Loop-corrected Virasoro symmetry of 4D quantum gravity

Journal of High Energy Physics

T. He¹  D. Kapec¹  A. Raclariu¹  A. Strominger¹ 

[1] Center for the Fundamental Laws of Nature, Harvard University;

关键词: Models of Quantum Gravity;    Scattering Amplitudes;    Space-Time Symmetries;   

DOI  :  10.1007/JHEP08(2017)050

来源: DOAJ

【 摘 要 】

Abstract Recently a boundary energy-momentum tensor T zz has been constructed from the soft graviton operator for any 4D quantum theory of gravity in asymptotically flat space. Up to an “anomaly” which is one-loop exact, T zz generates a Virasoro action on the 2D celestial sphere at null infinity. Here we show by explicit construction that the effects of the IR divergent part of the anomaly can be eliminated by a one-loop renormalization that shifts T zz .

【 授权许可】

Unknown