Observation of a State X(2600) in the ?^{+}?^{-}?' System in the Process J/????^{+}?^{-}?'
Yükleniyor...
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
NLM (Medline)
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Based on (10087±44)×10^{6}??J/? events collected with the BESIII detector, the process J/????^{+}?^{-}?^{'} is studied using two largest decay channels of the ?^{'} meson, ?^{'}???^{+}?^{-} and ?^{'}???^{+}?^{-}, ????. A new resonance, which we denote as the X(2600), is observed with a statistical significance larger than 20? in the ?^{+}?^{-}?^{'} invariant mass spectrum, and it has a connection to a structure around 1.5??GeV/c^{2} in the ?^{+}?^{-} invariant mass spectrum. A simultaneous fit on the ?^{+}?^{-}?^{'} and ?^{+}?^{-} invariant mass spectra with the two ?^{'} decay modes indicates that the mass and width of the X(2600) state are 2618.3±2.0_{-1.4}^{+16.3}??MeV/c^{2} and 195±5_{-17}^{+26}??MeV, where the first uncertainties are statistical, and the second systematic.
Açıklama
Anahtar Kelimeler
Mass Spectrometry, Meson, Statistical Significance, Uncertainty
Kaynak
Physical Review Letters
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
129
Sayı
4
Künye
Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., . . . BESIII Collaboration. (2022). Observation of a state X(2600) in the π^{+}π^{-}η' system in the process J/ψ→γπ^{+}π^{-}η'. Physical Review Letters, 129(4), 042001. doi:10.1103/PhysRevLett.129.042001
