A fifth force may occur that disturbs the estimates general relativity creates outside our own galaxy, on cosmic-length measures. University of Pennsylvania astrophysicist, Bhuvnesh Jain, states the nature of gravity is the interrogation of a lifetime. As researchers have been able to see beyond and deeper into the cosmos, the laws of gravity have been exposed to be under the effect of a mysterious force. Two divisions of theories have bounced up, each trying to fill its holes in a dissimilar way. One division, dark energy, proposes that the vacuum of space has an energy related with it and that energy origins the detected acceleration. The other drops under the influence of “scalar-tensor” gravity theories, which efficiently postulates a fifth force which is beyond gravity, electromagnetism and the strong and weak nuclear force, that changes gravity on cosmologically huge scales. Jain’s study is concentrated on the last chance; he is trying to characterize the properties of this fifth force that disturbs the forecasts general relativity creates outside our own galaxy, on cosmic length measures.
Read more at: http://arxiv.org/abs/1204.6044
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