Precision Study of eta ' -> gamma pi(+) pi(-) Decay Dynamics
Yükleniyor...
Dosyalar
Tarih
2018-06-14
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
AMER PHYSICAL SOC
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Using a low background data sample of 9.7 x 10(5) J/psi -> gamma eta',eta' -> gamma pi(+)pi(-) events, which are 2 orders of magnitude larger than those from the previous experiments, recorded with the BESIII detector at BEPCII, the decay dynamics of eta' -> gamma pi(+)pi(-) are studied with both model-dependent and model-independent approaches. The contributions of. and the rho(770)-omega interference are observed for the first time in the decays eta' -> gamma pi(+)pi(-) in both approaches. Additionally, a contribution from the box anomaly or the rho(1450) resonance is required in the model-dependent approach, while the process specific part of the decay amplitude is determined in the model-independent approach.
Açıklama
Anahtar Kelimeler
INITIAL-STATE RADIATION, KLOE DETECTOR, CROSS-SECTION, FORM-FACTOR, RHO-MESON, COLLISIONS, WIDTH, PI(+)PI(-)), ETA'(958), E(+)E(-)
Kaynak
PHYSICAL REVIEW LETTERS
WoS Q Değeri
Q1
