Measurement of e+ e- ? ??' cross sections at center-of-mass energies from 3.508 to 4.951 GeV and search for the decay ?(3770) ? ??'
Küçük Resim Yok
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Physical Soc
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The cross sections of the e(+) e(-) -> phi eta' process at center-of-mass energies from 3.508 to 4.951 GeV are measured with high precision using 26.1 fb(-1) data collected with the BESIII detector operating at the BEPCII storage ring. The cross sections are of the order of a few picobarn and decrease as the center-of-mass energy increases as s(-n/2) with n = 4.35 +/- 0.14. This result is in agreement with the Nambu-Jona-Lasinio model prediction of n = 3.5 +/- 0.9. In addition, the charmless decay psi(3770) -> phi eta' is searched for by fitting the measured cross sections, yet no significant signal is observed. The upper limit of B(psi(3770) -> phi eta') at the 90% confidence level is determined to be 2.3 x 10(-5).
Açıklama
Anahtar Kelimeler
Jona-Lasinio Model, Branching Fraction, Annihilation, Charmonium, Tof
Kaynak
Physical Review D
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
108
Sayı
5
