PreprintCC BY 4.0arXiv17 Sep 2026

Improved amplitude analysis of η^′→π⁺π^-π⁰ and η^′→π⁰π⁰π⁰

M. Ablikim
M. N. Achasov
P. Adlarson
X. C. Ai
C. S. Akondi
R. Aliberti
A. Amoroso
Q. An
M. S. Anderson
Y. Bai
O. Bakina
H. R. Bao

766 more authors

X. L. Bao
M. Barbagiovanni
V. Batozskaya
K. Begzsuren
N. Berger
M. Berlowski
M. B. Bertani
D. Bettoni
F. Bianchi
E. Bianco
A. Bortone
I. Boyko
R. A. Briere
A. Brueggemann
D. Cabiati
H. Cai
M. H. Cai
X. Cai
A. Calcaterra
G. F. Cao
N. Cao
S. A. Cetin
X. Y. Chai
J. F. Chang
T. T. Chang
G. R. Che
Y. Z. Che
C. H. Chen
Chao Chen
G. Chen
H. S. Chen
H. Y. Chen
M. L. Chen
S. J. Chen
S. M. Chen
T. Chen
W. Chen
X. R. Chen
X. T. Chen
X. Y. Chen
Y. B. Chen
Y. Q. Chen
Z. K. Chen
J. Cheng
L. N. Cheng
S. K. Choi
X. Chu
G. Cibinetto

60 listed; 778 in total.

Abstract

Using a sample of (10087±44)× 10⁶ J/ψ events collected with the BESIII detector at BEPCII, we perform an amplitude analysis of the decays η^′→π⁺π^-π⁰ and η^′→π⁰π⁰π⁰, where we observe significant π^±π⁰ P-wave and π-π S-wave interactions. Two different parameterizations, a π-π scattering phase shift and the Gounaris-Sakurai Breit-Wigner formalism, are used to describe the P-wave propagator. Due to the large interference, the branching fractions for both the P- and the S-waves are found to be strongly model dependent.

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BibTeX RIS

BibTeX

@misc{ablikim2026improved,
  title = {{Improved amplitude analysis of $η^\prime\toπ^+π^-π^0$ and $η^\prime\toπ^0π^0π^0$}},
  author = {M. Ablikim and M. N. Achasov and P. Adlarson and X. C. Ai and C. S. Akondi and R. Aliberti and A. Amoroso and Q. An and M. S. Anderson and Y. Bai and O. Bakina and H. R. Bao and X. L. Bao and M. Barbagiovanni and V. Batozskaya and K. Begzsuren and N. Berger and M. Berlowski and M. B. Bertani and D. Bettoni and F. Bianchi and E. Bianco and A. Bortone and I. Boyko and R. A. Briere and A. Brueggemann and D. Cabiati and H. Cai and M. H. Cai and X. Cai and A. Calcaterra and G. F. Cao and N. Cao and S. A. Cetin and X. Y. Chai and J. F. Chang and T. T. Chang and G. R. Che and Y. Z. Che and C. H. Chen and Chao Chen and G. Chen and H. S. Chen and H. Y. Chen and M. L. Chen and S. J. Chen and S. M. Chen and T. Chen and W. Chen and X. R. Chen and X. T. Chen and X. Y. Chen and Y. B. Chen and Y. Q. Chen and Z. K. Chen and J. Cheng and L. N. Cheng and S. K. Choi and X. Chu and G. Cibinetto},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.15053},
  eprint = {2609.15053},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.15053},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Improved amplitude analysis of η^′→π^+π^-π^0 and η^′→π^0π^0π^0
AU  - M. Ablikim
AU  - M. N. Achasov
AU  - P. Adlarson
AU  - X. C. Ai
AU  - C. S. Akondi
AU  - R. Aliberti
AU  - A. Amoroso
AU  - Q. An
AU  - M. S. Anderson
AU  - Y. Bai
AU  - O. Bakina
AU  - H. R. Bao
AU  - X. L. Bao
AU  - M. Barbagiovanni
AU  - V. Batozskaya
AU  - K. Begzsuren
AU  - N. Berger
AU  - M. Berlowski
AU  - M. B. Bertani
AU  - D. Bettoni
AU  - F. Bianchi
AU  - E. Bianco
AU  - A. Bortone
AU  - I. Boyko
AU  - R. A. Briere
AU  - A. Brueggemann
AU  - D. Cabiati
AU  - H. Cai
AU  - M. H. Cai
AU  - X. Cai
AU  - A. Calcaterra
AU  - G. F. Cao
AU  - N. Cao
AU  - S. A. Cetin
AU  - X. Y. Chai
AU  - J. F. Chang
AU  - T. T. Chang
AU  - G. R. Che
AU  - Y. Z. Che
AU  - C. H. Chen
AU  - Chao Chen
AU  - G. Chen
AU  - H. S. Chen
AU  - H. Y. Chen
AU  - M. L. Chen
AU  - S. J. Chen
AU  - S. M. Chen
AU  - T. Chen
AU  - W. Chen
AU  - X. R. Chen
AU  - X. T. Chen
AU  - X. Y. Chen
AU  - Y. B. Chen
AU  - Y. Q. Chen
AU  - Z. K. Chen
AU  - J. Cheng
AU  - L. N. Cheng
AU  - S. K. Choi
AU  - X. Chu
AU  - G. Cibinetto
PY  - 2026
DA  - 2026/09/17
PB  - arXiv
DO  - 10.48550/arxiv.2609.15053
UR  - https://arxiv.org/abs/2609.15053
AB  - Using a sample of (10087±44)× 10^6 J/ψ events collected with the BESIII detector at BEPCII, we perform an amplitude analysis of the decays η^′→π^+π^-π^0 and η^′→π^0π^0π^0, where we observe significant π^±π^0 P-wave and π-π S-wave interactions. Two different parameterizations, a π-π scattering phase shift and the Gounaris-Sakurai Breit-Wigner formalism, are used to describe the P-wave propagator. Due to the large interference, the branching fractions for both the P- and the S-waves are found to be strongly model dependent.
ER  -

Abstract

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