Study of the reactions e+e− → ρη, ρπ, φπandφη for total energy ranges between 1.4 and 2.18 GeV

The reactions e⁺e^? → ρη, ρπ, φπ and φη have been studied with the magnetic detector DM1 at DCI in the total energy ranges between 1.4 and 2.18 GeV. The ρη signal is clearly seen. Upper limits for ρπ and φη channels as well as for the OZI forbidden φπ channel.     

Study of e+e− → KS0K±π∓ in the 1.4–2.18 GeV energy range: A new observation of an isoscalar vector meson: φ′ (1.65 GeV)

First measurements of the e⁺e^? → K_S⁰K^±π^? reaction in the 1.4–2.18 GeV energy range have been performed with the magnetic detector DM1 at the Orsay storage rings DCI. The cross section is rather large. The production is mainly K¹⁰K⁰ which reveals an interference between isovector and isoscalar amplitudes. These results show again the existence of an isoscalar vector at 1.65 GeV shown to be a φ′ meson.     

A concise synthesis of silanediol-based transition-state isostere inhibitors of proteases

[reaction: see text] An efficient synthesis of silanediol-based transition-state inhibitors of proteases is described. A new convergent synthesis has been optimized by using a two-step sequence of hydrosilylation followed by the addition of a silyllithio species to an imine. The method should be applicable to the synthesis of a wide variety of silanediol isosteres to probe the utility of this unique transition-state isostere.     

Study of the reaction e+e− → K+K− in the total energy range 1400–2060 MeV

The e⁺e^? → K⁺K^? cross section has been measured between 1400 and 2060 MeV. About 500 K⁺K^? events were detected in the magnetic detector DM1 at the Orsay storage rings DCI. The charged kaon form factor is appreciably higher than predicted by only the ?, ω, ø tails, suggesting contributions from higher vector mesons.