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Is gravity the weakest force?
Classical and Quantum Gravity ( IF 3.5 ) Pub Date : 2020-10-27 , DOI: 10.1088/1361-6382/abc524
Satoshi Shirai , Masahito Yamazaki

It has recently been suggested that "gravity is the weakest force" in any theory with a suitable UV completion within quantum gravity. One formulation of this statement is the scalar weak gravity conjecture, which states that gravity is weaker than the force originating from scalar fields. We study the scalar weak gravity conjecture in de Sitter space, and discuss its low-energy consequences in light of the experimental searches for fifth forces and violations of the equivalence principle. We point out that some versions of the scalar weak gravity conjecture forbid the existence of very light scalar particles, such as the quintessence and axion-like particles. The absence of the quintessence field means that these versions of the scalar weak gravity conjecture are in phenomenological tension with the recently-proposed de Sitter swampland conjecture and its refinements. Some other versions of the scalar weak gravity conjecture escape these constraints, and could have interesting phenomenological consequences.

中文翻译:

重力是最弱的力吗?

最近有人提出“引力是最弱的力”,在量子引力中具有合适的紫外线完成的任何理论。该陈述的一种表述是标量弱引力猜想,它指出引力比源自标量场的力弱。我们研究了德西特空间中的标量弱引力猜想,并根据对第五力的实验搜索和对等价原理的违反来讨论其低能量后果。我们指出,标量弱引力猜想的某些版本禁止存在非常轻的标量粒子,例如精髓和类轴子粒子。典型场的缺失意味着标量弱引力猜想的这些版本与最近提出的德西特沼泽猜想及其改进处于现象学张力中。标量弱引力猜想的一些其他版本摆脱了这些限制,可能会产生有趣的现象学后果。
更新日期:2020-10-27
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