Standard

Evidence for the Cusp Effect in η' Decays into ηπ^{0}π^{0}. / The BESIII Collaboration ; Мучной, Николай Юрьевич.

в: Physical Review Letters, Том 130, № 8, 081901, 24.02.2023, стр. 081901.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

Harvard

The BESIII Collaboration & Мучной, НЮ 2023, 'Evidence for the Cusp Effect in η' Decays into ηπ^{0}π^{0}', Physical Review Letters, Том. 130, № 8, 081901, стр. 081901. https://doi.org/10.1103/PhysRevLett.130.081901

APA

The BESIII Collaboration, & Мучной, Н. Ю. (2023). Evidence for the Cusp Effect in η' Decays into ηπ^{0}π^{0}. Physical Review Letters, 130(8), 081901. [081901]. https://doi.org/10.1103/PhysRevLett.130.081901

Vancouver

The BESIII Collaboration, Мучной НЮ. Evidence for the Cusp Effect in η' Decays into ηπ^{0}π^{0}. Physical Review Letters. 2023 февр. 24;130(8):081901. 081901. doi: 10.1103/PhysRevLett.130.081901

Author

The BESIII Collaboration ; Мучной, Николай Юрьевич. / Evidence for the Cusp Effect in η' Decays into ηπ^{0}π^{0}. в: Physical Review Letters. 2023 ; Том 130, № 8. стр. 081901.

BibTeX

@article{2972233a5cf44748b5afd805d51830c4,
title = "Evidence for the Cusp Effect in η' Decays into ηπ^{0}π^{0}",
abstract = "Using a sample of 4.3×10^{5} η^{'}→ηπ^{0}π^{0} events selected from the ten billion J/ψ event dataset collected with the BESIII detector, we study the decay η^{'}→ηπ^{0}π^{0} within the framework of nonrelativistic effective field theory. Evidence for a structure at π^{+}π^{-} mass threshold is observed in the invariant mass spectrum of π^{0}π^{0} with a statistical significance of around 3.5σ, which is consistent with the cusp effect as predicted by the nonrelativistic effective field theory. After introducing the amplitude for describing the cusp effect, the ππ scattering length combination a_{0}-a_{2} is determined to be 0.226±0.060_{stat}±0.013_{syst}, which is in good agreement with theoretical calculation of 0.2644±0.0051.",
author = "{BESIII Collaboration} and M. Ablikim and Achasov, {M. N.} and Nikolaev, {I. B.} and Мучной, {Николай Юрьевич}",
note = "Evidence for the Cusp Effect in η′ Decays into ηπ0π0 / The BESIII Collaboration // Physical Review Letters. – 2023. – Vol. 130, No. 8. – P. 081901. – DOI 10.1103/physrevlett.130.081901",
year = "2023",
month = feb,
day = "24",
doi = "10.1103/PhysRevLett.130.081901",
language = "English",
volume = "130",
pages = "081901",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "8",

}

RIS

TY - JOUR

T1 - Evidence for the Cusp Effect in η' Decays into ηπ^{0}π^{0}

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Nikolaev, I. B.

AU - Мучной, Николай Юрьевич

N1 - Evidence for the Cusp Effect in η′ Decays into ηπ0π0 / The BESIII Collaboration // Physical Review Letters. – 2023. – Vol. 130, No. 8. – P. 081901. – DOI 10.1103/physrevlett.130.081901

PY - 2023/2/24

Y1 - 2023/2/24

N2 - Using a sample of 4.3×10^{5} η^{'}→ηπ^{0}π^{0} events selected from the ten billion J/ψ event dataset collected with the BESIII detector, we study the decay η^{'}→ηπ^{0}π^{0} within the framework of nonrelativistic effective field theory. Evidence for a structure at π^{+}π^{-} mass threshold is observed in the invariant mass spectrum of π^{0}π^{0} with a statistical significance of around 3.5σ, which is consistent with the cusp effect as predicted by the nonrelativistic effective field theory. After introducing the amplitude for describing the cusp effect, the ππ scattering length combination a_{0}-a_{2} is determined to be 0.226±0.060_{stat}±0.013_{syst}, which is in good agreement with theoretical calculation of 0.2644±0.0051.

AB - Using a sample of 4.3×10^{5} η^{'}→ηπ^{0}π^{0} events selected from the ten billion J/ψ event dataset collected with the BESIII detector, we study the decay η^{'}→ηπ^{0}π^{0} within the framework of nonrelativistic effective field theory. Evidence for a structure at π^{+}π^{-} mass threshold is observed in the invariant mass spectrum of π^{0}π^{0} with a statistical significance of around 3.5σ, which is consistent with the cusp effect as predicted by the nonrelativistic effective field theory. After introducing the amplitude for describing the cusp effect, the ππ scattering length combination a_{0}-a_{2} is determined to be 0.226±0.060_{stat}±0.013_{syst}, which is in good agreement with theoretical calculation of 0.2644±0.0051.

UR - https://www.mendeley.com/catalogue/40dd8683-2083-3a65-8d25-ff357194234f/

UR - https://pubmed.ncbi.nlm.nih.gov/36898113/#full-view-affiliation-1

U2 - 10.1103/PhysRevLett.130.081901

DO - 10.1103/PhysRevLett.130.081901

M3 - Article

C2 - 36898113

VL - 130

SP - 081901

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 8

M1 - 081901

ER -

ID: 71476929