THE ANALYSIS OF B→ηK* AND B→ϕK_S DECAYS IN A FLAVOR CHANGING Z′ MODEL

Abstract

We study the large branching ratios of B→ηK* decays and the time-dependent CP asymmetry SϕKS anomaly of B→ϕKS decay in a flavor changing Z′ model associated with flavor changing neutral currents at the tree level. Considering the right-handed flavor changing couplings and setting ξLL = ξRL = ξLR = ξRR = ξ, we obtain 0.011 < ξ < 0.0131, this parameter region could give a simultaneous explanation to these anomalies of B→ηK* and B→ϕKS decays. The results are consistent with the constraints and the assumptions of some references.

One-electron self-energies and spectral functions for thet−Jmodel in the large-Nlimit

“…Recently 11 , the PIH approach was extended to the case of finite J. The obtained phase diagram and chargecorrelations were compared with other calculations based on SB 12 and Bayn Kadanoff functional theory (BKF) 13 finding good agreement.…”

One-particle spectral properties of thet−J−Vmodel on the triangular lattice near charge order

“…Related expansions were used in the past in the frame of a slave boson formulation for the t-J model. 12 However, due to the gauge fields inherent to slave bosons, such an expansion cannot be performed in a systematic way. 13 Our formalism is based on X operators that do not introduce gauge fields, such that the present treatment is free of the above mentioned difficulties.…”