Observation of e + e ? ? ? 0 ? 0 ? 2(3823)
Küçük Resim Yok
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Science and Business Media Deutschland GmbH
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Using a data sample corresponding to an integrated luminosity of 11.3 fb?1 collected at center-of-mass energies from 4.23 to 4.70 GeV with the BESIII detector, we observe the process e+e?? ?0?0?2(3823) for the first time with a statistical significance of 6.0 standard deviations. The ratio of average cross sections for e+e?? ?0?0?2(3823) and ?+???2(3823) is determined to be R=?[e+e???0?0?2(3823)]?[e+e???+???2(3823)]=0.57±0.14±0.05, which is consistent with expectations from isospin symmetry. Here and below, the first uncertainties are statistical and the second are systematic. The mass of the ?2(3823) is measured to be M[?2(3823)] = 3824.5 ± 2.4 ± 1.0 MeV/c2. Due to the limited data sample, an upper limit of 18.8 MeV at 90% confidence level is set on the intrinsic width of ?2(3823). [Figure not available: see fulltext.]. © 2023, The Author(s).
Açıklama
Anahtar Kelimeler
E+-E? Experiments, Exotics, Particle And Resonance Production, Spectroscopy
Kaynak
Journal of High Energy Physics
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
2023
Sayı
2
