TY - JOUR

T1 - Observation of the 푊-Annihilation Process 퐷+ 푠→휔⁢휌+ and Measurement of 퐷+ 푠 →휙⁢휌+ in 퐷+ 푠 →휋+⁢휋+⁢휋−⁢휋0⁢휋0 Decays

AU - BESIII Collaboration

AU - Ачасов, Михаил Николаевич

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - Observation of the 𝑊-Annihilation Process 𝐷+ 𝑠→𝜔⁢𝜌+ and Measurement of 𝐷+ 𝑠 →𝜙⁢𝜌+ in 𝐷+ 𝑠 →𝜋+⁢𝜋+⁢𝜋−⁢𝜋0⁢𝜋0 Decays / The BESIII Collaboration // Physical Review Letters. – 2025. – Vol. 134, No. 20. – P. 201902. – DOI 10.1103/physrevlett.134.201902.

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/record/display.uri?eid=2-s2.0-105006763871&origin=inward&txGid=62fb98fbe71ef06e0db6413b93e64122

UR - https://www.mendeley.com/catalogue/c552b3b0-c6a9-32c7-bb4d-9e777fcb6cee/

U2 - 10.1103/PhysRevLett.134.201902

DO - 10.1103/PhysRevLett.134.201902

M3 - Article

C2 - 40479670

VL - 134

SP - 201902

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 20

ER -