11,277 research outputs found
The neutral top-pion and the lepton flavor violating decays
Taking into account the constraints of the present experimental limit of the
process on the free parameters of topcolor-assisted
technicolor(TC2) models, we calculate the contributions of the neutral top-pion
to the lepton flavor violating(LFV) decays . Our results
show that the value of the branching ratio is larger than
that of in all of the parameter space and there is , which is far from the
reach of present or future experiments.Comment: 12 pages and 3 figures. To be published in J. Phys.
New Pinning Synchronization of Complex Networks with Time-Varying Coupling Strength and Nondelayed and Delayed Coupling
The pinning synchronization problem for a class of complex networks
is studied by a stochastic viewpoint, in which both time-varying coupling strength and nondelayed and delayed coupling are included. Different from the traditionally similar methods, its interval is separated into two subintervals and described by a Bernoulli variable. Both bounds and switching probability of such
subintervals are contained. Particularly, the nondelayed and delayed couplings occur alternately in which another independent Bernoulli variable is introduced. Then, a new kind of pinning controller without time-varying coupling strength signal is developed, in which only its bounds and probabilities are contained. When such probabilities are unavailable, two different kinds of adaption laws are established to make the complex network globally synchronous. Finally, the validity of the presented methods is proved through a numerical example
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