| dc.description.abstract | Chapter I begins with a general review of the four basic forces of nature, together with some of the theories that have been put forth in order to describe them. The following section, i.e., Section I.1, contains a brief discussion of gauge theories, and of various concepts such as spontaneous symmetry breaking, Higgs mechanism etc. that are connected with gauge theories, along with the recent model of the gauge unification of the electromagnetic and weak interactions.
In Chapter II, the concept of strong or f-gravity is introduced, i.e., the self-interacting spin-2 field mediated by massive tensor mesons. Several arguments have been given in support of strong gravity, with specific emphasis on the importance of invoking the concept of strong gravity in hadron physics, and also in the universe in the hadronic era, in view of the fact that strong gravity seems to operate only within the interior of hadrons. Analogous to the weak gravity of Newton and Einstein, the strong gravity field is also described by Einstein-type field equations, but with the Newtonian constant replaced by the strong gravity constant. Further, it is shown that linearization of strong gravity on a uniformly curved (de Sitter) background space leads to massive tensor and scalar field equations. Chapter II then concludes with some remarks on Dirac's large number hypothesis reviewed in the light of the strong gravity concept.
Chapter III starts with the general features of two-tensor theories. This is followed by study of the strong gravity field coupled to the SU(3) gauge fields. For this purpose, we have first made use of a conformally flat system of space-time coordinates. This leads to decoupling of the two fields. So we have subsequently studied the problem using a more general metric (namely the Robertson-Walker metric), whereby we have found that the equations remain coupled. However, in both cases we have been able to obtain Yukawa-like solutions for the strong gravity potential (under certain approximations) for the mass-modified field equations, along with some other terms arising from the gauge field.
Chapter IV attempts to link up strong gravity with other basic forces of nature. With the help of the vierbein formalism, a link-up of strong gravity with the weak interactions is demonstrated. Likewise, by finding a quantitative relationship between the strong interaction constant (g²/4?) and the parameters of strong gravity, namely G? etc., we have been able to find a relation between strong gravity and the strong interactions. Similar results have been worked out for strong gravity and the Maxwell field.
Chapter V attempts to cast strong gravity in the framework of the gauge theory formalism of Section I.1.
The thesis concludes with Chapter VI which makes a few remarks on the possibility of a grand unification of all the fundamental forces. | |
