A partial-wave analysis of the K−Φ system produced in the reaction K−p → K+K−K−p at 18.5 GeV/c

Observation of a peaking structure in the J/ψϕ mass spectrum from B±Chatrchyan1, Khachatryan2, Sirunyan3 et al. 2014Physics Letters BSelf Cite1265560View full textAdd to dashboardCite

“…These could potentially produce reflected structures in the J/ψφ spectrum. In particular, a D-wave contribution to K − p scattering in the mass region around 1.7-1.8 GeV has been reported by several fixed-target experiments [29][30][31]. This is interpreted as two interfering broad J P = 2 − resonances, labeled K 2 (1770) and K 2 (1820), with widths in the range 200-300 MeV.…”

A systematic study of mass spectra and strong decay of strange mesons

“…4, we show the partial and total decay widths of the K 1 (1650) depending on the mixing angle θ 2P if the mass of the K 1 ( 1650) is adored to be M = 1650 ± 50 MeV [1]. Since the decays of K 1 (1650) into Kππ and Kφ were observed in experiments [55,[65][66][67], we can roughly conclude that θ 2P is probably less than zero as seen from Fig. 4, where Kρ, Kφ and K * π have sizable contributions to the total decay width of the K 1 (1650) in our calculation.…”

Search for theX(4140)state inB+→J/ψϕK+decays

“…Fitting the second state at a mass of 4274.44 MeV and with a width of 32.3 MeV [3] does not affect the Xð4140Þ yield. Reflections of K resonances [26,27] and possible broad J=c resonances can also contribute near and under the narrow Xð4140Þ resonance. To explore the sensitivity of our results to the assumed background shape, we also fit the data in the 1020-1400 MeV range with a quadratic function multiplied by the efficiency-corrected three-body phase-space factor (F bkg 2 ) to impose the kinematic threshold.…”