Loop-generated bounds on changes to the graviton dispersion relation
Loop-generated bounds on changes to the graviton dispersion relation
复制标题
循环生成的引力子色散关系变化的界限
DOI：
10.1088/1126-6708/2002/03/043
复制
发表时间：
2002
影响因子：
5.4
通讯作者：
Guy D. Moore
中科院分区：
文献类型：
--
作者：
C. Burgess;J. M. Cline;Elise Filotas;Joaquim Matias;Guy D. Moore
We identify the effective theory appropriate to the propagation of massless bulk fields in brane-world scenarios, to show that the dominant low-energy effect of asymmetric warping in the bulk is to modify the dispersion relation of the effective 4-dimensional modes. We show how such changes to the graviton dispersion relation may be bounded through the effects they imply, through loops, for the propagation of standard model particles. We compute these bounds and show that they provide, in some cases, the strongest constraints on nonstandard gravitational dispersions. The bounds obtained in this way are the strongest for the fewest extra dimensions and when the extra-dimensional Planck mass is the smallest. Although the best bounds come for warped 5-D scenarios, for which M5 is O(TeV), even in 4 dimensions the graviton loop can lead to a bound on the graviton speed which is comparable with other constraints.
