Research output: Contribution to journal › Article › peer-review
Determination of Spin-Parity Quantum Numbers for the Narrow Structure near the pΛ[over ¯] Threshold in e^{+}e^{-}→pK^{-}Λ[over ¯]+c.c. / BESIII Collaboration ; Мучной, Николай Юрьевич; Николаев, Иван Борисович.
In: Physical Review Letters, Vol. 131, No. 15, 13.10.2023, p. 151901.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Determination of Spin-Parity Quantum Numbers for the Narrow Structure near the pΛ[over ¯] Threshold in e^{+}e^{-}→pK^{-}Λ[over ¯]+c.c
AU - BESIII Collaboration
AU - Achasov, M N
AU - Chen, C
AU - Мучной, Николай Юрьевич
AU - Николаев, Иван Борисович
N1 - Determination of Spin-Parity Quantum Numbers for the Narrow Structure near the pΛ¯ Threshold in e+e−→pK−Λ¯+c.c. / BESIII Collaboration // Physical Review Letters. – 2023. – Vol. 131, No. 15. – P. 151901. – DOI 10.1103/physrevlett.131.151901
PY - 2023/10/13
Y1 - 2023/10/13
N2 - A narrow structure in the pΛ[over ¯] system near the mass threshold, named as X(2085), is observed in the process e^{+}e^{-}→pK^{-}Λ[over ¯] with a statistical significance greater than 20σ. Its spin and parity are determined for the first time to be J^{P}=1^{+} in an amplitude analysis, with a statistical significance greater than 5σ over other quantum numbers (0^{-},1^{-} and 2^{+}). The pole positions of X(2085) are measured to be M_{pole}=(2084_{-2}^{+4}±9) MeV and Γ_{pole}=(58_{-3}^{+4}±25) MeV, where the first uncertainties are statistical and the second ones are systematic. The analysis is based on the study of the process e^{+}e^{-}→pK^{-}Λ[over ¯] and uses the data samples collected with the BESIII detector at the center-of-mass energies sqrt[s]=4.008, 4.178, 4.226, 4.258, 4.416, and 4.682 GeV with a total integrated luminosity of 8.35 fb^{-1}.
AB - A narrow structure in the pΛ[over ¯] system near the mass threshold, named as X(2085), is observed in the process e^{+}e^{-}→pK^{-}Λ[over ¯] with a statistical significance greater than 20σ. Its spin and parity are determined for the first time to be J^{P}=1^{+} in an amplitude analysis, with a statistical significance greater than 5σ over other quantum numbers (0^{-},1^{-} and 2^{+}). The pole positions of X(2085) are measured to be M_{pole}=(2084_{-2}^{+4}±9) MeV and Γ_{pole}=(58_{-3}^{+4}±25) MeV, where the first uncertainties are statistical and the second ones are systematic. The analysis is based on the study of the process e^{+}e^{-}→pK^{-}Λ[over ¯] and uses the data samples collected with the BESIII detector at the center-of-mass energies sqrt[s]=4.008, 4.178, 4.226, 4.258, 4.416, and 4.682 GeV with a total integrated luminosity of 8.35 fb^{-1}.
UR - https://pubmed.ncbi.nlm.nih.gov/37897776/
UR - https://www.elibrary.ru/item.asp?id=63250080
U2 - 10.1103/PhysRevLett.131.151901
DO - 10.1103/PhysRevLett.131.151901
M3 - Article
C2 - 37897776
VL - 131
SP - 151901
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 15
ER -
ID: 68338141