We consider the scalar bremsstrahlung of the spinless relativistic particle, which interacts with infinitely thin cosmic string by linearized gravity. With the iterational scheme, based on the Perturbaion Theory with respect to the Newtonian constant, we compute the radiation amplitude and the emitted energy due to collision. The general phenomenon of mutual cancellation of the leading terms on the local and non-local amplitude, known in the ultrarelativistic regime for several types of collision, also takes place here. Remarkably, this cancellation (destructive interference) is complete, and takes place for any particle’s velocity. We compute the spectral and angular distributions of the emitted waves. Particular attention is paid to the ultrarelativistic case. Due to the radiation emission, a string may lose its energy and decrease the tension; it may affect all field effects, including the vacuum polarization and the Casimir effect, in terms of physical problems with the real cosmic strings.

中文翻译：

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宇宙弦与点电荷相互作用中的标量辐射

我们考虑无自旋相对论粒子的标量轫致辐射，它通过线性引力与无限细的宇宙弦相互作用。使用迭代方案，基于关于牛顿常数的扰动理论，我们计算辐射幅度和由于碰撞而发射的能量。局部和非局部振幅的主要项相互抵消的一般现象，在几种类型碰撞的超相对论体系中已知，也发生在这里。值得注意的是，这种抵消（破坏性干扰）是完全的，并且发生在任何粒子的速度上。我们计算发射波的光谱和角度分布。特别注意超相对论的情况。由于辐射发射，弦可能会失去能量并降低张力；