标题： 非对称核物质中$Δ\rightarrow p$跃迁的跃迁磁矩 显示英文标题

标题： Transition magnetic moments for $Δ\rightarrow p$ transition in asymmetric nuclear matter

摘要： 本工作中，我们利用手征SU(3)夸克平均场模型，在有限温度下计算了同位旋非对称核介质中，由$\Delta$重子跃迁到质子$(\Delta \rightarrow p)$的辐射衰变磁矩。在手征SU(3)平均场模型框架内，通过标量场$(\sigma, \zeta, \delta)$和矢量场$(\omega, \rho)$的交换，同位旋非对称介质中重子的性质被修正。介质的同位旋不对称性通过标量同位旋矢量场$\delta$和矢量同位旋矢量场$\rho$加以考虑。 我们利用手征SU(3)夸克平均场模型计算了非对称物质中夸克、质子和$\Delta$重子的介质修正质量，并将其作为输入用于手征构成夸克（$\chi$CQM）模型，以计算不同温度和密度介质的同位旋不对称性下的$(\Delta \rightarrow p)$转变的介质修正磁矩。 为了计算重子的磁矩，在这些计算中考虑了价夸克、夸克海以及夸克海的轨道角动量的贡献。 显示英文摘要

摘要： In the present work we calculate the transition magnetic moments for the radiative decays of $\Delta$ baryon to proton $(\Delta \rightarrow p)$ in isospin asymmetric nuclear medium at finite temperature using chiral SU(3) quark mean field model. Within the framework of chiral SU(3) mean field model, the properties of baryons in asymmetric medium are modified through the exchange of scalar fields $(\sigma, \zeta, \delta)$ and vector fields $(\omega, \rho)$. The isospin asymmetry of medium is taken into account via scalar-isovector field $\delta$ and vector iso-vector field $\rho$. We calculate the in-medium masses of quarks, proton and $\Delta$ baryon in asymmetric matter within the chiral SU(3) quark mean field model and use these as input in the chiral constituent quark ($\chi$CQM) model to calculate the in-medium transition magnetic moments for $(\Delta \rightarrow p)$ transition for different values of isospin asymmetry of hot and dense medium. For calculating the magnetic moments of baryons, contributions of valence quarks, quark sea and orbital angular momentum of quark sea are considered in these calculations.