大气物理探测--卫星云图的接收与应用实验

将气象卫星云图的接收与应用开设为高校近代物理实验 ,可以使学生了解卫星遥感探测技术、卫星云图的接收、云图的特征和云图的识别方法 ,对拓宽学生的知识面 ,培养学生的综合能力是很有益的 .本文介绍了气象卫星遥感大气和卫星云图接收机的基本原理 ,以及实验内容与要求 .     

Comprehensive analysis of e+e-→γηc(2S)

We discuss the production of η_c(2S) through the process e⁺e^-→γη_c(2S), where the leading contribution originates from 1-loop electroweak corrections. Adopting some reasonable light-cone distribution amplitudes, we analyze the cross section of this process. As the electron-positron center of mass energy √s=3770 MeV, the typical production cross section of this process is about 1 fb.     

Constraint on the warped space from B→X_sγ

We analyze the theoretical prediction on the branching ratio of B→X_sγ to order Λ_EW²/Λ_KK² in extension of the standard model with a warped extra dimension and the custodial symmetry SU(3)_c×SU(2)_L×SU(2)_R×U(1)_X×P_LR, where Λ_KK denotes the energy scale of low-lying Kaluze-Klein excitations and Λ_EW denotes the electroweak energy scale. Contributions from the in nite series of Kaluze-Klein excitations are summed over through the residue theorem. The numerical result indicates that the present experimental data constrain the parameter space of the concerned model strongly.     

溴代环丙烷与酰胺在Ullmann反应条件下的反应研究

在某些情况下,三元环的性质与烯基的C＝C双键相似,而烯基溴代物已被广泛应用于Ullmann反应,因此,本文考察了1-溴-2-苯基环丙烷与酰胺在Ullmann条件下的反应情况.结果显示,在此反应条件下,环丙烷结构发生了开环,开环后的产物会发生双分子偶联;当在体系中加入亲核体时,开环的物质同时会与亲核体发生偶联反应,反应效...     

Top quark decay to a 125 GeV Higgs in the BLMSSM

In this paper, we calculate the rare top quark decay t → ch in a supersymmetric extension of the Standard Model where baryon and lepton numbers are local gauge symmetries. Adopting reasonable assumptions on the parameter space, we nd that the branching ratios of t→ch can reach 10^-3, which could be detected in the near future.     

修约间隔规则与回归系数的有效位数

从微小标准偏差准则导出独立测量结果修约间隔的确定规则.考虑回归系数之间强相关性,系数不确定度的有效位数常常需要保留到两位以上.引入有效修约间隔,导出回归系数修约间隔的确定公式,结合实验物理中的多种不同回归类型例子说明了回归系数的有效位数确定方法.     

t →cγ and t →cg in Local Gauged Baryon and Lepton Numbers

In this paper, we calculate the top quark rare decays t →cγ and v in an extension of the standard model, where baryon number and lepton number are local gauge symmetries. Adopting reasonable assumptions on the parameter space, we find that the branching ratios of t →cγ and t →cg can reach 10^-6 and 10^-5 respectively, which can be detected in near future.     

耦合量子细胞的非线性特性

研究了两种不同排列的耦合量子细胞的非线性特性.方形量子细胞由位于角上的四个量子点组成,设每个量子细胞内包含两个电子,则不同的量子细胞将通过库仑作用发生耦合.单个细胞内的电子易于占据位于对角线上的量子点,从而导致了细胞的极化.当一个细胞的极化率发生改变时,在稳定态的情况下,计算了另一个细胞的极化率.研究结果表明,在适当的参数下,第二个细胞的极化率的响应显示出良好的非线性特性. 关键词： 极化响应 量子细胞 量子点     

One-loop on-shell renormalization of MSSM vertexes

The on-shell renormalization scheme for electroweak theory is well studied in the standard model (SM), but a consistent on-shell renormalization scheme for the minimal supersymmetric standard model (MSSM) is still unknown. In the MSSM, we study the on-shell scheme for three vertexes: Zl^Il^I, W⁺v^Il^I and , with virtual SUSY particles (chargino, sneutrino, neutralino and slepton) at one-loop order. Instead of the amplitude of a single triangle diagram, the sum of the amplitude of triangle diagrams belonging to one suit can be renormalized in the on-shell scheme. One suit points out that the internal virtual particles are consistent. The zero-momentum scheme is also used for the renormalization. The two schemes can make the renormalized results decoupled, and in the MSSM some of the special characters of the on-shell scheme are shown. This work is propitious in completing the on-shell renormalization scheme in the MSSM.     

浅议物理教师对提高学生人文素养的影响

营造以人为本的教学氛围,促进学生提高自身人文修养的教学过程中,教师起着关键的引导作用.著名教育家苏霍姆林斯基说过:"形象地说,学校好比一种精致的乐器,它奏出一种人的和谐旋律,使之影响学生的心灵;但要奏出这样的旋律,必须把乐器的音调调准,而这种乐器是靠教育者的人格来调和的."