Consistency of matter models with asymptotically safe quantum gravity

被引：35
|
作者：
Dona, Pietro [1 ,2 ]
Eichhorn, Astrid [3 ]
Percacci, Roberto [1 ,2 ]
机构：
[1] Scuola Int Super Studi Avanzati, I-34136 Trieste, Italy
[2] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy
[3] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada
来源：
CANADIAN JOURNAL OF PHYSICS | 2015年 / 93卷 / 09期
关键词：
RENORMALIZATION-GROUP; EVOLUTION EQUATION; FIXED-POINTS; DARK-MATTER; ONE-LOOP; SUPERGRAVITY;
D O I：
10.1139/cjp-2014-0574
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We discuss the compatibility of quantum gravity with dynamical matter degrees of freedom. Specifically, we present bounds we obtained in Dona et al. (Phys. Rev. D, 89, 084035 (2014) doi:10.1103/PhysRevD.89.084035) on the allowed number and type of matter fields within asymptotically safe quantum gravity. As a novel result, we show bounds on the allowed number of spin-3/2 (Rarita-Schwinger) fields (e.g., the gravitino). These bounds, obtained within truncated renormalization group flows, indicate the compatibility of asymptotic safety with the matter fields of the standard model. Further, they suggest that extensions of the matter content of the standard model are severely restricted in asymptotic safety. This means that searches for new particles at colliders could provide experimental tests for this particular approach to quantum gravity.
引用
收藏
页码：988 / 994
页数：7
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