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Jordan-Brans-Dicke theory

نگرهی ِ یوردان-برانز-دایک

negare-ye Jordan-Brans-Dicke

Fr.: théorie de Jordan-Brans-Dicke

A relativistic theory of gravitation which involves a → scalar field
in addition to the → metric (→ tensor field)
used in rarr; general relativity. It obeys the
→ equivalence principle, but tries at the same time to
comply with → Mach's principle owing to possible
spatial and temporal variations of the → gravitational constant,
which is inversely proportional to the scalar field. The theory uses a new dimensionless parameter
to determine the discrepancy between its predictions and those of
general relativity. So far there is no firm indication of its validity.
Same as → scalar-tensor theory.

Named after the creators, Carl Brans (1935-) and Robert Dicke (1916-1997),
who presented the theory in 1961, based on the initial work of Pascual Jordan
(1902-1980); → theory.