https://vital.lib.tsu.ru/vital/access/manager/Index en-us 5 https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000584124 Wed 08 Nov 2017 09:51:44 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000621767 Tue 13 Mar 2018 11:23:54 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000584057 Tue 07 Nov 2017 09:49:53 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000494707 Mon 17 Dec 2018 09:56:09 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000529869 n, m=2,3,4,5, n=1,2,3), charmonia J/ψ→ϕ(ππ,KK¯), ψ(2S)→J/ψππ, and the isoscalar S-wave processes ππ→ππ,KK¯,ηη. In this analysis we extend our recent study of low-lying (m=2,3) radial excitations of bottomonia to modes involving higher (m=4,5) excited states. Similarly as for the data on lower radial excitations, we confirm that the data for higher radially excited states from the BABAR and Belle collaborations can be described under conditions that the final bottomonium is a spectator and the multichannel ππ scattering is considered in a model-independent approach based on analyticity, unitarity and the uniformization procedure. Indeed we show that the dipion mass distributions in the two-pion transitions of both charmonia and bottomonia states are explained by a unified mechanism based on the contribution of the ππ and KK¯ coupled channels including their interference (final-state interactions). Therefore, our main result is that the lower and higher radially excited states of charmonia and bottomonia have no specific features in mutual comparison and can be understood in a unified picture, e.g. proposed by our approach.]]> Mon 10 Dec 2018 16:43:09 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000533869 gamma_ISR X(3872) -> gamma_ISR pi+pi-J/psi via the Initial State Radiation technique. The production of a resonance with quantum numbers J^PC = 1^++ such as the X(3872) via single photon e+e- annihilation is forbidden, but is allowed by a next-to-leading order box diagram. We do not observe a significant signal of X(3872), and therefore give an upper limit for the electronic width times the branching fraction Gamma_ee^X(3872)Br(X(3872) -> pi+pi-Jpsi) < 0.13 eV at the 90% confidence level. This measurement improves upon existing limits by a factor of 46. Using the same final state, we also measure the electronic width of the psi(3686) to be Gamma_ee^psi(3686) = 2231 +- 18 +- 99 eV.]]> Mon 03 Dec 2018 12:37:49 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000552764 Mon 03 Dec 2018 09:49:51 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000533214 Fri 07 Dec 2018 09:51:05 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000635303 Fri 02 Nov 2018 10:47:48 KRAT ]]>