论文标题
在复合颗粒的相对论理论中，培养重力形式因素
Pion gravitational form factors in a relativistic theory of composite particles
论文作者
论文摘要
我们扩展了复合系统的电子特性的相对论理论，以同时描述Hadron的重力形式。该方法基于即时形式相对论量子力学的版本，并利用了修改后的脉冲近似。我们利用本地运算符的相对论不变次数参数化的一般方法来编写具有任意自旋的粒子的能量量张量。我们使用获得的结果来计算假设点样组成夸克的乳杆的重力形式。除了我们的第一原则模型的一个参数外，所有参数均在电磁形式的作品中固定。唯一的免费参数$ d_ {q} $是组成夸克的重力形式的特征。 PION的派生形式满足了强子结构量子场理论的一般原理给出的约束。计算出的重力形式因子和重力均方根半径与已知结果合理一致。
We extend our relativistic theory of electroweak properties of composite systems to describe simultaneously the gravitational form factors of hadrons. The approach is based on a version of the instant-form relativistic quantum mechanics and makes use of the modified impulse approximation. We exploit the general method of the relativistic invariant parametrizaton of local operators to write the energy-momentum tensor of a particle with an arbitrary spin. We use the obtained results to calculate the gravitational form factors of the pion assuming point-like constituent quarks. All but one parameters of our first-principle model were fixed previously in works on electromagnetic form factors. The only free parameter, $D_{q}$, is a characteristic of the gravitational form factor of a constituent quark. The derived form factors of the pion satisfy the constraints given by the general principles of the quantum field theory of hadron structure. The calculated gravitational form factors and gravitational mean-square radius are in a reasonable agreement with known results.
