Abstract
The long-range scalar field, associated with a neutral, massless, boson, has been generally considered to be nonexistent. This belief is based on the lack of overt effects, observed in the laboratory, from such a field. It is shown that if this long-range interaction were to exist, it would of necessity be weak. The physical reason for this is the large contribution, having its origin in the enormous amount of matter at great distance in the universe, to the magnitude of the scalar. By comparison, the contribution of local matter is miniscule, leading to a weak interaction of about the same strength as gravitation. Furthermore, it is shown that such an interaction, in its effects, would be very similar to gravitation and could be distinguished only with difficulty. It is concluded that there is not yet a compelling observation which could be used to exclude the long-range scalar interaction.

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