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Scattering of an Infraparticle: The one particle sector in Nelson's massless model

机译:基础粒子的散射:Nelson无质量模型中的一个粒子扇区

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In the one-particle sector of Nelson's massless model, we construct scattering states in the time-dependent approach. On the so-defined scattering subspaces, the convergence of the asymptotic Weyl operators related to the boson field as well as the asymptotic limit of the mean velocity of the infraparticle are established. The construction relies on some spectral results concerning the one-particle (improper) states of the system. Moreover, in the region of physical interest, we assume a positive bound from below for the second derivative of the ground state energy as a function of the total momentum, uniform in the limit of no infrared cut-off in the interaction term.
机译:在纳尔逊无质量模型的单粒子扇区中,我们以时间依赖的方式构造散射状态。在这样定义的散射子空间上,建立了与玻色子场有关的渐近Weyl算子的收敛性以及次粒子平均速度的渐近极限。该构造依赖于有关系统的单粒子(不正确)状态的一些光谱结果。此外,在对物理感兴趣的区域中,我们从下方假设基态能量的二阶导数作为总动量的函数的正边界,并且在相互作用项中没有红外截止的范围内是均匀的。

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