In order to confirm the existence of dibaryon state $d^*(2380)$ observed at WASA@COSY, we estimate production possible and anti-dibaryon pair $d^*\bar{d}^*$ energy region upcoming experiments $\bar{\rm{P}}$anda. Based on some qualitative properties $d^*$ extracted from analysez in non-relativistic quark model, cross section for this spin-3 particle are calculated with help an phenomenological e...

A unified framework for studying extremal curves on real Stiefel manifolds is presented. We start with a smooth one-parameter family of pseudo-Riemannian metrics product orthogonal groups acting transitively manifolds. In the next step Euler-Langrange equations whole class are derived. This includes not only geodesics respect to different Riemannian metrics, but so-...

We reexamine the problem of having nonconservative equations of motion arise from the use of a variational principle. In particular, a formalism is developed that allows the inclusion of fractional derivatives. This is done within the Lagrangian framework by treating the action as a Volterra series. It is then possible to derive two equations of motion, one of these is an advanced equation and ...