Signals of the littlest Higgs model with T-parity at eγ and ep collisions

The littlest Higgs model with T-parity predicts the existence of the neutral, weakly interacting, new gauge boson B_H, which can be seen as an attractive dark matter candidate. We study production of the new gauge boson B_H via eγ and ep collisions. We find that B_H can be abundantly produced via the subprocesses e^－γ→L^－B_H and γq→B_HQ, which might give rise to characteristic signals. Some discussions about the SM backgrounds for this kind of signals are also given.     

The associated productions of the new gauge boson B_H in the littlest Higgs model with a SM gauge boson via e^+e^- collision

With the high energy and luminosity, the planned ILC has the considerable capability to probe the new heavy particles predicted by the new physics models. In this paper, we study the potential to discover the lightest new gauge boson B_H of the littlest Higgs model via the processes e^+e^- ->r(Z)B_H at the ILC. The results show that the production rates of these two processes are large enough to detect B_H in a wide range of the parameter space, specially for the process e^+e^-->rB_H. Furthermore, there exist some decay modes for B_H which can provide the typical signal and clean background. Therefore, the new gauge boson B_H should be observable via these production processes with the running of the ILC if it exists indeed.     

Production of charmonium(like) states in e+e－ interactions

We present a search for new charmonium like states in e⁺e^－ annihilation using the initial-state radiation and the process e⁺e^－J/ψD^(*)D^(*). The analyses are based on a huge data sample recorded near the Υ(4s) resonance with the Belle detector at the KEKB e⁺e^－ asymmetric-energy collider.     

A note on Ξc(3055)+ and Ξc(3123)+

The Babar Collaboration announced two new excited charmed baryons Ξ_c(3055)⁺ and Ξ_c(3123)⁺. We study their strong decays assuming they are D-wave states. Some assignments are excluded by comparing our numerical results with the experimental values of the total widths of Ξ_c(3055)⁺ and Ξ_c(3123)⁺. We also suggest some possible decay modes, which will be helpful to     

Bounds on the magnetic moment of the τ-neutrino via the process e+e－→ννγ

Using Breit-Wigner resonance relation, bounds on the magnetic moment of the