The He--McKellar--Wilkens effect for spin-1 particles on non-commutative space

By using star product method, the He-McKellar-Wilkens （HMW） effect for spin-one neutral particle on noncommutative （NC） space is studied. After solving the Kemmer-like equations on NC space, we obtain the topological HMW phase on NC space where the additional terms related to the space-space non-commutativity are given explicitly.     

激光尾场第一周期加速带电粒子模拟

在关于激光尾场加速(LWFA)的很多文献中,都暗示了尾场有周期性结构.可是激光驱动尾场可以不是周期性的,尾场第一周期可以捕获和加速外来电子束.Esirkepov和Bulanov等人提出了带电粒子在激光高斯脉冲驱动尾场第一周期加速的处理方法.本文在此理论基础上进一步讨论电子在尾场第一周期中能获得的最大能量与激光脉冲的强度和脉冲的波长之间的关系.结果显示,捕获电子最大能量与脉冲激光强度成正比.适当的选择脉冲激光波长也直接影响到捕获电子的最大能量值.     

非对易克莱因-高登朗道问题的海森伯代数

文中我们在非对易量子力学(NCQM)的框架下讨论了克莱恩-高登朗道问题.分别在非对易空间(NCS)和非对易相空间(NCPS)中给出了海森伯代数和克莱恩-高登朗道能级.     

Electron Acceleration in Wakefield and Supra-Bubble Regimes by Ultraintense Laser with Asymmetric Pulse

Electron acceleration in plasma driven by circularpolarized ultraintense laser with asymmetric pulse are investigatedanalytically and numerically in terms of oscillation-center Hamiltonian formalism. Studies include wakefield acceleration, which dominates in blow-out or bubble regime and snow-plow acceleration which dominates in supra-bubble regime. By a comparison with each other it is found that snow-plow acceleration has lower acceleration capability. In wakefield acceleration, there exists an obvious optimum pulse asymmetry or/and pulse lengths that leads to the high net energy gain while in snow-plow acceleration it is insensitive to the pulse lengths. Power and linear scaling laws for wakefield and snow-plow acceleration respetively are observed from the net energy gain depending on laser field amplitude. Moreover, there exists also an upper and lower limit on plasma density for an effective acceleration in both of regimes.     

Covariant Tensor Formalism for Partial Wave Analyses of ψ Decays into γBB

Recently BESⅡ collaboration observed an enhancement near the pp invariant mass spectrum. Using the covariant tensor formalism, here we provide theoretical formulae for the partial wave analysis (PWA) of the ψ radiative decay channels ψ→γpp, γΛΛ, γ∑∑,γΞΞ. By performing the Monte Carlo simulation, we give the angular distributions for the photon and proton in the process of J/ψ→γ pp, which may serve as a useful reference for the future PWA on these channels.     

Noncommutative Quantum Hall Effect of Bilayer Systems

In this paper we study the bilayer quantum Hall （QH） effect on a noncommutative phase space （NCPS）. By using perturbation theory, we calculate the energy spectrum, eigenfunction, Hall current, and Hall conductivity of the bilayer QH system, and express them in terms of noncommutative parameters θ and θ^-, respectively. In our calculation, we assume that these parameters vary from laver to laver.     

基于协变张量方法的ψ衰变到γB(-B)的分波分析

最近BESⅡ合作组在p(-p)不变质量谱阈值附近观测到一个增强.利用协变张量方法,给出了ψ辐射衰变道ψ→γp(-p),γ∧(-∧),γ∑(-∑),γΞ(-Ξ)分波分析的理论公式.通过蒙特卡罗模拟,还给出了J/ψ→γp(-p)中光子和质子的角分布,它们可以作为将来对这些道分波分析的有用参考.     

Neutrino masses and flavor mixing in the Extended Double Seesaw Model with two texture zeros

We study the light neutrino mass matrix in the Extended Double Seesaw Model (EDSM), and as a result we get its general form. Also we demonstrate that conventional type-I and double seesaw mechanisms can be regarded as two special cases. We analyze the structure of the 9×9 neutrino mass matrix in this scenario, and surprisingly we find that EDSM will degenerate to a conventional type-I seesaw mechanism when \(M_{\mathrm{R}}= M_{\mathrm{S}}M_{\mu}^{-1}M_{\mathrm{S}}^{T}\) holds exactly. Considering two simple ansätze in two texture zeros for its 3×3 submatrices, we calculate the neutrino masses and flavor mixing angles, in which the θ ₁₃ is a nonzero large angle.