Tuesday, September 21, 2010

An idea about why gravitational force is weak

The gravitational force is rather weak under usual conditions. This fact is simply accepted and not much inquired. Today, in a colloquium with a very small circle of friends, we came up with a very eccentric idea. Here I would like to make just a record. It is drastically different from the conventionally held view. Since it is very new, it is in its infant stage. However, it is very attractive for these reasons:

(1) Let's assume that, all fundamental fermion particles are spin half and with charges. But no primary mass shall be particularly imposed.

(2) The particles don't interact with each other directly, but rather via bosons. The charges directly couple to photons, as indicated by the common Feynman diagrams, which an incoming charge and an outgoing charge meet with a photon. Due to the conservation of spin, it is necessary that the photon has spin 1.

(3) As widely held, the quantum of the gravitational field, which is represented by a metric tensor, should have spin 2. Now if two spin half charges interacted with a graviton in a way similar to that with a photon, the conservation of spin would be breached. Therefore, it is worth thinking about a simple way out: let the charges couple directly to photons while the photons couple to graviton. In this case, the spin can be conserved.

(4) Now what interesting may be inferred ? First, the masses of the charges emerge rather than be endowed. Second, the gravitational force is higher order effects, explaining its fragility. Third, a connection between mass and electrons may be established.

The thus-described idea is ridiculous, and worth thinking more.

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