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arXiv 1705.09263hep-thgr-qchep-ph
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双伴随标量双拷贝的经典胶子和引力子辐射

Classical gluon and graviton radiation from the bi-adjoint scalar double copy

Walter D. Goldberger, Siddharth G. Prabhu, Jedidiah O. Thompson

摘要:

我们发现在与动力学色荷耦合的Yang-Mills理论中的经典辐射解和它们在与携带双伴随电荷的粒子线性相互作用的立方双伴随标量场理论中的对应物之间存在双拷贝关系。我们所采用的特殊颜色到运动学的替换是由规范和引力理论中壳层振幅的BCJ双拷贝对应所激发的。它们与最近用来建立规范理论和玻色子引力中经典辐射解之间关系的那些完全相同。我们的显式双伴随解在微扰展开中构造到二阶,并在双拷贝下映射到至多包含立方胶子自相互作用的规范理论解。如果在微扰理论中发现这种对应关系在高阶上仍然存在,我们的结果表明,直接从具有简单得多的(纯立方的)费曼顶点的标量场计算碰撞致密物体的引力辐射是可能的。

英文摘要:

We find double copy relations between classical radiating solutions in Yang-Mills theory coupled to dynamical color charges and their counterparts in a cubic bi-adjoint scalar field theory which interacts linearly with particles carrying bi-adjoint charge. The particular color-to-kinematics replacements we employ are motivated by the BCJ double copy correspondence for on-shell amplitudes in gauge and gravity theories. They are identical to those recently used to establish relations between classical radiating solutions in gauge theory and in dilaton gravity. Our explicit bi-adjoint solutions are constructed to second order in a perturbative expansion, and map under the double copy onto gauge theory solutions which involve at most cubic gluon self-interactions. If the correspondence is found to persist to higher orders in perturbation theory, our results suggest the possibility of calculating gravitational radiation from colliding compact objects, directly from a scalar field with vastly simpler (purely cubic) Feynman vertices.

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