Результаты исследований: Научные публикации в периодических изданиях › статья
Strong and Weak CP Tests in Sequential Decays of Polarized Σ^{0} Hyperons. / The BESIII Collaboration ; Николаев, Иван Борисович; Ачасов, Михаил Николаевич и др.
в: Physical Review Letters, Том 133, № 10, 101902, 04.09.2024, стр. 101902.Результаты исследований: Научные публикации в периодических изданиях › статья
}
TY - JOUR
T1 - Strong and Weak CP Tests in Sequential Decays of Polarized Σ^{0} Hyperons
AU - BESIII Collaboration
AU - Ablikim, M.
AU - Adlarson, P.
AU - Afedulidis, O.
AU - Ai, X. c.
AU - Aliberti, R.
AU - Amoroso, A.
AU - An, Q.
AU - Bai, Y.
AU - Bakina, O.
AU - Balossino, I.
AU - Ban, Y.
AU - Bao, H.-R.
AU - Batozskaya, V.
AU - Begzsuren, K.
AU - Berger, N.
AU - Berlowski, M.
AU - Bertani, M.
AU - Bettoni, D.
AU - Bianchi, F.
AU - Bianco, E.
AU - Bortone, A.
AU - Briere, R. a.
AU - Brueggemann, A.
AU - Николаев, Иван Борисович
AU - Ачасов, Михаил Николаевич
AU - Мучной, Николай Юрьевич
PY - 2024/9/4
Y1 - 2024/9/4
N2 - The J/ψ, ψ(3686)→ς0ς¯0 processes and subsequent decays are studied using the world's largest J/ψ and ψ(3686) data samples collected with the BESIII detector. The parity-violating decay parameters of the decays ς0→Λγ and ς¯0→Λ¯γ, ας0=-0.0017±0.0021±0.0018 and α¯ς0=0.0021±0.0020±0.0022, are measured for the first time. The strong CP symmetry is tested in the decays of the ς0 hyperons for the first time by measuring the asymmetry ACPς=ας0+α¯ς0=(0.4±2.9±1.3)×10-3. The weak CP test is performed in the subsequent decays of their daughter particles Λ and Λ¯. Also for the first time, the transverse polarizations of the ς0 hyperons in J/ψ and ψ(3686) decays are observed with opposite directions, and the ratios between the S-wave and D-wave contributions of the J/ψ, ψ(3686)→ς0ς¯0 decays are obtained. These results are crucial to understand the decay dynamics of the charmonium states and the production mechanism of the ς0-ς¯0 pairs.
AB - The J/ψ, ψ(3686)→ς0ς¯0 processes and subsequent decays are studied using the world's largest J/ψ and ψ(3686) data samples collected with the BESIII detector. The parity-violating decay parameters of the decays ς0→Λγ and ς¯0→Λ¯γ, ας0=-0.0017±0.0021±0.0018 and α¯ς0=0.0021±0.0020±0.0022, are measured for the first time. The strong CP symmetry is tested in the decays of the ς0 hyperons for the first time by measuring the asymmetry ACPς=ας0+α¯ς0=(0.4±2.9±1.3)×10-3. The weak CP test is performed in the subsequent decays of their daughter particles Λ and Λ¯. Also for the first time, the transverse polarizations of the ς0 hyperons in J/ψ and ψ(3686) decays are observed with opposite directions, and the ratios between the S-wave and D-wave contributions of the J/ψ, ψ(3686)→ς0ς¯0 decays are obtained. These results are crucial to understand the decay dynamics of the charmonium states and the production mechanism of the ς0-ς¯0 pairs.
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85204513183&origin=inward&txGid=ef93ab330d130d8a8dee51566f541d68
UR - https://pubmed.ncbi.nlm.nih.gov/39303247/
UR - https://www.mendeley.com/catalogue/d089f5e0-644b-3586-a953-379cbb6b6e29/
U2 - 10.1103/PhysRevLett.133.101902
DO - 10.1103/PhysRevLett.133.101902
M3 - Article
C2 - 39303247
VL - 133
SP - 101902
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 10
M1 - 101902
ER -
ID: 62704000