TY - JOUR
T1 - Observation of the W -Annihilation Process Ds+ →ωρ+ and Measurement of Ds+ →φρ+ in Ds+ →π+π+π-π0π0 Decays
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Adlarson, P.
AU - Afedulidis, O.
AU - Kabana, S.
AU - The BESIII collaboration
N1 - Publisher Copyright:
© 2025 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
PY - 2025/5/23
Y1 - 2025/5/23
N2 - We present the first amplitude analysis and branching fraction measurement of the decay Ds+→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 Ds+→ωρ+ with a branching fraction of (0.99±0.08stat -0.07+0.05syst)%. In comparison to the low significance of the D wave in the decay Ds+→φρ+, the dominance of the D wave over the S and P waves, with a fraction of (51.85±7.28stat -7.90+4.83syst)% observed in the decay Ds+→ωρ+, provides crucial information for the "polarization puzzle,"as well as for the understanding of charm meson decays. The branching fraction of Ds+→π+π+π-π0π0 is measured to be (4.41±0.15stat±0.13syst)%. Moreover, the branching fraction of Ds+→φρ+ is measured to be (3.98±0.33stat -0.19+0.21syst)%, 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.
AB - We present the first amplitude analysis and branching fraction measurement of the decay Ds+→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 Ds+→ωρ+ with a branching fraction of (0.99±0.08stat -0.07+0.05syst)%. In comparison to the low significance of the D wave in the decay Ds+→φρ+, the dominance of the D wave over the S and P waves, with a fraction of (51.85±7.28stat -7.90+4.83syst)% observed in the decay Ds+→ωρ+, provides crucial information for the "polarization puzzle,"as well as for the understanding of charm meson decays. The branching fraction of Ds+→π+π+π-π0π0 is measured to be (4.41±0.15stat±0.13syst)%. Moreover, the branching fraction of Ds+→φρ+ is measured to be (3.98±0.33stat -0.19+0.21syst)%, 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.
UR - https://www.scopus.com/pages/publications/105006763871
U2 - 10.1103/PhysRevLett.134.201902
DO - 10.1103/PhysRevLett.134.201902
M3 - Article
C2 - 40479670
AN - SCOPUS:105006763871
SN - 0031-9007
VL - 134
JO - Physical Review Letters
JF - Physical Review Letters
IS - 20
M1 - 201902
ER -