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graviton
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The answer GRAVITON has 1 possible clue(s) in existing crosswords.
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Definitions of graviton in various dictionaries:
noun - a gauge boson that mediates the (extremely weak) gravitational interactions between particles
A hypothetical particle postulated to be the quantum of gravitational interaction and presumed to have an indefinitely long lifetime, zero electric charge, and zero rest mass.
noun - a hypothetical particle
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Hypothetical particle |
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Mar 29 2012 The Times - Concise |
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A hypothetical particle postulated to be the quantum of gravitational interaction and presumed to have an indefinitely long lifetime, zero electric charge, and zero rest mass. See Table at subatomic particle. |
a hypothetical quantum of gravitational energy, regarded as a particle. |
A hypothetical quantum of gravitational energy, regarded as a particle. |
Graviton description |
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In theories of quantum gravity, the graviton is the hypothetical elementary particle that mediates the force of gravity. There is no complete quantum field theory of gravitons due to an outstanding mathematical problem with renormalization in general relativity. In string theory the graviton is a massless state of a fundamental string. * If it exists, the graviton is expected to be massless because the gravitational force is very long range and appears to propagate at the speed of light, and a spin-2 boson because the source of gravitation is the stressenergy tensor, a second-order tensor (compared with electromagnetism's spin-1 photon, the source of which is the four-current, a first-order tensor). Additionally, it can be shown that any massless spin-2 field would give rise to a force indistinguishable from gravitation, because a massless spin-2 field would couple to the stressenergy tensor in the same way that gravitational interactions do. This result suggests that, if a massless |