Study of the f0 (980) and f0 (500) Scalar Mesons through the Decay Ds+ ??+?-e+?e
Küçük Resim Yok
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
American Physical Society
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Using e+e- collision data corresponding to an integrated luminosity of 7.33 fb-1 recorded by the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV, we present an analysis of the decay Ds+??+?-e+?e, where the Ds+ is produced via the process e+e-?Ds?±D. We observe the f0(980) in the ?+?- system and the branching fraction of the decay Ds+?f0(980)e+?e with f0(980)??+?- measured to be (1.72±0.13stat±0.10syst)×10-3, where the uncertainties are statistical and systematic, respectively. The dynamics of the Ds+?f0(980)e+?e decay are studied with the simple pole parametrization of the hadronic form factor and the Flatté formula describing the f0(980) in the differential decay rate, and the product of the form factor f+f0(0) and the c?s Cabibbo-Kobayashi-Maskawa matrix element |Vcs| is determined for the first time to be f+f0(0)|Vcs|=0.504±0.017stat±0.035syst. Furthermore, the decay Ds+?f0(500)e+?e is searched for the first time but no signal is found. The upper limit on the branching fraction of Ds+?f0(500)e+?e, f0(500)??+?- decay is set to be 3.3×10-4 at 90% confidence level. © 2024 authors. Published by the American Physical Society.
Açıklama
Anahtar Kelimeler
Branching Fractions, Center-Of-Mass Energies, Centre-Of-Mass Energies, Decay Rate, Differential Decays, Hadronic Form Factors, Integrated Luminosity, Scalar Mesons, Simple Pole Parametrization, Uncertainty, Approximation Theory, Article, Drug Therapy, Human, Luminance, Meson, Middle Aged
Kaynak
Physical Review Letters
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
132
Sayı
14
