Observation of ? (3686) ?p p ?
Yükleniyor...
Dosyalar
Tarih
2019-06-27
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
American Physical Society
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Using a data sample of 4.48×108 ?(3686) events collected with the BESIII detector, we present a first observation of ?(3686)?pp ?, and we measure its branching fraction to be [6.06±0.38(stat)±0.48(syst)]×10-6. In contrast to the earlier discovery of a threshold enhancement in the pp-mass spectrum of the channel J/???pp, denoted as X(pp), we do not find a similar enhancement in ?(3686)?pp?. An upper limit of 1.82×10-7 at the 90% confidence level on the branching fraction of ?(3686)?X(pp)??pp? is obtained.
Açıklama
Anahtar Kelimeler
Kaynak
PHYSICAL REVIEW D
WoS Q Değeri
Q1