Meson decays in an extended Nambu—Jona-Lasinio model with heavy quark flavors

In a previous work,we proposed an extended Nambu-Jona-Lasinio(NJL)model including heavy quark flavors.In this work,we will calculate strong and radiative decays of vector mesons in this extended NJL model,including lightρ,ω,K*,(?)and heavy D~*,D_s~*,B~*,B_s~*.     

微观IBM2的内禀凝聚态方法与168Er转动能谱的计算

本文采用内禀凝聚态方法,取消IBM2中通常采用的最大F旋截断近似,对变形核,用内禀凝聚态及其内禀激发来描述低能集体转动态.按照这种理论方法计算了¹⁶⁸Er的低能转动能谱.结果表明,对于激发带,最大F旋截断近似很不好.对中子玻色子和质子玻色子的内禀激发是分别进行的.     

IBM跨壳激发的玻色子展开厄米途径

本文借助Holstein-Primakoff玻色子展开方法在IBM哈密顿量中引入厄米和有限形式的补充项,以描述跨壳激发,并推广内禀凝聚态方法处理闯入态.按照这种理论方法计算了Sn核的低能谱,得到了与实验相符合的振动谱及附加的转动谱.     

SU（3）F Meson Mass Formula from Random Phase Approximation

We present an SU(3)F meson mass formula from random phase approximation. Both the mesons of ground-state pseudoscalar octet and ground-state vector octet are described quite well by this mass formula. We also estimate the current and constituent quark masses from the naive quark model and the PCAC relation.     

色屏蔽效应与重子谱

利用从格点规范理论计算得出的,包括色屏蔽效应的禁闭位势;研究了重子结构,计算了重子谱及相应状态下的夸克分布的均方根半径.     

Study of the heavy molecular states in the quark model with meson exchange interaction

Some charmonium-like resonances such as X(3872) can be interpreted as possible D^(*)D^(*) molecular states. Within the quark model, we study the structure of such molecular states and the similar B^(*)D^(*) molecular states by taking into account the light meson exchange (π, η, ρ, ω and σ) between two light quarks from different mesons.     

Doubly heavy tetraquarks in an extended chromomagnetic model

Using an extended chromomagnetic model,we perform a systematic study of the masses of doubly heavy tetraquarks.We find that the ground states of the doubly heavy tetraquarks are dominated by the color-triplet ■configuration,which is opposite to that of fully heavy tetraquarks.The combined results suggest that the color-triplet configuration becomes more important when the mass difference between the quarks and antiquarks increases.We find three stable states that lie below the thresholds of two pseudoscalar mesons.They are the I^P=01⁺nnbb tetraquark,I^P=1⁺nncb tetraquark,and J^P=1⁺nsbb tetraquark.     

Three-body force and the tetraquark interpretation of light scalar mesons

We study the possible tetraquark interpretation of light scalar meson states a₀(980), f₀(980), κ,σ within the framework of the non-relativistic potential model. The wave functions of tetraquark states are obtained in a space spanned by