.222±0.019stat +0.016 −0.016syst), which is consistent with the previous measurement based on charm meson decays, but deviates from the results from 𝑒+𝑒− annihilation and 𝐾 −𝑁 scattering experiments by more than 3𝜎.
Observation of the W -Annihilation Process Ds+ → ωρ + and Measurement of Ds+ →φρ+ in Ds+ →π+π+π−π0π0 Decays
Amoroso, A.;Bianchi, F.;Bortone, A.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2025-01-01
Abstract
We present the first amplitude analysis and branching fraction measurement of the decay 𝐷+ 𝑠 →𝜋+𝜋+𝜋−𝜋0𝜋0, using 𝑒+𝑒− collision data collected with the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV corresponding to an integrated luminosity of 7.33 fb−1, and report the first observation of the pure 𝑊-annihilation decay 𝐷+ 𝑠 →𝜔𝜌+ with a branching fraction of (0.99±0.08stat +0.05 −0.07syst)%. In comparison to the low significance of the 𝒟 wave in the decay 𝐷+ 𝑠 →𝜙𝜌+, the dominance of the 𝒟 wave over the 𝒮 and 𝒫 waves, with a fraction of (51.85±7.28stat +4.83 −7.90syst)% observed in the decay 𝐷+ 𝑠 →𝜔𝜌+, provides crucial information for the “polarization puzzle,” as well as for the understanding of charm meson decays. The branching fraction of 𝐷+ 𝑠 →𝜋+𝜋+𝜋−𝜋0𝜋0 is measured to be (4.41±0.15stat±0.13syst)%. Moreover, the branching fraction of 𝐷+ 𝑠 →𝜙𝜌+ is measured to be (3.98±0.33stat +0.21 −0.19syst)%, and the 𝑅𝜙 =ℬ(𝜙→𝜋+𝜋−𝜋0)/ℬ(𝜙→𝐾+𝐾−) is determined to be (0.222±0.019stat +0.016 −0.016syst), which is consistent with the previous measurement based on charm meson decays, but deviates from the results from 𝑒+𝑒− annihilation and 𝐾 −𝑁 scattering experiments by more than 3𝜎.| File | Dimensione | Formato | |
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PhysRevLett.134.201902.pdf
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