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Observation of the Anomalous Shape of X (1840) in J/ψ →γ3 (π+π-) Indicating a Second Resonance Near p p ¯ Threshold. / The BESIII Collaboration ; Мучной, Николай Юрьевич.
в: Physical Review Letters, Том 132, № 15, 151901, 12.04.2024.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Observation of the Anomalous Shape of X (1840) in J/ψ →γ3 (π+π-) Indicating a Second Resonance Near p p ¯ Threshold
AU - BESIII Collaboration
AU - Achasov, M. N.
AU - Nikolaev, I. B.
AU - Pan, Y.
AU - Мучной, Николай Юрьевич
N1 - Observation of the Anomalous Shape of X(1840) in J/ψ→γ3(π+π−) Indicating a Second Resonance Near pp¯ Threshold / The BESIII Collaboration // Physical Review Letters. – 2024. – Vol. 132, No. 15. – P. 151901. – DOI 10.1103/physrevlett.132.151901. – EDN PGDUZJ.
PY - 2024/4/12
Y1 - 2024/4/12
N2 - Using a sample of (10087±44)×106 J/ψ events, which is about 45 times larger than that was previously analyzed, a further investigation on the J/ψ→γ3(π+π-) decay is performed. A significant distortion at 1.84 GeV/c2 in the line shape of the 3(π+π-) invariant mass spectrum is observed for the first time, which could be resolved by two overlapping resonant structures, X(1840) and X(1880). The new state X(1880) is observed with a statistical significance larger than 10σ. The mass and width of X(1880) are determined to be 1882.1±1.7±0.7 MeV/c2 and 30.7±5.5±2.4 MeV, respectively, which indicates the existence of a pp¯ bound state.
AB - Using a sample of (10087±44)×106 J/ψ events, which is about 45 times larger than that was previously analyzed, a further investigation on the J/ψ→γ3(π+π-) decay is performed. A significant distortion at 1.84 GeV/c2 in the line shape of the 3(π+π-) invariant mass spectrum is observed for the first time, which could be resolved by two overlapping resonant structures, X(1840) and X(1880). The new state X(1880) is observed with a statistical significance larger than 10σ. The mass and width of X(1880) are determined to be 1882.1±1.7±0.7 MeV/c2 and 30.7±5.5±2.4 MeV, respectively, which indicates the existence of a pp¯ bound state.
UR - https://www.mendeley.com/catalogue/aaf4655d-d4d1-357f-9c97-62dca7b96454/
UR - https://pubmed.ncbi.nlm.nih.gov/38682972/
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85190064772&origin=inward&txGid=9b5c9ed60f10259905480700cff88894
UR - https://elibrary.ru/item.asp?id=66741512
U2 - 10.1103/PhysRevLett.132.151901
DO - 10.1103/PhysRevLett.132.151901
M3 - Article
C2 - 38682972
VL - 132
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 15
M1 - 151901
ER -
ID: 62677020