Spontaneous Lorentz breaking and massive gravity

被引:86
作者
Berezhiani, Z. [1 ]
Comelli, D.
Nesti, F.
Pilo, L.
机构
[1] Univ Aquila, Dipartimento Fis, I-67010 Laquila, Italy
[2] Ist Nazl Fis Nucl, LNGS, I-67010 Laquila, Italy
[3] Ist Nazl Fis Nucl, Sez Ferrara, I-35131 Ferrara, Italy
关键词
D O I
10.1103/PhysRevLett.99.131101
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Theories with an extra spin-two field coupled to gravity admit a massive phase with broken Lorentz symmetry. While the equivalence principle is respected, the Newtonian potentials are in general modified, but they may be protected by a scale symmetry of the coupling term. The gravitational waves phenomenology is quite rich: two gravitons, one massive and one massless, oscillate and propagate with distinct velocities, different from the speed of light. A time of flight difference between gravitons and photons from a common source would provide a clear signal of this theory.
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页数:4
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